Date: Tue, 24 Jul 2012 15:07:52 -0700 From: Jack Vogel <jfvogel@gmail.com> To: Luigi Rizzo <rizzo@iet.unipi.it> Cc: current@freebsd.org Subject: Re: RFC: use EM_LEGACY_IRQ in if_lem.c ? Message-ID: <CAFOYbcnETntWY%2BESPB8x0BRF7Uqc7XG=EOurY5axFEkm1dwVBw@mail.gmail.com> In-Reply-To: <20120724202019.GA22927@onelab2.iet.unipi.it> References: <20120724202019.GA22927@onelab2.iet.unipi.it>
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Interesting, lem is all the non-pcie hardware, and if you see better performance out of the LEGACY path then I'm OK with changing the default. Jack On Tue, Jul 24, 2012 at 1:20 PM, Luigi Rizzo <rizzo@iet.unipi.it> wrote: > if_lem.c ("lem", one of the e1000 drivers) has 2 possible interrupt modes: > EM_LEGACY_IRQ uses the standard dispatch mechanism, whereas > FAST_INTR has a custom handler that signals a taskqueue to do the job. > > I have no idea which actual hardware uses it (all of my Intel 1G > cards use either "em" or "igb"), but "lem" is the driver used in > qemu, and there the EM_LEGACY_IRQ gives approx 10% higher packet > rates than the other. > > Any objections if i change the default to EM_LEGACY_IRQ ? > > cheers > luigi > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" >
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