Date: Mon, 9 Oct 2006 01:23:45 +0200 From: "Attilio Rao" <attilio@freebsd.org> To: "Kip Macy" <kmacy@fsmware.com>, "John-Mark Gurney" <gurney_j@resnet.uoregon.edu>, "David Xu" <davidxu@freebsd.org>, freebsd-current@freebsd.org, "Ivan Voras" <ivoras@fer.hr> Subject: Re: [PATCH] MAXCPU alterable in kernel config - needs testers Message-ID: <3bbf2fe10610081623l7f64651bya635f612273f730d@mail.gmail.com> In-Reply-To: <20061008160742.N29803@demos.bsdclusters.com> References: <2fd864e0610080423q7ba6bdeal656a223e662a5d@mail.gmail.com> <20061008135031.G83537@demos.bsdclusters.com> <4529667D.8070108@fer.hr> <200610090634.31297.davidxu@freebsd.org> <20061008225150.GK793@funkthat.com> <3bbf2fe10610081555r67265368sf7f12edbf35bff0d@mail.gmail.com> <20061008155817.G29803@demos.bsdclusters.com> <3bbf2fe10610081603r1161ac38h4b679e452b6849f6@mail.gmail.com> <20061008160742.N29803@demos.bsdclusters.com>
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2006/10/9, Kip Macy <kmacy@fsmware.com>: > In my own tree I have support for profiling all kernel locks (sx, > lockmgr, spin mutexes, and blocking mutexes - not just the current > profiling for blocking mutexes) which I'll commit after sun4v has > been completely checked in. > > The biggest offenders on the workloads I've looked at are the > lockmgr locks in VFS, user_map (sx) in VM, and sched_lock (spin). > > Substantial effort will be needed to make FreeBSD scale well past 4 > cpus. Would you be interested in this: perforce.freebsd.org://depot/user/attilio/attilio_smpng/... Attilio -- Peace can only be achieved by understanding - A. Einstein
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