CPU Optimizations


Recommended Posts

3.141592653589793238462643383279502884197169399375105820974944592307\

81640628620899862803482534211706798214808651328230664709384460955058\

22317253594081284811174502841027019385211055596446229489549303819644\

28810975665933446128475648233786783165271201909145648566923460348610\

45432664821339360726024914127372458700660631558817488152092096282925\

40917153643678925903600113305305488204665213841469519415116094330572\

70365759591953092186117381932611793105118548074462379962749567351885\

75272489122793818301194912983367336244065664308602139494639522473719\

07021798609437027705392171762931767523846748184676694051320005681271\

45263560827785771342757789609173637178721468440901224953430146549585\

37105079227968925892354201995611212902196086403441815981362977477130\

99605187072113499999983729780499510597317328160963185950244594553469\

08302642522308253344685035261931188171010003137838752886587533208381\

42061717766914730359825349042875546873115956286388235378759375195778\

18577805321712268066130019278766111959092164201989380952572010654858\

63278865936153381827968230301952035301852968995773622599413891249721\

77528347913151557485724245415069595082953311686172785588907509838175\

46374649393192550604009277016711390098488240128583616035637076601047\

10181942955596198946767837449448255379774726847104047534646208046684\

25906949129331367702898915210475216205696602405803815019351125338243\

00355876402474964732639141992726042699227967823547816360093417216412\

19924586315030286182974555706749838505494588586926995690927210797509\

30295532116534498720275596023648066549911988183479775356636980742654\

25278625518184175746728909777727938000816470600161452491921732172147\

72350141441973568548161361157352552133475741849468438523323907394143\

33454776241686251898356948556209921922218427255025425688767179049460\

16534668049886272327917860857843838279679766814541009538837863609506\

80064225125205117392984896084128488626945604241965285022210661186306\

74427862203919494504712371378696095636437191728746776465757396241389\

08658326459958133904780275900994657640789512694683983525957098258226\

20522489407726719478268482601476990902640136394437455305068203496252\

45174939965143142980919065925093722169646151570985838741059788595977\

29754989301617539284681382686838689427741559918559252459539594310499\

72524680845987273644695848653836736222626099124608051243884390451244\

13654976278079771569143599770012961608944169486855584840635342207222\

58284886481584560285060168427394522674676788952521385225499546667278\

23986456596116354886230577456498035593634568174324112515076069479451\

09659609402522887971089314566913686722874894056010150330861792868092\

08747609178249385890097149096759852613655497818931297848216829989487\

22658804857564014270477555132379641451523746234364542858444795265867\

82105114135473573952311342716610213596953623144295248493718711014576\

54035902799344037420073105785390621983874478084784896833214457138687\

51943506430218453191048481005370614680674919278191197939952061419663\

42875444064374512371819217999839101591956181467514269123974894090718\

64942319615679452080951465502252316038819301420937621378559566389377\

87083039069792077346722182562599661501421503068038447734549202605414\

66592520149744285073251866600213243408819071048633173464965145390579\

62685610055081066587969981635747363840525714591028970641401109712062\

80439039759515677157700420337869936007230558763176359421873125147120\

53292819182618612586732157919841484882916447060957527069572209175671\

16722910981690915280173506712748583222871835209353965725121083579151\

36988209144421006751033467110314126711136990865851639831501970165151\

16851714376576183515565088490998985998238734552833163550764791853589\

32261854896321329330898570642046752590709154814165498594616371802709\

81994309924488957571282890592323326097299712084433573265489382391193\

25974636673058360414281388303203824903758985243744170291327656180937\

73444030707469211201913020330380197621101100449293215160842444859637\

66983895228684783123552658213144957685726243344189303968642624341077\

32269780280731891544110104468232527162010526522721116603966655730925\

47110557853763466820653109896526918620564769312570586356620185581007\

29360659876486117910453348850346113657686753249441668039626579787718\

55608455296541266540853061434443185867697514566140680070023787765913\

44017127494704205622305389945613140711270004078547332699390814546646\

45880797270826683063432858785698305235808933065757406795457163775254\

20211495576158140025012622859413021647155097925923099079654737612551\

76567513575178296664547791745011299614890304639947132962107340437518\

95735961458901938971311179042978285647503203198691514028708085990480\

10941214722131794764777262241425485454033215718530614228813758504306\

33217518297986622371721591607716692547487389866549494501146540628433\

66393790039769265672146385306736096571209180763832716641627488880078\

69256029022847210403172118608204190004229661711963779213375751149595\

01566049631862947265473642523081770367515906735023507283540567040386\

74351362222477158915049530984448933309634087807693259939780541934144\

73774418426312986080998886874132604720

real 0m35.209s

user 0m34.574s

sys 0m0.125s

CPU (x2 because it's a Duo):

vendor_id : GenuineIntel

cpu family : 6

model : 15

model name : Intel® Core2 Duo CPU T7500 @ 2.20GHz

stepping : 10

microcode : 0x95

cpu MHz : 2201.000

cache size : 4096 KB

physical id : 0

siblings : 2

core id : 0

cpu cores : 2

apicid : 0

initial apicid : 0

fdiv_bug : no

hlt_bug : no

f00f_bug : no

coma_bug : no

fpu : yes

fpu_exception : yes

cpuid level : 10

wp : yes

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm ida dtherm tpr_shadow vnmi flexpriority

bogomips : 4388.90

clflush size : 64

cache_alignment : 64

address sizes : 36 bits physical, 48 bits virtual

RAM: 2064444 kB

Kernel: GNU/Linux 3.8.4-102.fc17.i686.PAE #1 SMP

I definitely can shave seconds off with my Kernel customizations. Its like F1 lol Shaving seconds off is rock hard. I imagine it will depend on what else is running on the machine at the time. It might be better to drop to a root prompt and run it from there before the OS has change to load anything else. See if that makes much difference.

We have covered a good set of results, I was thinking that someone working on some deep research military facility or from a super computer would post times over under 1sec lol! No such luck

That would be awesome! We are still missing MIPS, Alpha, and PowerPC results too, though. It seems like there isn't much variation within the same architecture, but there is much more variance between architectures. That might be partially due to the limited results we have for everything other than x86; I'm not quite sure.

Off Topic: Why is there no "Like This" button on any of your posts? It doesn't show up for any of your posts in this thread or your compiling upstream kernel guide thread, but I can see it for everyone else (other than myself, of course).

Thanks for the extra information! Are you running the armel Debian image or the armhf Raspbian variant? Your Raspberry Pi results are very similar to the result I posted of Debian running on an old smartphone. If you are running the armel version, then that comparison makes sense, because the processor and clock speed are almost identical between the two devices. If you are running the armhf variant, then it makes less sense, because the Raspberry Pi's hardware floating unit should be much faster than the software floating point emulation used to obtain my result.

I'm using the Raspbian image. If I had another SD card I'd pop the armel image on it and post the result. Any other takers for that? :)

Off Topic: Why is there no "Like This" button on any of your posts? It doesn't show up for any of your posts in this thread or your compiling upstream kernel guide thread, but I can see it for everyone else (other than myself, of course).

He doesn't have the 'Member' badge under his avatar either, I wonder if this has something to do with his group being set to 'Restricted (Profile)'?

So I went back to compiling the latest 3.8.8 Stable kernel last night and there is a significant performance decrease, With this test and overall system performance. I am getting >30Seconds with this test and the 3.8 Kernel compared with the 3.9RCx Kernel.

I got a warning once about a million years ago for posting a link to something so I think that's when my profile became restricted :-( I thought that got cleared though along with the warning...

MIPS here.

root@OpenWrt:~# echo "scale=5000; a(1)*4" | time bc -l
3.141592653589793238462643383279502884197169399375105820974944592307\
81640628620899862803482534211706798214808651328230664709384460955058\
22317253594081284811174502841027019385211055596446229489549303819644\
28810975665933446128475648233786783165271201909145648566923460348610\
45432664821339360726024914127372458700660631558817488152092096282925\
40917153643678925903600113305305488204665213841469519415116094330572\
70365759591953092186117381932611793105118548074462379962749567351885\
75272489122793818301194912983367336244065664308602139494639522473719\
07021798609437027705392171762931767523846748184676694051320005681271\
45263560827785771342757789609173637178721468440901224953430146549585\
37105079227968925892354201995611212902196086403441815981362977477130\
99605187072113499999983729780499510597317328160963185950244594553469\
08302642522308253344685035261931188171010003137838752886587533208381\
42061717766914730359825349042875546873115956286388235378759375195778\
18577805321712268066130019278766111959092164201989380952572010654858\
63278865936153381827968230301952035301852968995773622599413891249721\
77528347913151557485724245415069595082953311686172785588907509838175\
46374649393192550604009277016711390098488240128583616035637076601047\
10181942955596198946767837449448255379774726847104047534646208046684\
25906949129331367702898915210475216205696602405803815019351125338243\
00355876402474964732639141992726042699227967823547816360093417216412\
19924586315030286182974555706749838505494588586926995690927210797509\
30295532116534498720275596023648066549911988183479775356636980742654\
25278625518184175746728909777727938000816470600161452491921732172147\
72350141441973568548161361157352552133475741849468438523323907394143\
33454776241686251898356948556209921922218427255025425688767179049460\
16534668049886272327917860857843838279679766814541009538837863609506\
80064225125205117392984896084128488626945604241965285022210661186306\
74427862203919494504712371378696095636437191728746776465757396241389\
08658326459958133904780275900994657640789512694683983525957098258226\
20522489407726719478268482601476990902640136394437455305068203496252\
45174939965143142980919065925093722169646151570985838741059788595977\
29754989301617539284681382686838689427741559918559252459539594310499\
72524680845987273644695848653836736222626099124608051243884390451244\
13654976278079771569143599770012961608944169486855584840635342207222\
58284886481584560285060168427394522674676788952521385225499546667278\
23986456596116354886230577456498035593634568174324112515076069479451\
09659609402522887971089314566913686722874894056010150330861792868092\
08747609178249385890097149096759852613655497818931297848216829989487\
22658804857564014270477555132379641451523746234364542858444795265867\
82105114135473573952311342716610213596953623144295248493718711014576\
54035902799344037420073105785390621983874478084784896833214457138687\
51943506430218453191048481005370614680674919278191197939952061419663\
42875444064374512371819217999839101591956181467514269123974894090718\
64942319615679452080951465502252316038819301420937621378559566389377\
87083039069792077346722182562599661501421503068038447734549202605414\
66592520149744285073251866600213243408819071048633173464965145390579\
62685610055081066587969981635747363840525714591028970641401109712062\
80439039759515677157700420337869936007230558763176359421873125147120\
53292819182618612586732157919841484882916447060957527069572209175671\
16722910981690915280173506712748583222871835209353965725121083579151\
36988209144421006751033467110314126711136990865851639831501970165151\
16851714376576183515565088490998985998238734552833163550764791853589\
32261854896321329330898570642046752590709154814165498594616371802709\
81994309924488957571282890592323326097299712084433573265489382391193\
25974636673058360414281388303203824903758985243744170291327656180937\
73444030707469211201913020330380197621101100449293215160842444859637\
66983895228684783123552658213144957685726243344189303968642624341077\
32269780280731891544110104468232527162010526522721116603966655730925\
47110557853763466820653109896526918620564769312570586356620185581007\
29360659876486117910453348850346113657686753249441668039626579787718\
55608455296541266540853061434443185867697514566140680070023787765913\
44017127494704205622305389945613140711270004078547332699390814546646\
45880797270826683063432858785698305235808933065757406795457163775254\
20211495576158140025012622859413021647155097925923099079654737612551\
76567513575178296664547791745011299614890304639947132962107340437518\
95735961458901938971311179042978285647503203198691514028708085990480\
10941214722131794764777262241425485454033215718530614228813758504306\
33217518297986622371721591607716692547487389866549494501146540628433\
66393790039769265672146385306736096571209180763832716641627488880078\
69256029022847210403172118608204190004229661711963779213375751149595\
01566049631862947265473642523081770367515906735023507283540567040386\
74351362222477158915049530984448933309634087807693259939780541934144\
73774418426312986080998886874132604720
real	4m 7.93s
user	4m 6.56s
sys	0m 0.90s
root@OpenWrt:~# uname -a
Linux OpenWrt 3.8.8 #2 Mon Apr 22 18:02:35 EEST 2013 mips GNU/Linux

And some lines from the kernel log (It's got 128MB of RAM I think)

[	0.000000] CPU revision is: 00019374 (MIPS 24Kc)
[	0.000000] SoC: Atheros AR7161 rev 2
[	0.000000] Clocks: CPU:680.000MHz, DDR:340.000MHz, AHB:170.000MHz, Ref:40.000MHz

Edit: Oh hey cpuinfo

root@OpenWrt:~# cat /proc/cpuinfo
system type        : Atheros AR7161 rev 2
machine            : NETGEAR WNDR3700/WNDR3800/WNDRMAC
processor        : 0
cpu model        : MIPS 24Kc V7.4
BogoMIPS        : 452.19
wait instruction    : yes
microsecond timers    : yes
tlb_entries        : 16
extra interrupt vector    : yes
hardware watchpoint    : yes, count: 4, address/irw mask: [0x0000, 0x0ff8, 0x0ff8, 0x0ff8]
ASEs implemented    : mips16
shadow register sets    : 1
kscratch registers    : 0
core            : 0
VCED exceptions        : not available
VCEI exceptions        : not available

root@chuck-SVE1711C5E:/home/chuck/Downloads# time echo "scale=5000; a(1)*4" | bc -l

3.141592653589793238462643383279502884197169399375105820974944592307\

81640628620899862803482534211706798214808651328230664709384460955058\

22317253594081284811174502841027019385211055596446229489549303819644\

28810975665933446128475648233786783165271201909145648566923460348610\

45432664821339360726024914127372458700660631558817488152092096282925\

40917153643678925903600113305305488204665213841469519415116094330572\

70365759591953092186117381932611793105118548074462379962749567351885\

75272489122793818301194912983367336244065664308602139494639522473719\

07021798609437027705392171762931767523846748184676694051320005681271\

45263560827785771342757789609173637178721468440901224953430146549585\

37105079227968925892354201995611212902196086403441815981362977477130\

99605187072113499999983729780499510597317328160963185950244594553469\

08302642522308253344685035261931188171010003137838752886587533208381\

42061717766914730359825349042875546873115956286388235378759375195778\

18577805321712268066130019278766111959092164201989380952572010654858\

63278865936153381827968230301952035301852968995773622599413891249721\

77528347913151557485724245415069595082953311686172785588907509838175\

46374649393192550604009277016711390098488240128583616035637076601047\

10181942955596198946767837449448255379774726847104047534646208046684\

25906949129331367702898915210475216205696602405803815019351125338243\

00355876402474964732639141992726042699227967823547816360093417216412\

19924586315030286182974555706749838505494588586926995690927210797509\

30295532116534498720275596023648066549911988183479775356636980742654\

25278625518184175746728909777727938000816470600161452491921732172147\

72350141441973568548161361157352552133475741849468438523323907394143\

33454776241686251898356948556209921922218427255025425688767179049460\

16534668049886272327917860857843838279679766814541009538837863609506\

80064225125205117392984896084128488626945604241965285022210661186306\

74427862203919494504712371378696095636437191728746776465757396241389\

08658326459958133904780275900994657640789512694683983525957098258226\

20522489407726719478268482601476990902640136394437455305068203496252\

45174939965143142980919065925093722169646151570985838741059788595977\

29754989301617539284681382686838689427741559918559252459539594310499\

72524680845987273644695848653836736222626099124608051243884390451244\

13654976278079771569143599770012961608944169486855584840635342207222\

58284886481584560285060168427394522674676788952521385225499546667278\

23986456596116354886230577456498035593634568174324112515076069479451\

09659609402522887971089314566913686722874894056010150330861792868092\

08747609178249385890097149096759852613655497818931297848216829989487\

22658804857564014270477555132379641451523746234364542858444795265867\

82105114135473573952311342716610213596953623144295248493718711014576\

54035902799344037420073105785390621983874478084784896833214457138687\

51943506430218453191048481005370614680674919278191197939952061419663\

42875444064374512371819217999839101591956181467514269123974894090718\

64942319615679452080951465502252316038819301420937621378559566389377\

87083039069792077346722182562599661501421503068038447734549202605414\

66592520149744285073251866600213243408819071048633173464965145390579\

62685610055081066587969981635747363840525714591028970641401109712062\

80439039759515677157700420337869936007230558763176359421873125147120\

53292819182618612586732157919841484882916447060957527069572209175671\

16722910981690915280173506712748583222871835209353965725121083579151\

36988209144421006751033467110314126711136990865851639831501970165151\

16851714376576183515565088490998985998238734552833163550764791853589\

32261854896321329330898570642046752590709154814165498594616371802709\

81994309924488957571282890592323326097299712084433573265489382391193\

25974636673058360414281388303203824903758985243744170291327656180937\

73444030707469211201913020330380197621101100449293215160842444859637\

66983895228684783123552658213144957685726243344189303968642624341077\

32269780280731891544110104468232527162010526522721116603966655730925\

47110557853763466820653109896526918620564769312570586356620185581007\

29360659876486117910453348850346113657686753249441668039626579787718\

55608455296541266540853061434443185867697514566140680070023787765913\

44017127494704205622305389945613140711270004078547332699390814546646\

45880797270826683063432858785698305235808933065757406795457163775254\

20211495576158140025012622859413021647155097925923099079654737612551\

76567513575178296664547791745011299614890304639947132962107340437518\

95735961458901938971311179042978285647503203198691514028708085990480\

10941214722131794764777262241425485454033215718530614228813758504306\

33217518297986622371721591607716692547487389866549494501146540628433\

66393790039769265672146385306736096571209180763832716641627488880078\

69256029022847210403172118608204190004229661711963779213375751149595\

01566049631862947265473642523081770367515906735023507283540567040386\

74351362222477158915049530984448933309634087807693259939780541934144\

73774418426312986080998886874132604720

real 0m21.453s

user 0m21.392s

sys 0m0.008s

i7 Sony VAIO with 3.8.8 Kernel and i7 Optimizations. Thats better. Don?t think I am going to get it under 20s

sorry, i've just realised that I forgot to post the results :p


[root@bertha /]# time echo "scale=5000; a(1)*4" | bc -l
3.141592653589793238462643383279502884197169399375105820974944592307\
81640628620899862803482534211706798214808651328230664709384460955058\
22317253594081284811174502841027019385211055596446229489549303819644\
28810975665933446128475648233786783165271201909145648566923460348610\
45432664821339360726024914127372458700660631558817488152092096282925\
40917153643678925903600113305305488204665213841469519415116094330572\
70365759591953092186117381932611793105118548074462379962749567351885\
75272489122793818301194912983367336244065664308602139494639522473719\
07021798609437027705392171762931767523846748184676694051320005681271\
45263560827785771342757789609173637178721468440901224953430146549585\
37105079227968925892354201995611212902196086403441815981362977477130\
99605187072113499999983729780499510597317328160963185950244594553469\
08302642522308253344685035261931188171010003137838752886587533208381\
42061717766914730359825349042875546873115956286388235378759375195778\
18577805321712268066130019278766111959092164201989380952572010654858\
63278865936153381827968230301952035301852968995773622599413891249721\
77528347913151557485724245415069595082953311686172785588907509838175\
46374649393192550604009277016711390098488240128583616035637076601047\
10181942955596198946767837449448255379774726847104047534646208046684\
25906949129331367702898915210475216205696602405803815019351125338243\
00355876402474964732639141992726042699227967823547816360093417216412\
19924586315030286182974555706749838505494588586926995690927210797509\
30295532116534498720275596023648066549911988183479775356636980742654\
25278625518184175746728909777727938000816470600161452491921732172147\
72350141441973568548161361157352552133475741849468438523323907394143\
33454776241686251898356948556209921922218427255025425688767179049460\
16534668049886272327917860857843838279679766814541009538837863609506\
80064225125205117392984896084128488626945604241965285022210661186306\
74427862203919494504712371378696095636437191728746776465757396241389\
08658326459958133904780275900994657640789512694683983525957098258226\
20522489407726719478268482601476990902640136394437455305068203496252\
45174939965143142980919065925093722169646151570985838741059788595977\
29754989301617539284681382686838689427741559918559252459539594310499\
72524680845987273644695848653836736222626099124608051243884390451244\
13654976278079771569143599770012961608944169486855584840635342207222\
58284886481584560285060168427394522674676788952521385225499546667278\
23986456596116354886230577456498035593634568174324112515076069479451\
09659609402522887971089314566913686722874894056010150330861792868092\
08747609178249385890097149096759852613655497818931297848216829989487\
22658804857564014270477555132379641451523746234364542858444795265867\
82105114135473573952311342716610213596953623144295248493718711014576\
54035902799344037420073105785390621983874478084784896833214457138687\
51943506430218453191048481005370614680674919278191197939952061419663\
42875444064374512371819217999839101591956181467514269123974894090718\
64942319615679452080951465502252316038819301420937621378559566389377\
87083039069792077346722182562599661501421503068038447734549202605414\
66592520149744285073251866600213243408819071048633173464965145390579\
62685610055081066587969981635747363840525714591028970641401109712062\
80439039759515677157700420337869936007230558763176359421873125147120\
53292819182618612586732157919841484882916447060957527069572209175671\
16722910981690915280173506712748583222871835209353965725121083579151\
36988209144421006751033467110314126711136990865851639831501970165151\
16851714376576183515565088490998985998238734552833163550764791853589\
32261854896321329330898570642046752590709154814165498594616371802709\
81994309924488957571282890592323326097299712084433573265489382391193\
25974636673058360414281388303203824903758985243744170291327656180937\
73444030707469211201913020330380197621101100449293215160842444859637\
66983895228684783123552658213144957685726243344189303968642624341077\
32269780280731891544110104468232527162010526522721116603966655730925\
47110557853763466820653109896526918620564769312570586356620185581007\
29360659876486117910453348850346113657686753249441668039626579787718\
55608455296541266540853061434443185867697514566140680070023787765913\
44017127494704205622305389945613140711270004078547332699390814546646\
45880797270826683063432858785698305235808933065757406795457163775254\
20211495576158140025012622859413021647155097925923099079654737612551\
76567513575178296664547791745011299614890304639947132962107340437518\
95735961458901938971311179042978285647503203198691514028708085990480\
10941214722131794764777262241425485454033215718530614228813758504306\
33217518297986622371721591607716692547487389866549494501146540628433\
66393790039769265672146385306736096571209180763832716641627488880078\
69256029022847210403172118608204190004229661711963779213375751149595\
01566049631862947265473642523081770367515906735023507283540567040386\
74351362222477158915049530984448933309634087807693259939780541934144\
73774418426312986080998886874132604720

real 0m30.826s
user 0m30.807s
sys 0m0.000s

Intel Core 2 Quad Q6600 using Kernel 3.8.7-1-ARCH

I should really thing about customising my kernel config but just havent had the time :/

"real 0m33.296s

user 0m33.268s

sys 0m0.012s"

(hack)Mac, Q6700, 6GB DDR2 RAM

Slightly different hardware (2GB DDR2 RAM, different system) but duo version of that quad core processor;

# time echo "scale=5000; a(1)*4" | bc -l

3.141592653589793238462643383279502884197169399375105820974944592307\

81640628620899862803482534211706798214808651328230664709384460955058\

22317253594081284811174502841027019385211055596446229489549303819644\

28810975665933446128475648233786783165271201909145648566923460348610\

45432664821339360726024914127372458700660631558817488152092096282925\

40917153643678925903600113305305488204665213841469519415116094330572\

70365759591953092186117381932611793105118548074462379962749567351885\

75272489122793818301194912983367336244065664308602139494639522473719\

07021798609437027705392171762931767523846748184676694051320005681271\

45263560827785771342757789609173637178721468440901224953430146549585\

37105079227968925892354201995611212902196086403441815981362977477130\

99605187072113499999983729780499510597317328160963185950244594553469\

08302642522308253344685035261931188171010003137838752886587533208381\

42061717766914730359825349042875546873115956286388235378759375195778\

18577805321712268066130019278766111959092164201989380952572010654858\

63278865936153381827968230301952035301852968995773622599413891249721\

77528347913151557485724245415069595082953311686172785588907509838175\

46374649393192550604009277016711390098488240128583616035637076601047\

10181942955596198946767837449448255379774726847104047534646208046684\

25906949129331367702898915210475216205696602405803815019351125338243\

00355876402474964732639141992726042699227967823547816360093417216412\

19924586315030286182974555706749838505494588586926995690927210797509\

30295532116534498720275596023648066549911988183479775356636980742654\

25278625518184175746728909777727938000816470600161452491921732172147\

72350141441973568548161361157352552133475741849468438523323907394143\

33454776241686251898356948556209921922218427255025425688767179049460\

16534668049886272327917860857843838279679766814541009538837863609506\

80064225125205117392984896084128488626945604241965285022210661186306\

74427862203919494504712371378696095636437191728746776465757396241389\

08658326459958133904780275900994657640789512694683983525957098258226\

20522489407726719478268482601476990902640136394437455305068203496252\

45174939965143142980919065925093722169646151570985838741059788595977\

29754989301617539284681382686838689427741559918559252459539594310499\

72524680845987273644695848653836736222626099124608051243884390451244\

13654976278079771569143599770012961608944169486855584840635342207222\

58284886481584560285060168427394522674676788952521385225499546667278\

23986456596116354886230577456498035593634568174324112515076069479451\

09659609402522887971089314566913686722874894056010150330861792868092\

08747609178249385890097149096759852613655497818931297848216829989487\

22658804857564014270477555132379641451523746234364542858444795265867\

82105114135473573952311342716610213596953623144295248493718711014576\

54035902799344037420073105785390621983874478084784896833214457138687\

51943506430218453191048481005370614680674919278191197939952061419663\

42875444064374512371819217999839101591956181467514269123974894090718\

64942319615679452080951465502252316038819301420937621378559566389377\

87083039069792077346722182562599661501421503068038447734549202605414\

66592520149744285073251866600213243408819071048633173464965145390579\

62685610055081066587969981635747363840525714591028970641401109712062\

80439039759515677157700420337869936007230558763176359421873125147120\

53292819182618612586732157919841484882916447060957527069572209175671\

16722910981690915280173506712748583222871835209353965725121083579151\

36988209144421006751033467110314126711136990865851639831501970165151\

16851714376576183515565088490998985998238734552833163550764791853589\

32261854896321329330898570642046752590709154814165498594616371802709\

81994309924488957571282890592323326097299712084433573265489382391193\

25974636673058360414281388303203824903758985243744170291327656180937\

73444030707469211201913020330380197621101100449293215160842444859637\

66983895228684783123552658213144957685726243344189303968642624341077\

32269780280731891544110104468232527162010526522721116603966655730925\

47110557853763466820653109896526918620564769312570586356620185581007\

29360659876486117910453348850346113657686753249441668039626579787718\

55608455296541266540853061434443185867697514566140680070023787765913\

44017127494704205622305389945613140711270004078547332699390814546646\

45880797270826683063432858785698305235808933065757406795457163775254\

20211495576158140025012622859413021647155097925923099079654737612551\

76567513575178296664547791745011299614890304639947132962107340437518\

95735961458901938971311179042978285647503203198691514028708085990480\

10941214722131794764777262241425485454033215718530614228813758504306\

33217518297986622371721591607716692547487389866549494501146540628433\

66393790039769265672146385306736096571209180763832716641627488880078\

69256029022847210403172118608204190004229661711963779213375751149595\

01566049631862947265473642523081770367515906735023507283540567040386\

74351362222477158915049530984448933309634087807693259939780541934144\

73774418426312986080998886874132604720

real 0m28.693s

user 0m27.857s

sys 0m0.030s

Linux H3K-Dell 3.8.8-1-ARCH #1 SMP PREEMPT Wed Apr 17 10:57:28 CEST 2013 x86_64 GNU/Linux

Interesting to note that macs are - once again - not optimised!

My Funtoo Box

sewa@cucolinux ~ $ cat /etc/gentoo-release && uname -a && cat /etc/make.conf | grep "CFLAGS"
Funtoo Linux - baselayout 2.2.0
Linux cucolinux 3.8.8-ck1-sewa #1 SMP PREEMPT Wed Apr 24 15:38:35 CLT 2013 x86_64 Intel(R) Core(TM) i5-2410M CPU @ 2.30GHz GenuineIntel GNU/Linux
CFLAGS="-march=corei7-avx -O2 -pipe"
4gb Ram DDR3[/CODE]

[CODE]sewa@cucolinux ~ $ time echo "scale=5000; a(1)*4" | bc -l
3.141592653589793238462643383279502884197169399375105820974944592307\
81640628620899862803482534211706798214808651328230664709384460955058\
22317253594081284811174502841027019385211055596446229489549303819644\
28810975665933446128475648233786783165271201909145648566923460348610\
45432664821339360726024914127372458700660631558817488152092096282925\
40917153643678925903600113305305488204665213841469519415116094330572\
70365759591953092186117381932611793105118548074462379962749567351885\
75272489122793818301194912983367336244065664308602139494639522473719\
07021798609437027705392171762931767523846748184676694051320005681271\
45263560827785771342757789609173637178721468440901224953430146549585\
37105079227968925892354201995611212902196086403441815981362977477130\
99605187072113499999983729780499510597317328160963185950244594553469\
08302642522308253344685035261931188171010003137838752886587533208381\
42061717766914730359825349042875546873115956286388235378759375195778\
18577805321712268066130019278766111959092164201989380952572010654858\
63278865936153381827968230301952035301852968995773622599413891249721\
77528347913151557485724245415069595082953311686172785588907509838175\
46374649393192550604009277016711390098488240128583616035637076601047\
10181942955596198946767837449448255379774726847104047534646208046684\
25906949129331367702898915210475216205696602405803815019351125338243\
00355876402474964732639141992726042699227967823547816360093417216412\
19924586315030286182974555706749838505494588586926995690927210797509\
30295532116534498720275596023648066549911988183479775356636980742654\
25278625518184175746728909777727938000816470600161452491921732172147\
72350141441973568548161361157352552133475741849468438523323907394143\
33454776241686251898356948556209921922218427255025425688767179049460\
16534668049886272327917860857843838279679766814541009538837863609506\
80064225125205117392984896084128488626945604241965285022210661186306\
74427862203919494504712371378696095636437191728746776465757396241389\
08658326459958133904780275900994657640789512694683983525957098258226\
20522489407726719478268482601476990902640136394437455305068203496252\
45174939965143142980919065925093722169646151570985838741059788595977\
29754989301617539284681382686838689427741559918559252459539594310499\
72524680845987273644695848653836736222626099124608051243884390451244\
13654976278079771569143599770012961608944169486855584840635342207222\
58284886481584560285060168427394522674676788952521385225499546667278\
23986456596116354886230577456498035593634568174324112515076069479451\
09659609402522887971089314566913686722874894056010150330861792868092\
08747609178249385890097149096759852613655497818931297848216829989487\
22658804857564014270477555132379641451523746234364542858444795265867\
82105114135473573952311342716610213596953623144295248493718711014576\
54035902799344037420073105785390621983874478084784896833214457138687\
51943506430218453191048481005370614680674919278191197939952061419663\
42875444064374512371819217999839101591956181467514269123974894090718\
64942319615679452080951465502252316038819301420937621378559566389377\
87083039069792077346722182562599661501421503068038447734549202605414\
66592520149744285073251866600213243408819071048633173464965145390579\
62685610055081066587969981635747363840525714591028970641401109712062\
80439039759515677157700420337869936007230558763176359421873125147120\
53292819182618612586732157919841484882916447060957527069572209175671\
16722910981690915280173506712748583222871835209353965725121083579151\
36988209144421006751033467110314126711136990865851639831501970165151\
16851714376576183515565088490998985998238734552833163550764791853589\
32261854896321329330898570642046752590709154814165498594616371802709\
81994309924488957571282890592323326097299712084433573265489382391193\
25974636673058360414281388303203824903758985243744170291327656180937\
73444030707469211201913020330380197621101100449293215160842444859637\
66983895228684783123552658213144957685726243344189303968642624341077\
32269780280731891544110104468232527162010526522721116603966655730925\
47110557853763466820653109896526918620564769312570586356620185581007\
29360659876486117910453348850346113657686753249441668039626579787718\
55608455296541266540853061434443185867697514566140680070023787765913\
44017127494704205622305389945613140711270004078547332699390814546646\
45880797270826683063432858785698305235808933065757406795457163775254\
20211495576158140025012622859413021647155097925923099079654737612551\
76567513575178296664547791745011299614890304639947132962107340437518\
95735961458901938971311179042978285647503203198691514028708085990480\
10941214722131794764777262241425485454033215718530614228813758504306\
33217518297986622371721591607716692547487389866549494501146540628433\
66393790039769265672146385306736096571209180763832716641627488880078\
69256029022847210403172118608204190004229661711963779213375751149595\
01566049631862947265473642523081770367515906735023507283540567040386\
74351362222477158915049530984448933309634087807693259939780541934144\
73774418426312986080998886874132604720
real 0m29.476s
user 0m29.432s
sys 0m0.008s[/CODE]

Interesting to note that macs are - once again - not optimised!

What do you mean, exactly? I have a hard time believing that the Intel processors that Apple puts into their machines are significantly different or "less optimized" than standard Intel processors. If you are referring to the Linux kernel itself, how could the same kernel that runs on other machines be less optimized for the same processor on a Mac? Does the firmware make some difference in these results as well? I don't think it would, since the microcode is built into the kernel or loaded from the root filesystem at runtime, but there could be something that I'm overlooking.

I have an interesting observation that is not strictly related to this thread, but it might be of some minor relevance to your comment. A friend of mine has a Macbook Pro 5.1 and an ASUS EEE PC 1201T. He migrated from using Ubuntu 12.04 on the Macbook Pro to using Ubuntu 12.04 on the EEE a few months ago. He reinstalled Ubuntu on the EEE because the Macbook Pro has an NVIDIA graphics (for which he had to use the proprietary NVIDIA driver) and other hardware-specific configuration hacks in Ubuntu to make it work properly - the EEE needs none of that. Although the EEE has less RAM (2 GB instead of 4GB) and the processor and graphics card are technically weaker, it performs noticeably better than the Macbook Pro (in Ubuntu or OS X). He noticed immediately after he finished configuring his new installation of Ubuntu on the EEE that his boot time was about 1/2 that of his Macbook Pro and programs opened significantly faster.

What do you mean, exactly? I have a hard time believing that the Intel processors that Apple puts into their machines are significantly different or "less optimized" than standard Intel processors. If you are referring to the Linux kernel itself, how could the same kernel that runs on other machines be less optimized for the same processor on a Mac? Does the firmware make some difference in these results as well? I don't think it would, since the microcode is built into the kernel or loaded from the root filesystem at runtime, but there could be something that I'm overlooking.

I have an interesting observation that is not strictly related to this thread, but it might be of some minor relevance to your comment. A friend of mine has a Macbook Pro 5.1 and an ASUS EEE PC 1201T. He migrated from using Ubuntu 12.04 on the Macbook Pro to using Ubuntu 12.04 on the EEE a few months ago. He reinstalled Ubuntu on the EEE because the Macbook Pro has an NVIDIA graphics (for which he had to use the proprietary NVIDIA driver) and other hardware-specific configuration hacks in Ubuntu to make it work properly - the EEE needs none of that. Although the EEE has less RAM (2 GB instead of 4GB) and the processor and graphics card are technically weaker, it performs noticeably better than the Macbook Pro (in Ubuntu or OS X). He noticed immediately after he finished configuring his new installation of Ubuntu on the EEE that his boot time was about 1/2 that of his Macbook Pro and programs opened significantly faster.

He wasn't talking about hardware.

Im my opinion the GNU/Linux kernel cannot be compared to the Darwin kernel. Simply because they are far to different from each other, Darwin is an amalgamation of the BSD kernel and Mach kernel. Neither of which are a GNU/Linux kernels to my knowledge. Darwin is a hybrid kernel rather than the monolithic GNU/Linux kernel.

Im my opinion the GNU/Linux kernel cannot be compared to the Darwin kernel. Simply because they are far to different from each other, Darwin is an amalgamation of the BSD kernel and Mach kernel. Neither of which are a GNU/Linux kernels to my knowledge. Darwin is a hybrid kernel rather than the monolithic GNU/Linux kernel.

Pretty valid points. Would be interesting to see this run on something like baremetal.

ASM coders anyone? :)

Pretty valid points. Would be interesting to see this run on something like baremetal.

ASM coders anyone? :)

I fail to see what doing toy floating point operations is going to prove. What really matters is real world performance. For that reason I think comparisons between floating point operations in Windows, Linux, OS X, and BSD are completely valid. I would be interested in seeing such a comparison, but that was not the OP's purpose in creating this thread. He wanted a point of comparison for making floating point faster in the Linux kernel. I think we have accomplished that satisfactorily by now. If you wanted to devise a floating point test that could run on a couple different operating systems (or even just use this test if you only care about POSIX compliant systems) and created a new thread about it, I would participate.

Im my opinion the GNU/Linux kernel cannot be compared to the Darwin kernel. Simply because they are far to different from each other, Darwin is an amalgamation of the BSD kernel and Mach kernel. Neither of which are a GNU/Linux kernels to my knowledge. Darwin is a hybrid kernel rather than the monolithic GNU/Linux kernel.
Darwin is XNU
This topic is now closed to further replies.
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Posts

    • Ocenaudio 3.19.3 by Razvan Serea  Ocenaudio is a full featured, fast and easy to use audio and music editor. It is the ideal software for people who need to edit and analyze audio files without complications. Ocenaudio also has powerful features that will please more advanced users. To assist ocenaudio development, a powerful toolset of audio editing, analysis and manipulation called Ocen Framework was created. ocenaudio is also based on Qt framework, a well known library for cross-platform development. Cross-platform support ocenaudio is available for all major operating systems: Microsoft Windows, Mac OS X and Linux. Native applications are generated for each platform from a common source, in order to achieve excelent performance and seamless integration with the operating system. All versions of ocenaudio have a uniform set of features and the same graphical interface, so the skills you learn in one platform can be used in the others. VST plugins support Ocenaudio supports VST (Virtual Studio Technology) plugins, giving its users access to numerous effects. Like the native effects, VST effects can use real-time preview to aide configuration. Real-time preview of effects Applying effects such as EQ, gain and filtering is an important part of audio editing. However, it is very tricky to get the desired result by adjusting the controls configuration alone: you must listen the processed audio. To ease the configuration of audio effects, ocenaudio has a real time preview feature: you hear the processed signal while adjusting the controls. The effect configuration window also includes a miniature view of the selected audio signal. You can navigate on this miniature view in the same way as you do on the main interface, selecting parts that interest you and listening to the effect result in real time. Multiselection for delicate editions To speed up complex audio files editing, ocenaudio includes multi-selection. With this amazing tool, you can simultaneously select different portions of an audio file and listen, edit or even apply an effect to them. For example, if you want to normalize only the excerpts of an interview where the interviewee is talking, just select them and apply the effect. Eficient edition of large files With ocenaudio, there is no limit to the length or the quantity of the audio files you can edit. Using an advanced memory management system, the application keeps your files open without wasting any of your computer's memory. Even in files several hours long, common editing operations such as copy, cut or paste happen almost instantly. Fully featured spectrogram Besides offering an incredible waveform view of your audio files, ocenaudio has a powerful and complete spectrogram view. In this view, you can analyze the spectral content of your audio signal with maximum clarity. Advanced users will be surprised to find that the spectrogram settings are applied in real time. The display is updated immediately when altering features such as the number of frequency bands, window type and size and dynamic range of the display. Ocenaudio 3.19.3 changelog: Fixes issues with MP4 files with more than 8 channels Fixes incorrect VBR detection for some CBR MP3 files Other bug fixes and improvements Download: Ocenaudio 64-bit | Portable | ~40.0 MB (Freeware) Download: Ocenaudio for Linux and Mac OS View: Ocenaudio Homepage | Screenshot Get alerted to all of our Software updates on Twitter at @NeowinSoftware
    • DiskGenius 6.2.0.1829 - All Versions: Free, Lite & Portable by Razvan Serea DiskGenius is a full-featured partition manager, which is designed to optimize disk usage for Windows users. It will efficiently help you recover lost data, resize/split partition, backup files, edit hex data, check bad sectors, manage virtual disks, erase data, etc.. Create a system image backup for current Windows with simple clicks to keep the operating system under protection. DiskGenius key features: Partition Management - It can create format, resize, extend, backup, split, hide and clone partition, both MBR and GPT are supported. Disk and partition conversion - Convert dynamic disk to basic, convert virtual disk format and convert MBR to GPT, convert primary partition to logical. File recovery - It can recover files deleted or emptied form recycle bin, recover files from damaged partition or disk and recover files by file type and supports file preview and file filter. Partition recovery - It is the best partition recovery program in that it can recover files from damaged, corrupted and RAW partitions, search for lost partition and recover files from it, besides, it can fix partition table. RAID recovery - It can reconstruct Virtual RAID and recover files from it, and all RAID types are supported. Sector Editor - A Hex editor is embedded to help users edit raw hex data and recover data manually. Backup and Restore - It can backup and restore partition including system partition, hard disk and partition table. Bad Tracks - It can check and repair bad sectors for all storage devices; check hard disk S.M.A.R.T. information. Delete files permanently - It can delete files permanently so that they can't be recovered by any data recovery software. Virtual Disk - It supports virtual disks, including VMware, Virtual PC and Virtual Box. Create WinPE bootable disk and you can manage disk partition when system crashes or there is no operating system on your computer. Support FAT12/FAT16/FAt32/exFAT/NTFS/EXT2/EXT3/EXT4 file system format. DiskGenius 6.2.0.1829 changelog: Add the "Disk Speed Test" feature. Add the "Windows Boot Repair and Conversion" feature. Add the BMB21-2019 erase standard to the "Erase Sectors" feature. Add support for restoring an individual partition from a PMFX disk image file. Enhanced The "Verify Or Repair Bad Sectors/Blocks" feature displays disk read speed in the detection window during scanning. The "Quick Partition" dialog box allows users to quickly select the number of partitions by pressing the numeric keys 1, 2, 7, 8, or 9. The "Set Volume Name" dialog box supports selecting preset volume labels provided by the software. The "Copy Sectors" feature supports resuming copy tasks after modifying the number of skipped bad sectors. Add the "TRIM Optimization" option to the format dialog box. The "Clone Partition" and "Clone Disk" features perform TRIM optimization on target partitions or disks before cloning. Add support for Not Equal To search conditions (prefixed with "!") when searching hexadecimal data in the sector editor. Optimize the display of capacity values in the program interface to show two decimal places. Add a minimize button to dialogs that may require long processing time. Enhance support for the ReFS file system. Enhance support for newer HIF and MP4 formats when recovering files by type. Enhance support for the EXT4 file system. Enhance compatibility of the "File Recovery" feature with special data structures. Fixed Fixed the issue that the selected file system type automatically reverted to NTFS after changing it to exFAT or EXT4 in the "Quick Partition" dialog box. Fixed inaccurate Unicode string search results in the "Sector Editor" feature. Fixed the issue that exceptions might occur when adding multiple disks in the "Erase Sectors" feature. Fixed the issue that insufficient target disk space was incorrectly reported in some cases when cloning, backing up, or restoring disks. Fixed the issue that folder modification timestamps were not preserved when copying files from ReFS partitions. Fixed the issue that Excel-format reports generated by features such as file copying or bad sector checking could not be opened when the report contained more than one million rows. Fixed the issue that folders were not displayed in the exclude-folder dialog box when backing up partitions to image files. Fixed the issue that the "Erase Sectors" feature could not be executed in some cases. Download: DiskGenius 6.2.0.1829 | 63.9 MB (Freeware, paid upgrade available) Download: DiskGenius Portable 64-bit | 40.0 MB Download: DiskGenius Portable 32-bit | 36.0 MB Download: DiskGenius Lite 64-bit | 13.4 MB Download: DiskGenius Lite 32-bit | 11.6 MB View: DiskGenius Home Page | DiskGenius Screenshot Get alerted to all of our Software updates on Twitter at @NeowinSoftware
    • Really? Use a better search engine https://www.google.com/search?...ourceid=chrome&ie=UTF-8
  • Recent Achievements

    • Week One Done
      agatameier earned a badge
      Week One Done
    • One Month Later
      agatameier earned a badge
      One Month Later
    • Week One Done
      ssd21345 earned a badge
      Week One Done
    • Contributor
      MarkHughes4096 went up a rank
      Contributor
    • Dedicated
      jordanspringer earned a badge
      Dedicated
  • Popular Contributors

    1. 1
      +primortal
      513
    2. 2
      +Edouard
      182
    3. 3
      PsYcHoKiLLa
      143
    4. 4
      ATLien_0
      95
    5. 5
      Steven P.
      74
  • Tell a friend

    Love Neowin? Tell a friend!