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List: kfm-devel
Subject: Re: Review Request 115064: Use only one "directory contents counting" thread per process
From: "Frank Reininghaus" <frank78ac () googlemail ! com>
Date: 2014-01-21 18:11:37
Message-ID: 20140121181137.17756.27088 () probe ! kde ! org
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https://git.reviewboard.kde.org/r/115064/
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(Updated Jan. 21, 2014, 6:11 p.m.)
Status
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This change has been marked as submitted.
Review request for Dolphin.
Repository: kde-baseapps
Description
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Since https://git.reviewboard.kde.org/r/111920/, we use a separate thread for \
counting the items inside directories (e.g., for the "Size" column in Details View) \
to prevent that the GUI is blocked while handling large directories. However, this \
means that Dolphin now uses quite a lot of threads if there are many views. To see \
that, run Dolphin in gdb, open many tabs with Ctrl+T, and check the output of "thread \
apply all backtrace.
I propose to make all views share the same thread. The QThread object is stored in a \
global variable, and each view increments/decrements a reference count when it \
starts/stops using the thread. If this thread reaches zero, the thread is stopped.
Diffs
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dolphin/src/kitemviews/private/kdirectorycontentscounter.h 425c363
dolphin/src/kitemviews/private/kdirectorycontentscounter.cpp fd8479f
Diff: https://git.reviewboard.kde.org/r/115064/diff/
Testing
-------
Opening new views does not start new threads any more. The "Size" column in Details \
view still works normally for me.
Thanks,
Frank Reininghaus
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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/115064/">https://git.reviewboard.kde.org/r/115064/</a>
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<div>Review request for Dolphin.</div>
<div>By Frank Reininghaus.</div>
<p style="color: grey;"><i>Updated Jan. 21, 2014, 6:11 p.m.</i></p>
<div style="margin-top: 1.5em;">
<b style="color: #575012; font-size: 10pt;">Repository: </b>
kde-baseapps
</div>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" \
style="border: 1px solid #b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;">Since https://git.reviewboard.kde.org/r/111920/, we use a separate \
thread for counting the items inside directories (e.g., for the "Size" \
column in Details View) to prevent that the GUI is blocked while handling large \
directories. However, this means that Dolphin now uses quite a lot of threads if \
there are many views. To see that, run Dolphin in gdb, open many tabs with Ctrl+T, \
and check the output of "thread apply all backtrace.
I propose to make all views share the same thread. The QThread object is stored in a \
global variable, and each view increments/decrements a reference count when it \
starts/stops using the thread. If this thread reaches zero, the thread is \
stopped.</pre> </td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: \
1px solid #b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;">Opening new views does not start new threads any more. The \
"Size" column in Details view still works normally for me.</pre> </td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">
<li>dolphin/src/kitemviews/private/kdirectorycontentscounter.h <span style="color: \
grey">(425c363)</span></li>
<li>dolphin/src/kitemviews/private/kdirectorycontentscounter.cpp <span style="color: \
grey">(fd8479f)</span></li>
</ul>
<p><a href="https://git.reviewboard.kde.org/r/115064/diff/" style="margin-left: \
3em;">View Diff</a></p>
</td>
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