Date: Mon, 15 Oct 2012 11:08:09 -0400 From: John Baldwin <jhb@freebsd.org> To: Rick Macklem <rmacklem@uoguelph.ca> Cc: Nikolay Denev <ndenev@gmail.com>, Garrett Wollman <wollman@freebsd.org>, FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: NFS server bottlenecks Message-ID: <201210151108.09113.jhb@freebsd.org> In-Reply-To: <611092759.2189637.1350133402953.JavaMail.root@erie.cs.uoguelph.ca> References: <611092759.2189637.1350133402953.JavaMail.root@erie.cs.uoguelph.ca>
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On Saturday, October 13, 2012 9:03:22 am Rick Macklem wrote: > rick > ps: I hope John doesn't mind being added to the cc list yet again. It's > just that I suspect he knows a fair bit about mutex implementation > and possible hardware cache line effects. Currently mtx_pool just uses a simple array (I have patches to force the array members to be cache-aligned, but they haven't been shown to help in any benchmarks to date). I do think though that I would prefer embedding the mutexes in the hash table entries directly. This is what we do for the turnstile and sleep queue hash tables. -- John Baldwin
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