linux-btrfs.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Christian Rohmann <crohmann@netcologne.de>
To: Chris Murphy <lists@colorremedies.com>
Cc: "Austin S. Hemmelgarn" <ahferroin7@gmail.com>,
	linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: btrfs-progs 4.4 re-balance of RAID6 is very slow / limited to one cpu core?
Date: Wed, 10 Feb 2016 14:19:16 +0100	[thread overview]
Message-ID: <56BB38D4.6030008@netcologne.de> (raw)
In-Reply-To: <CAJCQCtTPQE+hBzaktURR1v3GtObSjH=UV806qU-RmFVomwK3GA@mail.gmail.com>

Hey btrfs-folks,


I did a bit of digging using "perf":


1)
 * "perf stat -B -p 3933 sleep 60"
 * "perf stat -e 'btrfs:*' -a sleep 60"
 -> http://fpaste.org/320718/10016145/



2)
 * perf record -e block:block_rq_issue -ag" for about 30 seconds:
 -> http://fpaste.org/320719/51101751/raw/


3)
* perf top
 -> http://fpaste.org/320720/45511028/






Regards

Christian

  parent reply	other threads:[~2016-02-10 13:19 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-22 13:38 btrfs-progs 4.4 re-balance of RAID6 is very slow / limited to one cpu core? Christian Rohmann
2016-01-22 14:51 ` Duncan
2016-01-24  2:30 ` Henk Slager
2016-01-25 11:34   ` Christian Rohmann
2016-01-25 22:13     ` Chris Murphy
     [not found]       ` <CAKZK7uxdX9UBPOKButtPjqBOdVUfHdRTimP+W34fkz1h9P+wHg@mail.gmail.com>
2016-01-26  0:44         ` Fwd: " Justin Brown
2016-01-26  5:17           ` Chris Murphy
2016-01-26  6:14             ` Chris Murphy
2016-01-26  8:54               ` Christian Rohmann
2016-01-26 19:26                 ` Chris Murphy
2016-01-26 19:27                   ` Chris Murphy
2016-01-26 19:57                   ` Austin S. Hemmelgarn
2016-01-26 20:20                     ` Chris Murphy
2016-01-27  8:48                       ` Christian Rohmann
2016-01-27 16:34                         ` Austin S. Hemmelgarn
2016-01-27 20:58                           ` bbrendon
2016-01-27 21:53                           ` Chris Murphy
2016-01-28 12:27                             ` Austin S. Hemmelgarn
2016-02-01 14:10                             ` Christian Rohmann
2016-02-01 20:52                               ` Chris Murphy
2016-02-09 13:48                                 ` Christian Rohmann
2016-02-09 16:46                                   ` Marc MERLIN
2016-02-09 21:46                                   ` Chris Murphy
2016-02-10  2:23                                     ` Chris Murphy
2016-02-10  2:36                                       ` Chris Murphy
2016-02-10 13:19                                     ` Christian Rohmann [this message]
2016-02-10 19:16                                       ` Chris Murphy
2016-02-10 19:38                                         ` Chris Murphy

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=56BB38D4.6030008@netcologne.de \
    --to=crohmann@netcologne.de \
    --cc=ahferroin7@gmail.com \
    --cc=linux-btrfs@vger.kernel.org \
    --cc=lists@colorremedies.com \
    /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).