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Re: network performance


Kris Kennaway wrote:
Yes, it is gone with 8.0. Disable the module builds because some of them like this one probably need compile fixes. If you need a subset of modules use MODULES_OVERRIDE=list (in /etc/make.conf)

Yes, kernel builds.
I'm still playing with it, but the first results shows that new kernel can handle 800k incoming packets (well may be more but I have not enough power right now to generate more packets). It still answer only to 250K-260K. I guess I'm hitting the limitation of syncache/syncookies ?
Anyway this netisr2 looks like huge improvement :)

I can't build kernel without option LOCK_PROFILING with your sources:

make -V CFILES -V SYSTEM_CFILES -V GEN_CFILES | MKDEP_CPP="cc -E" CC="cc" xargs mkdep -a -f .newdep -O2 -frename-registers -pipe -fno-strict-aliasing -march=nocona -std=c99 -g -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual -Wundef -Wno-pointer-sign -fformat-extensions -nostdinc -I. -I/usr/src/sys -I/usr/src/sys/contrib/altq -I/usr/src/sys/contrib/ipfilter -I/usr/src/sys/contrib/pf -I/usr/src/sys/dev/ath -I/usr/src/sys/contrib/ngatm -I/usr/src/sys/dev/twa -I/usr/src/sys/gnu/fs/xfs/FreeBSD -I/usr/src/sys/gnu/fs/xfs/FreeBSD/support -I/usr/src/sys/gnu/fs/xfs -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h -fno-common -finline-limit=8000 --param inline-unit-growth=100 --param large-function-growth=1000 -mcmodel=kernel -mno-red-zone -mfpmath=387 -mno-sse -mno-sse2 -mno-mmx -mno-3dnow -msoft-float -fno-asynchronous-unwind-tables -ffreestanding
In file included from /usr/src/sys/netinet/ip_output.c:47:
/usr/src/sys/sys/rwlock.h:153:2: error: #error LOCK_DEBUG not defined, include <sys/lock.h> before <sys/rwlock.h>
mkdep: compile failed
*** Error code 1

So I added #include <sys/lock.h>, rebuild kernel and tested again w/o LOCK_PROFILING, but results are the same.

I'll use again hwpmc and LOCK_PROFILING to see what's going on.
And will try the same benchmark on quad core processor as now numbers of cores/cpus matter :)


Best Wishes,
Stefan Lambrev
ICQ# 24134177

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