linux-kernel - Re: Context switch latency in tickless isolated CPU

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: <CANv7uPRh4RiSXwpRsOooNAJumMj2TmiRc3Qq5_kwzf9SetE_FA@mail.gmail.com>
Date:   Sun, 21 Aug 2016 19:26:04 +0800
From:   GeHao Kang <kanghao0928@...il.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Chris Metcalf <cmetcalf@...lanox.com>,
        Frédéric Weisbecker <fweisbec@...il.com>,
        linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
        tglx@...utronix.de, mingo@...nel.org,
        Paul McKenney <paulmck@...ux.vnet.ibm.com>
Subject: Re: Context switch latency in tickless isolated CPU

On Fri, Aug 19, 2016 at 8:34 PM, Peter Zijlstra <peterz@...radead.org> wrote:

> Why are you wanting to use nohz_full if you do syscalls?

We hope to reduce the overhead of the tick while the real time
applications run,
and these applications might do some syscalls to operate the I/O devices like
EtherCAT.