Date: Thu, 24 Jan 2008 12:43:55 +0200 From: Stefan Lambrev <stefan.lambrev@moneybookers.com> To: Kris Kennaway <kris@FreeBSD.org> Cc: freebsd-hackers@FreeBSD.org Subject: Re: gettimeofday() in hping Message-ID: <47986BEB.4040201@moneybookers.com> In-Reply-To: <47979264.2020808@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> <47965072.7030700@moneybookers.com> <47965112.5020009@FreeBSD.org> <4797265A.3020409@moneybookers.com> <47979264.2020808@FreeBSD.org>
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Hi Kris, Kris Kennaway wrote: > Stefan Lambrev wrote: >> Hi Kris, >> >> Kris Kennaway wrote: >>> Stefan Lambrev wrote: >>>> >>>> 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 >> I got hwpmc to compile (but only as module) >> hwpmc: TSC/1/0x20<REA> P6/2/0x1ff<INT,USR,SYS,EDG,THR,REA,WRI,INV,QUA> >> but when I try to use pmcstat I receive this error message: >> pmcstat: ERROR: Initialization of the pmc(3) library failed: Device >> not configured >> >> kldstat lists hwpmc.ko as loaded and I have options HWPMC_HOOKS in my >> kernel. >> >> Any idea what's go wrong? >> > > You also need changes to the userland libpmc and pmcstat. They should > also be in that (or related) p4 changeset though. Those are the files that I fetched from p4 /usr/src/lib/libpmc/libpmc.c - rev2 /usr/src/sys/amd64/include/pmc_mdep.h rev2 /usr/src/sys/dev/hwpmc/hwpmc_x86.c rev2 /usr/src/sys/modules/hwpmc/Makefile rev3 but I rebuild only kernel - I'll try to rebuild everything :) do you think this will help getting hwpmc working? Btw I have hwpmc working on other machine (it's with FreeBSD 6.3-prerelease). Can you tell me what stats exactly you need from running hping? -- Best Wishes, Stefan Lambrev ICQ# 24134177
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