From: Craig Ringer <craig@2ndquadrant.com>
To: "Frank Ch. Eigler" <fche@elastic.org>
Cc: systemtap@sourceware.org, lwn@lwn.net, linux-kernel@vger.kernel.org
Subject: Re: systemtap release 4.4
Date: Thu, 10 Dec 2020 11:55:00 +0800 [thread overview]
Message-ID: <CAMsr+YFOdKbOm79Fx31E6gW5+R8X5VmsG_Sn4rh=tUV27CTmJQ@mail.gmail.com> (raw)
In-Reply-To: <20201110033730.GB87630@elastic.org>
On Tue, 10 Nov 2020 at 11:37, Frank Ch. Eigler via Systemtap <
systemtap@sourceware.org> wrote:
> - The locks required to protect concurrent access to global variables
> has been optimized with a "pushdown" algorithm, so that they span
> the smallest possible critical region. Formerly, and with
> --compatible=4.3, locks always spanned the entire probe handler.
> Lock pushdown means much greater potential concurrency between
> probes running on different CPUs.
>
Wow. That's amazing.
Thankyou.
--
Craig Ringer http://www.2ndQuadrant.com/
2ndQuadrant - PostgreSQL Solutions for the Enterprise
prev parent reply other threads:[~2020-12-10 3:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-10 3:37 Frank Ch. Eigler
2020-12-10 3:55 ` Craig Ringer [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='CAMsr+YFOdKbOm79Fx31E6gW5+R8X5VmsG_Sn4rh=tUV27CTmJQ@mail.gmail.com' \
--to=craig@2ndquadrant.com \
--cc=fche@elastic.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lwn@lwn.net \
--cc=systemtap@sourceware.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 read-only IMAP folder(s) and NNTP newsgroup(s).