Date: Tue, 16 Sep 2008 22:43:25 +0800 From: "Jian Qiu" <swordqiu@gmail.com> To: "Kris Kennaway" <kris@freebsd.org> Cc: freebsd-net@freebsd.org Subject: Re: What's the status of parallel netisr? Message-ID: <e8520310809160743v46b5cf18jd78f6043eaeccaa3@mail.gmail.com> In-Reply-To: <48CF6450.6020909@FreeBSD.org> References: <e8520310809151020j29b8870v3167cb2879e8543d@mail.gmail.com> <48CF6450.6020909@FreeBSD.org>
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Interesting. I did a test on local UDP throughput. I was surprised to find out the performance with a SMP kernel was worse than UP. (~74MB/s v.s. 96 MB/s). I had though parallel netisr might be a solution. Anyway, thanks for the info. On Tue, Sep 16, 2008 at 3:46 PM, Kris Kennaway <kris@freebsd.org> wrote: > Jian Qiu wrote: >> >> I noticed there was a project trying to parallelize netisr in SMP. >> >> But I cannot find the relevant codes in either stable 7 or current 8. >> >> I'm wondering what's the current status of this project? >> >> When will it be merged into FreeBSD source tree? > > It's available in a perforce branch owned by rwatson (sorry, I don't have > the branch name handy), but in my tests it either produced no benefits, or > actually reduced performance. This is surprising and the reasons for this > are still unknown. > > Kris >
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