Date: Wed, 23 Jan 2008 20:15:48 +0100 From: Kris Kennaway <kris@FreeBSD.org> To: Stefan Lambrev <stefan.lambrev@moneybookers.com> Cc: freebsd-hackers@FreeBSD.org Subject: Re: gettimeofday() in hping Message-ID: <47979264.2020808@FreeBSD.org> In-Reply-To: <4797265A.3020409@moneybookers.com> 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>
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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. Kris
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