Date: Tue, 22 Jan 2008 22:22:10 +0200 From: Stefan Lambrev <stefan.lambrev@moneybookers.com> To: Kris Kennaway <kris@FreeBSD.org> Cc: =?UTF-8?B?RGFnLUVybGluZyBTbcO4cmdyYXY=?= <des@des.no>, freebsd-hackers@FreeBSD.org Subject: Re: gettimeofday() in hping Message-ID: <47965072.7030700@moneybookers.com> In-Reply-To: <47963911.4000002@FreeBSD.org> References: <4795CC13.7080601@moneybookers.com> <868x2i3v8d.fsf@ds4.des.no> <864pd63v2h.fsf@ds4.des.no> <4795FE54.9090606@moneybookers.com> <86lk6i0vzk.fsf@ds4.des.no> <479605E2.6070709@moneybookers.com> <479621BE.2060907@FreeBSD.org> <4796357B.9020508@moneybookers.com> <47963911.4000002@FreeBSD.org>
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Kris Kennaway wrote: > Stefan Lambrev wrote: > >>> You should use hwpmc to verify where the application is really >>> spending time, since gettimeofday doesn't seem to account for it all. >> pmc: Unknown Intel CPU. >> module_register_init: MOD_LOAD (hwpmc, 0xffffffff8029906d, >> 0xffffffff8054c500) error 78 > > OK, this is the famous problem with modern CPUs that jkoshy has > declined to work around :( There are patches for this in perforce, see > > http://perforce.freebsd.org/changeView.cgi?CH=126189 cc -c -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 -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 -Werror vers.c linking kernel.debug hwpmc_x86.o(.text+0x1a5): In function `pmc_md_initialize': /usr/src/sys/dev/hwpmc/hwpmc_x86.c:144: undefined reference to `pmc_initialize_p6' Any chance you have patches against RELENG_7_0 ? :) > >> What was the other way to do this profiling? > > No other that I have found to be useful. > >> Can ktrace help? > > Not really, it only tells you what syscalls were made. But it can also display relative timestamps (time since previous entry). Can't this be useful? > > Kris > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to > "freebsd-hackers-unsubscribe@freebsd.org" -- Best Wishes, Stefan Lambrev ICQ# 24134177
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