All of lore.kernel.org
 help / color / mirror / Atom feed
From: Davidlohr Bueso <dave@stgolabs.net>
To: Jason Baron <jbaron@akamai.com>
Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
	linux-fsdevel@vger.kernel.org,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Salman Qazi <sqazi@google.com>
Subject: Re: [PATCH] epoll: avoid calling ep_call_nested() from ep_poll_safewake()
Date: Sat, 28 Oct 2017 07:05:33 -0700	[thread overview]
Message-ID: <20171028140533.e3n4zpno66kyfdm3@linux-n805> (raw)
In-Reply-To: <05416148-bf19-7718-b6b4-7658b5aca2ee@akamai.com>

On Wed, 18 Oct 2017, Jason Baron wrote:

>http://lkml.iu.edu/hypermail//linux/kernel/1501.1/05905.html
>
>We can work through these ideas or others...

So, unsurprisingly, I got some _really_ good results on the epoll_wait()
benchmark by removing the readywalk list altogether -- something like
4000% in some cases. It's also survived more testing, although I'm still
waiting for customer confirmation on his real workload, which helps
further test the changes (along with this patch to move the safewake
list to debug).

Could you please resend patch 1 in the series above?

Thanks,
Davidlohr

  reply	other threads:[~2017-10-28 14:06 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-13 18:48 [PATCH] epoll: avoid calling ep_call_nested() from ep_poll_safewake() Jason Baron
2017-10-17 15:37 ` Davidlohr Bueso
2017-10-18 14:03   ` Jason Baron
2017-10-28 14:05     ` Davidlohr Bueso [this message]
2017-10-31 14:14       ` Jason Baron
2018-01-18 11:00     ` Hou Tao
2018-01-18 21:18       ` Jason Baron

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=20171028140533.e3n4zpno66kyfdm3@linux-n805 \
    --to=dave@stgolabs.net \
    --cc=akpm@linux-foundation.org \
    --cc=jbaron@akamai.com \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=sqazi@google.com \
    --cc=viro@zeniv.linux.org.uk \
    /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 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.