Date: Sat, 20 Nov 2004 20:00:50 -0600 From: Dan Nelson <dnelson@allantgroup.com> To: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> Cc: Jeremie Le Hen <jeremie@le-hen.org> Subject: Re: interrupt moderation for if_* [was: serious networking (em) ...] Message-ID: <20041121020050.GB94473@dan.emsphone.com> In-Reply-To: <Pine.BSF.4.53.0411201049100.42526@e0-0.zab2.int.zabbadoz.net> References: <20041119114233.C43B.SHINO@fornext.org> <20041119185315.C43D.SHINO@fornext.org> <20041119120102.GM69710@obiwan.tataz.chchile.org> <Pine.BSF.4.53.0411201049100.42526@e0-0.zab2.int.zabbadoz.net>
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In the last episode (Nov 20), Bjoern A. Zeeb said: > On Fri, 19 Nov 2004, Jeremie Le Hen wrote: > > > Hi, Jeremie, how is this? To disable Interrupt Moderation, > > > sysctl hw.em?.int_throttle_valve=0. > > > > Great, I would have called it "int_throttle_ceil", but that's a > > detail and my opinion is totally subjective. > > > > > However, because this patch is just made now, it is not fully tested. > > > > I'll give it a try this weekend although I won't be able to make > > performance mesurements. > > when thinking about this could there be some "global" way for > interrupt moderation; For if_sk there is this PR: > http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/41220 > > something 'unique' to all NIC drivers would be good I guess ? You need NIC support for it, just like checksum offloading. And other drivers offer more sysctls; fxp lets you choose the maximum delay and maximum packets to hold before firing an interrupt. -- Dan Nelson dnelson@allantgroup.com
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