Messages in this thread |  | | Date | Wed, 8 Nov 2000 12:17:32 -0700 | From | "Jeff V. Merkey" <> | Subject | Re: Dual XEON - >>SLOW<< on SMP |
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On Wed, Nov 08, 2000 at 09:28:54AM -0500, Richard B. Johnson wrote: > On Tue, 7 Nov 2000, Jeff V. Merkey wrote: > > > > > Marc Lehman verified that PII systems will generate tons of AGIs with > > gcc. Perhaps this is the cause of this problem. You could run EMON and > > see if there is something obvious in the numbers ... > > > > Jeff > > > > Here are some tests: > > Before the tests, I do: > `ifconfig eth0 down` > `kill -TERM -1` > > Then I disconnect my ethernet cable to get rid of those interrupts. > > > This is the test-script: > make clean > time make -j 10 bzImage > > It is executed as `sh test.sh &>World.Log &` . > > > This is Linux 2.4.0-test9 > > This is a kernel build with NMI watchdog turned OFF: > 349.04user 19.83system 3:21.96elapsed 182%CPU (0avgtext+0avgdata 0maxresident)k > 0inputs+0outputs (0major+0minor)pagefaults 0swaps > > > This is a kernel build with NMI watchdog turned ON: > 348.23user 18.84system 3:57.14elapsed 154%CPU (0avgtext+0avgdata 0maxresident)k > 0inputs+0outputs (0major+0minor)pagefaults 0swaps > > The elapsed time went from 3:21 to 3:57. > > > This is Linux 2.2.17 > > This is the kernel build (the exact same build as above). > 214.91user 12.93system 2:37.00elapsed 145%CPU (0avgtext+0avgdata 0maxresident)k > 0inputs+0outputs (0major+0minor)pagefaults 0swaps > > The original elapsed time when booting 2.2.17 was 2:37. It is now 3:57. > > This is, in every case, rebuilding the exact same kernel. > > It doth appearith asthough ithsucks. >
I'll attempt to reproduce. I've got live internet servers running on 2.2.18-19 and am not seeing this.
Jeff
> > Cheers, > Dick Johnson > > Penguin : Linux version 2.4.0 on an i686 machine (799.54 BogoMips). > > "Memory is like gasoline. You use it up when you are running. Of > course you get it all back when you reboot..."; Actual explanation > obtained from the Micro$oft help desk. > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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