netdev - Re: Performance comparision / qdisc / no qdisc / queueing linux kernel 4.12

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20170811161606.561b3fbb@xeon-e3>
Date:   Fri, 11 Aug 2017 16:16:06 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Paweł Staszewski <pstaszewski@...are.pl>
Cc:     netdev@...r.kernel.org
Subject: Re: Performance comparision / qdisc / no qdisc / queueing linux
 kernel 4.12

Any of the current qdisc that do rate control are single threaded.
Since bandwidth is a shared resource, the qdisc has to acquire a lock
and update cache shared data structures.

Don't expect HTB or HFSC to be free.

> 
> 4.13-rc3 have kernel panic when deleting qdisc - will try to get panic trace

Please do.