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List:       kde-bugs-dist
Subject:    [Bug 147593] KDevelop takes about 30% of CPU power when should be
From:       Nicolas Bigaouette <nbigaouette () gmail ! com>
Date:       2008-03-08 16:15:30
Message-ID: 20080308161530.18077.qmail () ktown ! kde ! org
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http://bugs.kde.org/show_bug.cgi?id=147593         




------- Additional Comments From nbigaouette gmail com  2008-03-08 17:15 -------
Created an attachment (id=23834)
 --> (http://bugs.kde.org/attachment.cgi?id=23834&action=view)
strace output of kdevelop

Kdevelop is reported to cause >200 wake-ups per second by powertop. Here is the
strace output (strace -f -F -s 1024 -p <pid> -o kdevelop_trace.out).

I have many, many, many:
7167  <... restart_syscall resumed> )	= -1 ETIMEDOUT (Connection timed out)
7167  futex(0x407fffc0, FUTEX_WAKE_PRIVATE, 1) = 0
7167  futex(0x407fff94, FUTEX_WAIT_PRIVATE, 1, {0, 9996780} <unfinished ...>

Powertop reports:
  27,0% (157,0) 	 kdevelop : schedule_timeout (process_timeout)
  16,9% ( 98,4) 	 kdevelop : futex_wait (hrtimer_wakeup)
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