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
| ||
|
Date: Tue, 13 Jan 2015 22:21:05 +0200 From: Or Gerlitz <gerlitz.or@...il.com> To: Eric Dumazet <eric.dumazet@...il.com> Cc: Eyal Perry <eyalpe@....mellanox.co.il>, Linux Netdev List <netdev@...r.kernel.org>, Amir Vadai <amirv@...lanox.com>, Yevgeny Petrilin <yevgenyp@...lanox.com>, Saeed Mahameed <saeedm@...lanox.com>, Ido Shamay <idos@...lanox.com>, Amir Ancel <amira@...lanox.com>, Eyal Perry <eyalpe@...lanox.com> Subject: Re: BW regression after "tcp: refine TSO autosizing" On Tue, Jan 13, 2015 at 8:57 PM, Eric Dumazet <eric.dumazet@...il.com> wrote: > On Tue, 2015-01-13 at 18:48 +0200, Eyal Perry wrote: >> Hello Eric, >> Lately we've observed performance degradation in BW of about 30-40% (depends on >> the setup we use). >> I've bisected the issue down to the this commit: 605ad7f1 ("tcp: refine TSO >> autosizing") >> >> For instance, I was running the following test: >> 1. Bounding net device' irqs to core 0 for both client and server side >> 2. Running netperf with 64K massage size (used the following command) >> $ netperf -H remote -T 1,1 -l 100 -t TCP_STREAM -- -k THROUGHPUT -M 65536 -m 65536 >> >> I ran the test on upstream net-next including your patch and than reverted it >> and these are the results I got was improvement from 14.6Gbps to 22.1Gbps. >> >> an additional difference I've noticed when inspecting the ethtool statics, >> number of xmit_more packets increased from 4 to 160 with the reverted kernel. >> >> We are investigating this issue, do you have a hint? > > Which driver are you using for this test ? AFAIK, mlx4 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists