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[Bug nptl/4274] Performance issue: pthread_cond_signal() causes three context switches instead of one
- From: "jakub at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: 30 Mar 2007 11:35:32 -0000
- Subject: [Bug nptl/4274] Performance issue: pthread_cond_signal() causes three context switches instead of one
- References: <20070325101629.4274.bart.vanassche@gmail.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From jakub at redhat dot com 2007-03-30 12:35 -------
Can you strace -f it? If it doesn't use futex (..., 0x5, ...) (aka
FUTEX_WAKE_OP), then it is just a badly built glibc or your kernel is missing
that functionality.
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What |Removed |Added
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Status|REOPENED |WAITING
http://sourceware.org/bugzilla/show_bug.cgi?id=4274
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