Date: Wed, 25 Jan 2006 11:45:44 +0100 From: Alexander Leidinger <Alexander@Leidinger.net> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: arch@freebsd.org, current@freebsd.org Subject: Re: [TEST/REVIEW] CPU accounting patches Message-ID: <20060125114544.edawx42obkkos0ck@netchild.homeip.net> In-Reply-To: <28985.1138184101@critter.freebsd.dk> References: <28985.1138184101@critter.freebsd.dk>
next in thread | previous in thread | raw e-mail | index | archive | help
Poul-Henning Kamp <phk@phk.freebsd.dk> wrote: > In message <20060125110927.dabpg50ls8o8gg4k@netchild.homeip.net>, > Alexander Lei > dinger writes: > >> Are you going to fix those issues for machines which do power saving tricks >> (which may even be useful on servers for some people, not only on laptops), >> or do you not intend to further work on this besides the patches you present >> here? > > My plan is to add some code to measure and record the maximum "cpu_tick" > frequency we see, and use that to normalize the cpu accounting. > > That way, the user/system time reported will get units of "cpu seconds > if the cpu ran full speed". How large do you expect the error will be? Bye, Alexander. -- http://www.Leidinger.net Alexander @ Leidinger.net: PGP ID = B0063FE7 http://www.FreeBSD.org netchild @ FreeBSD.org : PGP ID = 72077137 Eternity is a terrible thought. I mean, where's it going to end? -- Tom Stoppard
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20060125114544.edawx42obkkos0ck>