Date: Wed, 11 Feb 2009 17:33:53 +1100 From: Antony Mawer <fbsd-performance@mawer.org> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-performance@freebsd.org Subject: Re: FreeBSD 7.1 disk performance issue on ESXi 3.5 Message-ID: <49927151.2030100@mawer.org> In-Reply-To: <gms3sl$ctv$1@ger.gmane.org> References: <499165F3.6050803@sebster.com> <gms1i4$3vq$1@ger.gmane.org> <49918DA6.4020608@sebster.com> <49918E0A.1060500@sebster.com> <gms3sl$ctv$1@ger.gmane.org>
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Ivan Voras wrote: > Sebastiaan van Erk wrote: >> Sebastiaan van Erk wrote: >>> (However, just to give you an idea I attached the basic 5.1.2 >>> unixbench outputs (the CPU info for FreeBSD is "fake", since unixbench >>> does a cat /proc/cpuinfo, so I removed the /proc/ part and copied the >>> output under linux to the "procinfo" file.) > ... benchmark results snipped ... > > The results are ... interesting. It seems that FreeBSD simply dies in > any test having a high context switch rate. Hmmm, this looks familiar. > Either I or a collegue of mine had a similar situation some time ago, > with the same discrepancy in disk speeds and the same difference in > context switches. Unfortunately, there was no solution. How would one go about gathering data on such a scenario to help improve this? We were planning a project involving VMware deployments with FreeBSD 7.1 systems in the near future, but if performance is that bad it is likely to be a show stopper. Where do we start looking and who should we be talking to? -- Antony
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