From: Christoph Lameter <cl@linux.com>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Rik van Riel <riel@redhat.com>,
lsf-pc@lists.linux-foundation.org, linux-mm@kvack.org,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Frederic Weisbecker <fweisbec@gmail.com>
Subject: Re: [Lsf-pc] [LSF/MM ATTEND] Expanding OS noise suppression
Date: Wed, 3 Dec 2014 09:32:00 -0600 (CST) [thread overview]
Message-ID: <alpine.DEB.2.11.1412030931001.2710@gentwo.org> (raw)
In-Reply-To: <547E680F.4080108@amacapital.net>
On Tue, 2 Dec 2014, Andy Lutomirski wrote:
> FWIW, context tracking for full nohz is *slow*, so it may reduce noise,
> but it dramatically increases syscall and fault overhead. This isn't
> really an mm issue, though.
In general though no syscalls are performed in critical latency sensitive
segments and the I/O is done using kernel bypass. So controlling the OS
causing hiccups becomes an important issue.
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prev parent reply other threads:[~2014-12-03 15:32 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-24 20:06 Christoph Lameter
2014-12-01 16:45 ` Christoph Lameter
2014-12-01 17:11 ` [Lsf-pc] " Rik van Riel
2014-12-01 18:22 ` Christoph Lameter
2014-12-03 1:31 ` Andy Lutomirski
2014-12-03 15:32 ` Christoph Lameter [this message]
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