Date: Wed, 01 Apr 2015 22:52:18 +0200 From: Tobias Oberstein <tobias.oberstein@gmail.com> To: Jim Harris <jim.harris@gmail.com>, Alan Somers <asomers@freebsd.org> Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>, Michael Fuckner <michael@fuckner.net>, Konstantin Belousov <kib@freebsd.org> Subject: Re: NVMe performance 4x slower than expected Message-ID: <551C5A82.2090306@gmail.com> In-Reply-To: <CAJP=Hc-RNVuhPePg7bnpmT4ByzyXs_CNvAs7Oy7ntXjqhZYhCQ@mail.gmail.com> References: <551BC57D.5070101@gmail.com> <CAOtMX2jVwMHSnQfphAF%2Ba2%2Bo7eLp62nHmUo4t%2BEahrXLWReaFQ@mail.gmail.com> <CAJP=Hc-RNVuhPePg7bnpmT4ByzyXs_CNvAs7Oy7ntXjqhZYhCQ@mail.gmail.com>
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> > FreeBSD 11 Current with patches (DMAR and ZFS patches, otherwise the box > > doesn't boot at all .. because of 3TB RAM and the amount of periphery). > > Do you still have WITNESS and INVARIANTS turned on in your kernel > config? They're turned on by default for Current, but they do have > some performance impact. To turn them off, just build a > GENERIC-NODEBUG kernel . WITNESS is off, INVARIANTS is still on. Here is complete config: https://github.com/oberstet/scratchbox/blob/master/freebsd/cruncher/results/freebsd_kernel_conf.md This is the aggregated patch (work was done by Konstantin - thanks again btw!) https://github.com/oberstet/scratchbox/blob/master/freebsd/cruncher/results/freebsd_patch.md > Could you also post full dmesg output as well as vmstat -i? dmesg: https://github.com/oberstet/scratchbox/blob/master/freebsd/cruncher/results/freebsd_dmesg.md vmstat: https://github.com/oberstet/scratchbox/blob/master/freebsd/cruncher/results/freebsd_vmstat.md === Here are results from FIO under FreeBSD: https://github.com/oberstet/scratchbox/blob/master/freebsd/cruncher/results/freebsd.md Here are results using _same_ FIO control file under Linux: https://github.com/oberstet/scratchbox/blob/master/freebsd/cruncher/results/linux.md === The firmware for the P3700 cards was updated to the very latest as of today (using isdct under Linux). /Tobias
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