Date: Fri, 6 Apr 2012 14:04:00 -0400 From: Arnaud Lacombe <lacombar@gmail.com> To: Attilio Rao <attilio@freebsd.org> Cc: freebsd-performance@freebsd.org, FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: Scheduler + IPC performance on FreeBSD 7.4, 8.2, 9.0 and -CURRENT Message-ID: <CACqU3MWCCHYWc%2BTJ1XjwmfJjbFuDsYDqO7d_65sVp4deJD8A6w@mail.gmail.com> In-Reply-To: <CAJ-FndAam4mK53sdUx9vB1mUZx8eKZPzd2y_Y-DH8oO0P9=ERA@mail.gmail.com> References: <CACqU3MXOM1WOPkinxfs2YJmGbgx8-gAmUbK4L3epKPg6OpQXAw@mail.gmail.com> <CAJ-FndDFHaKBPozhkBd6DxGo6F4UCs=9YGg0uMpB_S8iJ8Om0w@mail.gmail.com> <CACqU3MV=2Whd2rWgnxzxehiRSqmi03j22U32c0gcvC%2B=zwzGKA@mail.gmail.com> <CAJ-FndAam4mK53sdUx9vB1mUZx8eKZPzd2y_Y-DH8oO0P9=ERA@mail.gmail.com>
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Hi, On Fri, Apr 6, 2012 at 1:55 PM, Attilio Rao <attilio@freebsd.org> wrote: > Il 06 aprile 2012 18:54, Arnaud Lacombe <lacombar@gmail.com> ha scritto: >> Hi, >> >> On Fri, Apr 6, 2012 at 10:58 AM, Attilio Rao <attilio@freebsd.org> wrote= : >>> Il 05 aprile 2012 19:03, Arnaud Lacombe <lacombar@gmail.com> ha scritto= : >>>> Hi folks, >>>> >>>> Over the past months, I ran on a couple of unused box the >>>> `hackbench'[HACKBENCH] benchmark used by the Linux folks for tracking >>>> down various kind of regression/improvement. `hackbench' is a >>>> scheduler + IPC test (socket xor pipe). It creates producers/consumers >>>> groups and let a variable quantity of small messages flow happily. >>>> Producers and consumers are either processes xor threads. >>>> >>>> Tested platforms were >>>> =A0- Atom D510, Intel, (incomplete) >>>> =A0- Core 2 Quad Q9560, Intel >>>> =A0- Soekris net5501, AMD (incomplete) >>>> =A0- Xeon E5645, Intel (incomplete) >>>> =A0- Xeon E5620 (dual package), Intel >>>> =A0- Xeon E5-1650 (pending completion) >>>> =A0- Vortex86, DMP >>>> >>>> Tested kernel were: >>>> =A0- FreeBSD 7.4-RELEASE >>>> =A0- FreeBSD 8.2-RELEASE >>>> =A0- FreeBSD 9.0-RC3 and FreeBSD 9.0-RELEASE >>>> =A0- FreeBSD 10-CURRENT as of r231573 >>> >>> Which means you run 10-CURRENT with all the kernel debugging options >>> on and MALLOC_DEBUG on? >>> >> I already answered that question. Namely: >> >> << >> note: rule [I] is alleviated for -CURRENT kernels, which were built >> with the same alteration made to GENERIC during the CURRENT->RELEASE >> transition (ie. WITNESS and a couple of other option disabled). >>>> >> >> this translates into the following patch (for amd64): > > Did you enable MALLOC_PRODUCTION and rebuilt libc? > Userland originates from FreeBSD 7.4-RELEASE and was not changed for any of the tests, which are exclusively focused on the kernel. Doing otherwise would mean changing too many variables. - Arnaud
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