Date: Wed, 7 Nov 2007 11:30:40 -0800 From: "Jack Vogel" <jfvogel@gmail.com> To: "Igor Sysoev" <is@rambler-co.ru> Cc: freebsd-stable@freebsd.org Subject: Re: em driver 6.6.6 regression Message-ID: <2a41acea0711071130yc7f4baaqa110c6cf07630154@mail.gmail.com> In-Reply-To: <20071107095524.GD908@rambler-co.ru> References: <20071012121545.GA78201@rambler-co.ru> <20071107091806.GA361@rambler-co.ru> <20071107095524.GD908@rambler-co.ru>
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On 11/7/07, Igor Sysoev <is@rambler-co.ru> wrote: > On Wed, Nov 07, 2007 at 12:18:06PM +0300, Igor Sysoev wrote: > > > On Fri, Oct 12, 2007 at 04:15:46PM +0400, Igor Sysoev wrote: > > > > > Yesterday I have cvsup'ed FreeBSD on ThinkPad T42 to RELENG_6 > > > "2007.10.10.23.59.59" and have noticed lags while playing mp3 and browsing. > > > I have suspected new em driver, because there was no lags if wifi iwi0 > > > was used instead of em0 for network. So I had downgraded the em driver > > > separately to 6.2.9 version, have build a kernel loadable module, and have > > > loaded it instead of the 6.6.6 module, and the lags have disappeared. > > > > > > The lags appeares only if browser (Firefox, Opera) does several requests: > > > main page, js, images. There are no lags if browser reload simple page. > > > Also, I could not reproduce lags by other network traffic: pings, ssh, scp, > > > downloading files. There are no lags if I compile and so on. > > > > > > Some additional info: > > > > > > The shared irq11 is used by pcm0, em0, iwi0, CardBus, USB, and acpi_video0. > > > > > > em0@pci2:1:0: class=0x020000 card=0x05491014 chip=0x101e8086 rev=0x03 hdr=0x00 > > > vendor = 'Intel Corporation' > > > device = '82540EP Gigabit Ethernet Controller (Mobile)' > > > > I just cvsup'ed to the new em 6.7.2 version without FAST interrupt and > > lags in sound and USB mouse has gone. Thank you. > > However, if I define EM_FAST_IRQ, then lags appear again. So don't define it, thats why I did this :) If you have a server class machine with MSI or MSIX then I would try turning FAST on, but if not leave it set for what works. Cheers, Jack
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