netdev - RE: [RFC PATCH net-next 0/6] implement kthread based napi poll

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

Message-ID: <4600c4617b4b41fa8522ab2d0c8ea822@AcuMS.aculab.com>
Date:   Wed, 30 Sep 2020 08:23:15 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Jakub Kicinski' <kuba@...nel.org>, Wei Wang <weiwan@...gle.com>
CC:     Eric Dumazet <edumazet@...gle.com>,
        "David S . Miller" <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>, Paolo Abeni <pabeni@...hat.com>,
        Hannes Frederic Sowa <hannes@...essinduktion.org>,
        "Felix Fietkau" <nbd@....name>
Subject: RE: [RFC PATCH net-next 0/6] implement kthread based napi poll

From: Jakub Kicinski
> Sent: 29 September 2020 22:49
...
> Isn't the fundamental problem that scheduler works at ms scale while
> where we're talking about 100us at most? And AFAICT scheduler doesn't
> have a knob to adjust migration cost per process? :(

Have you tried setting the application processes to RT priorities?
The scheduler tries very hard (maybe too hard) to avoid migrating
RT processes.

	David

-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)