Date: Fri, 27 Mar 2015 16:29:31 -0400 (EDT) From: Daniel Eischen <deischen@freebsd.org> To: Eric van Gyzen <vangyzen@FreeBSD.org> Cc: current@FreeBSD.org Subject: Re: SSE in libthr Message-ID: <Pine.GSO.4.64.1503271627360.6584@sea.ntplx.net> In-Reply-To: <5515AED9.8040408@FreeBSD.org> References: <5515AED9.8040408@FreeBSD.org>
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On Fri, 27 Mar 2015, Eric van Gyzen wrote: > In a nutshell: > > Clang emits SSE instructions on amd64 in the common path of > pthread_mutex_unlock. This reduces performance by a non-trivial amount. I'd > like to disable SSE in libthr. This makes sense to me. -- DE
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