All of
 help / color / mirror / Atom feed
From: Dmitry Sychov <>
Subject: Any performance gains from using per thread(thread local) urings?
Date: Tue, 12 May 2020 23:20:57 +0300	[thread overview]
Message-ID: <> (raw)


I'am writing a small web + embedded database application taking
advantage of the multicore performance of the latest AMD Epyc (up to
128 threads/CPU).

Is there any performance advantage of using per thread uring setups?
Such as every thread will own its unique sq+cq.

My feeling is there are no gains since internally, in Linux kernel,
the uring system is represented as a single queue pickup thread
anyway(?) and sharing a one pair of sq+cq (through exclusive locks)
via all threads would be enough to achieve maximum throughput.

I want to squeeze the max performance out of uring in multi threading
clients <-> server environment, where the max number of threads is
always bounded by the max number of CPUs cores.

Regards, Dmitry

             reply	other threads:[~2020-05-12 20:21 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-12 20:20 Dmitry Sychov [this message]
2020-05-13  6:07 ` H. de Vries
2020-05-13 11:01   ` Dmitry Sychov
2020-05-13 11:56     ` Mark Papadakis
2020-05-13 13:15       ` Dmitry Sychov
2020-05-13 13:27         ` Mark Papadakis
2020-05-13 13:48           ` Dmitry Sychov
2020-05-13 14:12           ` Sergiy Yevtushenko
     [not found]           ` <>
2020-05-13 14:22             ` Dmitry Sychov
2020-05-13 14:31               ` Dmitry Sychov
2020-05-13 16:02               ` Pavel Begunkov
2020-05-13 19:23                 ` Dmitry Sychov
2020-05-14 10:06                   ` Pavel Begunkov
2020-05-14 11:35                     ` Dmitry Sychov

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:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='' \ \ \
    --subject='Re: Any performance gains from using per thread(thread local) urings?' \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.