Messages in this thread | | | Date | Mon, 24 May 2004 03:37:01 +0200 (CEST) | From | "Robert M. Stockmann" <> | Subject | Re: Help understanding slow down |
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Hi Phy,
Could you also give the uname -a output of both the 2.4.x and the 2.6.x kernels ? And also mention which make options you use ? :
make : 1 thread , load is around 1.00 make -j 2 : 2 theads , load is around 2.00 make -j 4 : 4 theads , load is around 4.00
# uname -a (dual-Xeon SMP machine) Linux jackson.stokkie.net 2.4.23abi #1 SMP Sun Jan 25 03:28:48 CET 2004 i686 unknown unknown GNU/Linux ^^^^
# uname -a (poor PII 400 MHz machine) Linux tapebox.stokkie.net 2.6.6 #1 Thu May 13 05:48:57 CEST 2004 i686 unknown unknown GNU/Linux ^^^ no SMP
Also , is your Opteron machine rather different as the mainstream Opteron boards, i.e. are there some exotic drivers used ?
Regards,
Robert
> Just for more clarification, here is a perfect > example: > > 2.6.7-p1: > 24.86user 51.77system 2:58.87elapsed 42%CPU > (0avgtext+0avgdata 0maxresident)k > 0inputs+0outputs (13major+7591686minor)pagefaults > 0swaps > > 2.4.21: > 28.68user 34.98system 1:12.34elapsed 87%CPU > (0avgtext+0avgdata 0maxresident)k > 0inputs+0outputs (5691267major+1130523minor)pagefaults > 0swaps > > > Both runs on the same machine with the same process > (making headers). > > Could someone give me some pointers/directions on > where to look. > > Thank you for your time. > Phy > > --- Phy Prabab <phyprabab@xxxxxxxxx> wrote: >> Hello, >> >> I need some help understanding what is at issue with >> the extreme lsow down in build times for a custom >> executable on different kernel versions. The >> difference is pretty huge: >> >> RH 2.4.20-13-7 : ~1m.10s >> 2.4.22 : ~1m.40s >> 2.4.26 : ~2m.15s >> 2.6.1 : ~3m.40s >> 2.6.2 : ~4m.00s >> 2.6.3 : ~4m.00s >> 2.6.6 : ~3m.15s >> 2.6.6-mm4 : ~2m.10s >> 2.6.6-mm5 : ~2m.50s >> 2.6.7-p1 : ~2m.80s >> (ran five times on every kernel to get approximate >> time listed) >> >> The question is, how can I get the newer kernels to >> scream like the older kernels? >> >> I have moved all files in question to the local disk >> to rule out network issues (though the 2.6.x kernels >> are faster at net access). I have run the make >> command in debug mode and find no differnce betHz >> w/8G >> RAM. >> >> Thank you for your assistance. >> Phy >> >> __________________________________ >> Do you Yahoo!? >> Yahoo! Domains ? Claim yours for only $14.70/year >> http://smallbusiness.promotions.yahoo.com/offer
Robert M. Stockmann - RHCE Network Engineer - UNIX/Linux Specialist crashrecovery.org stock@stokkie.net
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