ULE/SCHED_SMP diff for 7.0
Garrett Cooper
youshi10 at u.washington.edu
Tue Jul 17 09:40:05 UTC 2007
Claus Guttesen wrote:
>> http://people.freebsd.org/~jeff/ule.diff
>>
>> This patch is scheduled for inclusion in 7.0. I would like anyone who
>> cares to run it to validate that it does not create any stability or
>> performance regression over the existing ULE. This patch replaces ULE
>> with SCHED_SMP, which will now no longer exist as a seperate fork of
>> ULE.
>
> Applied the patch and tried to compile new kernel. However I get:
>
> julie/usr/src#>time make -j 3 buildkernel
> --------------------------------------------------------------
>>>> Kernel build for WEBSRV started on Tue Jul 17 10:56:34 CEST 2007
> --------------------------------------------------------------
> ===> WEBSRV
> mkdir -p /usr/obj/usr/src/sys
> --------------------------------------------------------------
>>>> stage 1: configuring the kernel
> --------------------------------------------------------------
> cd /usr/src/sys/amd64/conf;
> PATH=/usr/obj/usr/src/tmp/legacy/usr/sbin:/usr/obj/usr/src/tmp/legacy/usr/bin:/usr/obj/usr/src/tmp/legacy/usr/games:/usr/obj/usr/src/tmp/usr/sbin:/usr/obj/usr/src/tmp/usr/bin:/usr/obj/usr/src/tmp/usr/games:/sbin:/bin:/usr/sbin:/usr/bin
>
> config -d /usr/obj/usr/src/sys/WEBSRV
> /usr/src/sys/amd64/conf/WEBSRV
> /usr/src/sys/amd64/conf/WEBSRV: unknown option "SCHED_SMP"
> *** Error code 1
> 1 error
> *** Error code 2
> 1 error
> make -j 3 buildkernel 0.06s user 0.04s system 101% cpu 0.101 total
>
> I have
>
> options SCHED_SMP # Newer SMP scheduler
>
> in my kernel.
>
> Hunk succeeded everytime, src is from last week.
>
Excellent work Jeff (with note to whoever modified the fs code as
well)! My fat program seems to have survived 4 complete iterations of 1
million reads and writes, all without issue, with my printf statements
that appeared to have stimulated a race condition at ~90k reads and
writes before.
I'll let it run overnight to completion (another 46 tries), and let
you know how it goes :)..
System is a UP amd64 capable VMware host.
Thanks,
-Garrett
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