From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: thibodux@gmail.com, xen-devel@lists.xenproject.org,
linux-kernel@vger.kernel.org
Cc: oleksandr_andrushchenko@epam.com, tglx@linutronix.de,
jgross@suse.com, ryan.thibodeaux@starlab.io
Subject: Re: [PATCH] x86/xen: Add "xen_timer_slop" command line option
Date: Wed, 24 Apr 2019 14:47:22 -0400 [thread overview]
Message-ID: <63b5cb73-ad62-22b3-8df3-da75d4f3e358@oracle.com> (raw)
In-Reply-To: <1553279397-130201-1-git-send-email-ryan.thibodeaux@starlab.io>
On 3/22/19 2:29 PM, thibodux@gmail.com wrote:
> From: Ryan Thibodeaux <ryan.thibodeaux@starlab.io>
>
> Add a new command-line option "xen_timer_slop=<INT>" that sets the
> minimum delta of virtual Xen timers. This commit does not change the
> default timer slop value for virtual Xen timers.
>
> Lowering the timer slop value should improve the accuracy of virtual
> timers (e.g., better process dispatch latency), but it will likely
> increase the number of virtual timer interrupts (relative to the
> original slop setting).
>
> The original timer slop value has not changed since the introduction
> of the Xen-aware Linux kernel code. This commit provides users an
> opportunity to tune timer performance given the refinements to
> hardware and the Xen event channel processing. It also mirrors
> a feature in the Xen hypervisor - the "timer_slop" Xen command line
> option.
>
> Signed-off-by: Ryan Thibodeaux <ryan.thibodeaux@starlab.io>
Applied to for-linus-5.2
prev parent reply other threads:[~2019-04-24 18:48 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-22 18:29 [PATCH] x86/xen: Add "xen_timer_slop" command line option thibodux
2019-03-22 22:10 ` Boris Ostrovsky
2019-03-23 2:58 ` Dario Faggioli
2019-03-23 10:41 ` luca abeni
2019-03-25 12:05 ` luca abeni
2019-03-25 13:43 ` Boris Ostrovsky
2019-03-25 14:07 ` luca abeni
2019-03-25 14:11 ` Ryan Thibodeaux
2019-03-25 17:36 ` Ryan Thibodeaux
2019-03-25 18:31 ` Boris Ostrovsky
2019-03-26 9:13 ` Dario Faggioli
2019-03-26 11:12 ` luca abeni
2019-03-26 11:41 ` Ryan Thibodeaux
2019-03-26 23:21 ` Boris Ostrovsky
2019-03-27 10:00 ` Ryan Thibodeaux
2019-03-27 14:46 ` Boris Ostrovsky
2019-03-27 14:59 ` Ryan Thibodeaux
2019-03-27 15:19 ` Dario Faggioli
2019-03-23 12:00 ` Ryan Thibodeaux
2019-03-24 18:07 ` Boris Ostrovsky
2019-03-25 10:36 ` Dario Faggioli
2019-04-24 18:47 ` Boris Ostrovsky [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=63b5cb73-ad62-22b3-8df3-da75d4f3e358@oracle.com \
--to=boris.ostrovsky@oracle.com \
--cc=jgross@suse.com \
--cc=linux-kernel@vger.kernel.org \
--cc=oleksandr_andrushchenko@epam.com \
--cc=ryan.thibodeaux@starlab.io \
--cc=tglx@linutronix.de \
--cc=thibodux@gmail.com \
--cc=xen-devel@lists.xenproject.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).