** Branch linked: lp:ubuntu/pm-utils
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https://bugs.launchpad.net/bugs/900923
Title:
pm-utils: readahead and journal-commit waste power
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htt
This bug was fixed in the package pm-utils - 1.4.1-8+git1
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pm-utils (1.4.1-8+git1) precise; urgency=low
Upload current Debian packaging GIT head (patches still need to be discussed
with Debian/upstream before doing a Debian upload).
* Add 26-inhibit-on-right-status.patch: Do
Committed to Debian packaging git.
** Changed in: pm-utils (Ubuntu Precise)
Status: Triaged => Fix Committed
** Changed in: pm-utils (Ubuntu Precise)
Assignee: Canonical Foundations Team (canonical-foundations) => Martin
Pitt (pitti)
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Forwarded upstream, and I asked Michael Biebl about this. He's both an
upstream committer and the Debian maintainer, so we can sort this out in
the Debian git. If he wants to keep them, I can do a commit to not
install the scripts in an Ubuntu build.
** Bug watch added: freedesktop.org Bugzilla #4
** Tags added: battery-power-consumption
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Title:
pm-utils: readahead and journal-commit waste power
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thanks, this looks pretty decisive that we're better off dropping these
settings.
** Changed in: pm-utils (Ubuntu Precise)
Status: New => Triaged
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@Steve, also attached are the results from pm-utils readahead tests run
with the same testing scenarios as in #5
I suspect that readahead is marginally beneficial for systems with
spinning media (within the margins of measurement error), and with SSDs
(like my HP mini 10) it is definitely less pow
Sorry, forgot the spreadsheet data
** Attachment added: "pm-utils-journal-commit-apps-test.ods"
https://bugs.launchpad.net/ubuntu/+source/pm-utils/+bug/900923/+attachment/2623324/+files/pm-utils-journal-commit-apps-test.ods
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Steve, I've re-instrumented the journal-commit tests this time using the
following test methodology:
Start banshee playing some classical music (mp3)
Sleep 60 seconds
Start firefox, open tab on a blog containing flash adverts
Sleep 60 seconds
Open 2nd tab on firefox on a blog with lots of images,
On Tue, Dec 06, 2011 at 09:39:48PM -, Colin King wrote:
> Hi Steve, I will re-rerun journal-commit on an idle system tomorrow and
> get back to you. Any ideas of scenarios that are typical and may
> generate typical I/O patterns?
I'd guess that typical patterns would include playing music via
Hi Steve, I will re-rerun journal-commit on an idle system tomorrow and
get back to you. Any ideas of scenarios that are typical and may
generate typical I/O patterns?
As for the 600 second setting, it is a little scary to see it set so
high and cause potential data loss risk. But, that's kinda
Hi Colin,
Thanks for your work on profiling our power management!
> script: power.d/journal-commit
> Recommendation: We remove this script for two reasons:
> 1) It is shown not to save power on a busy system
Ok, but what about on an *idle* system? The premise is that during
normal usage (and
Since the posting was on a private list, I'm putting a link into the
results and spreadsheet data that covers the analysis:
Results:
http://zinc.canonical.com/~cking/power-benchmarking/pm-utils-results/results.txt
Data:
http://zinc.canonical.com/~cking/power-benchmarking/pm-utils-results/pm-test
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