linux-kernel - e1000 1sec latency problem

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 7 Feb 2008 15:17:18 +0100
From:	Pavel Machek <pavel@....cz>
To:	kernel list <linux-kernel@...r.kernel.org>,
	e1000-devel@...ts.sourceforge.net, john.ronciak@...el.com,
	jeffrey.t.kirsher@...el.com, jesse.brandeburg@...el.com,
	auke-jan.h.kok@...el.com
Subject: e1000 1sec latency problem

Hi!

I have the famous e1000 latency problems:

64 bytes from 195.113.31.123: icmp_seq=68 ttl=56 time=351.9 ms
64 bytes from 195.113.31.123: icmp_seq=69 ttl=56 time=209.2 ms
64 bytes from 195.113.31.123: icmp_seq=70 ttl=56 time=1004.1 ms
64 bytes from 195.113.31.123: icmp_seq=71 ttl=56 time=308.9 ms
64 bytes from 195.113.31.123: icmp_seq=72 ttl=56 time=305.4 ms
64 bytes from 195.113.31.123: icmp_seq=73 ttl=56 time=9.8 ms
64 bytes from 195.113.31.123: icmp_seq=74 ttl=56 time=3.7 ms

...and they are still there in 2.6.25-git0. I had ethernet EEPROM
checksum problems, which I fixed by the update, but problems are not
gone.

irqpoll helps.

nosmp (which implies XT-PIC is being used) does not help.

 16:       1925          0   IO-APIC-fasteoi   ahci, yenta, uhci_hcd:usb2, eth0

Booting kernel with nosmp/ no yenta, no usb does not help.

Hmm, as expected, interrupt load on ahci (find /) makes latencies go
away.

It should be easily reproducible on x60 with latest bios, it is 100%
reproducible for me...
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/