Date: Thu, 2 Jun 2011 17:13:51 +0200 From: Ivan Voras <ivoras@freebsd.org> To: Andriy Gapon <avg@freebsd.org> Cc: freebsd-performance@freebsd.org Subject: Re: tlb shootdown Message-ID: <BANLkTinzNUYyxxVnZN=NLNFHNsKswhBvgQ@mail.gmail.com> In-Reply-To: <4DE79D2F.8050907@FreeBSD.org> References: <4DE61E6F.1010209@FreeBSD.org> <is7u3u$jhf$1@dough.gmane.org> <4DE79D2F.8050907@FreeBSD.org>
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On 2 June 2011 16:24, Andriy Gapon <avg@freebsd.org> wrote: > on 02/06/2011 15:02 Ivan Voras said the following: >> On 01/06/2011 13:11, Andriy Gapon wrote: >>> >>> Anyone knows of a benchmark/test that can measure/demonstrate difference in tlb >>> shootdown performance (or its lack)? >> >> The "tlb" utility from lmbench may help you. > > Just because it's named tlb and I asked for tlb something? :) No, because it satisfies one thing you asked for: measuring tlb shootdown performance: ./tlb -c tlb: 16 pages 0.75218 nanoseconds If you look at the code, this is probably exactly what you need: the difference between the case with tlb misses and without.
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