CPU Optimizations

[tiagosilva29]

  Quote

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):

  Quote

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

[+John Teacake MVC]

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.

[fusi0n]

  On 23/04/2013 at 07:35, ChuckFinley said:

Running it in a VM wont be a true test but nice to see results anyway.

I will try on a Quad Core Xeon when I get home for you if that will help

[+John Teacake MVC]

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

[fusi0n]

  On 23/04/2013 at 18:20, ChuckFinley said:

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

damn.. that would be insane lol

[Karl L.]

  On 23/04/2013 at 18:20, ChuckFinley said:

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).

[Rablet]

  On 23/04/2013 at 13:55, xorangekiller said:

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? :)

  On 23/04/2013 at 21:08, xorangekiller said:

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)'?

[+John Teacake MVC]

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...

[The_Decryptor Veteran]

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

[Hardi]

real 0m29.713s
user 0m29.623s
sys 0m0.003s
-----
3.8-8.dmz.1-liquorix-amd64 #1 ZEN SMP PREEMPT
model name : AMD Athlon(tm) II X3 435 Processor
cpu MHz : 2900.000

[fusi0n]

These results are getting interesting.

[+John Teacake MVC]

Definitely massive improvements in the 3.9RC kernels.

[+John Teacake MVC]

  Quote

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

[xxxxxx.xxxxxx]

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 :/

[+John Teacake MVC]

Quite a few of you have Core 2 Duos etc (I do sat on my shelf, It served me well ha) it would be good to see if you followed my Kernel Optimization Guides if you got better results....

[n_K]

  On 22/04/2013 at 00:36, n_K said:

"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;

  Quote

# 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!

[segfault]

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\
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[tiagosilva29]

What's the difference between Funtoo and Gentoo?

[Karl L.]

  On 27/04/2013 at 16:55, n_K said:

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.

[adrynalyne]

  On 27/04/2013 at 18:19, xorangekiller said:

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.

[n_K]

Yes I'm talking about software, arch kernel VS mac darwin kernel.

[xxxxxx.xxxxxx]

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.

[n_K]

  On 27/04/2013 at 19:27, sean.ferguson said:

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? :)

[Karl L.]

  On 27/04/2013 at 19:31, n_K said:

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.

[tiagosilva29]

  On 27/04/2013 at 19:27, sean.ferguson said:

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