From: Grygorii Strashko <grygorii.strashko@ti.com>
To: "Hindman, Gavin" <gavin.hindman@intel.com>,
linux-rt-users <linux-rt-users@vger.kernel.org>
Subject: Re: Kernel config options that impact latency
Date: Fri, 12 Jan 2018 14:01:40 -0600 [thread overview]
Message-ID: <dad7630d-e2f5-c966-d3fa-9a8124648ae8@ti.com> (raw)
In-Reply-To: <D5D6254030DBC644B6EE58B333BFBB1E9D96DC30@ORSMSX101.amr.corp.intel.com>
On 01/04/2018 12:29 PM, Hindman, Gavin wrote:
> Since we seem to be in knowledge-sharing mode, is there an existing list of kernel config parameters,
outside of those required to enable preempt_rt, known to impact or improve general system latency?
I didn't find anything prowling the various wikis.
>
You can pay attention on
CONFIG_RCU_BOOST
CONFIG_RCU_NOCB_xxx
Also, as mentioned, disabling PM, especially CPU PM is helpful.
CONFIG_CPU_IDLE=n
CONFIG_CPU_FREQ=n
Note. you can also use CONFIG_GENERIC_IDLE_POLL_SETUP
and "nohlt" command line parameter, but you might hit overheating ;)
!!! And, of course, disable most of debug options unless you really need them.
--
regards,
-grygorii
prev parent reply other threads:[~2018-01-12 20:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-04 18:29 Kernel config options that impact latency Hindman, Gavin
2018-01-04 19:24 ` Austin Schuh
2018-01-05 10:09 ` Tim Sander
2018-01-04 19:37 ` Nicholas Mc Guire
2018-02-01 18:40 ` Reinette Chatre
2018-01-12 20:01 ` Grygorii Strashko [this message]
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