Date: Thu, 20 May 2010 19:19:47 +0700 From: Eugene Grosbein <eugen@grosbein.pp.ru> To: rihad <rihad@mail.ru> Cc: freebsd-net@freebsd.org Subject: Re: increasing em(4) buffer sizes Message-ID: <4BF528E3.7020502@grosbein.pp.ru> In-Reply-To: <4BF4D152.8030005@mail.ru> References: <4BF4252F.8000208@mail.ru> <20100519190505.GA29133@rdtc.ru> <4BF4BBB2.8030806@mail.ru> <4BF4C676.8010709@grosbein.pp.ru> <4BF4D152.8030005@mail.ru>
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On 20.05.2010 13:06, rihad wrote: >>>> Some more useful tunnables for loader.conf: >>>> >>>> dev.em.0.rx_int_delay=200 >>>> dev.em.0.tx_int_delay=200 >>>> dev.em.0.rx_abs_int_delay=200 >>>> dev.em.0.tx_abs_int_delay=200 >>>> dev.em.0.rx_processing_limit=-1 >>>> >>> So this interrupt delay is the much talked about interrupt moderation? >>> Thanks, I'll try them. Is there any risk the machine won't boot with >>> them if rebooted remotely? >> >> Yes, for hw.em.rxd/hw.em.txd only. em interfaces will not function >> if you set these two too high for your nic chip, so read man em >> and mentioned Intel document carefully. >> >> It's pretty safe to play with other tunnables. >> > Can I even set the mentioned dev.em.0.* settings on a live system > remotely? You seem to also have an em card, have you tried doing that? Yes, it is permitted.
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