Date: Fri, 27 Mar 2009 20:02:32 +0530 From: Prashant Vaibhav <prashant.vaibhav@gmail.com> To: Eugene Grosbein <eugen@kuzbass.ru> Cc: freebsd-current@freebsd.org Subject: Re: Improving the kernel/i386 timecounter performance (GSoC proposal) Message-ID: <17560ccf0903270732x23970ad4j42c81511a97a1ce8@mail.gmail.com> In-Reply-To: <49CCDD7D.FA83BF14@kuzbass.ru> References: <17560ccf0903260551v1f5cba9eu87727c0bae7baa3@mail.gmail.com> <49CCDD7D.FA83BF14@kuzbass.ru>
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Eugene, No I am not. Looking at it now. I'm not familiar with a lot of things specific to the freebsd kernel actually, but familiar with tsc/timing stuff in general and xnu in particular. After seeing this in the gsoc ideas list I decided to apply, assuming it would map well to freebsd too. Best, Prashant 2009/3/27 Eugene Grosbein <eugen@kuzbass.ru> > Prashant Vaibhav wrote: > > > The primary idea is to improve the performance and resolution of > > gettimeofday() and friends by creating a efficient userspace > implementation > > of these functions, along with some supporting modifications to the > kernel. > > Are you aware of CLOCK_*_FAST family of timecounters present > in FreeBSD 7.x? If not, you may want to take a look: > > http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/sys/time.h#rev1.71 > > Eugene Grosbein >
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