Subject: libgloox7: Too short receive timeout causes gloox to busy wait
Package: libgloox7
Version: 0.9.9.5-1.2
Severity: normal
Tags: patch
In ConnectionTCPBase::receive(), there is a line:
while( !m_cancel && ( err = recv( 10 ) ) == ConnNoError )
This is a timeout of 10 microseconds, which causes recv() to immediately timeout and in fact busy-wait, uselessly
eating significant amount of CPU time. More sane timeout value should be used.
Bug can be solved with following small patch or by updating the package to version in upstream SVN branch 1.0, where
this is already fixed.
--- gloox-0.9.9.5/src/connectiontcpbase.cpp 2008-04-26 13:47:24.000000000
+0200
+++ connectiontcpbase.cpp 2009-12-27 02:40:39.940853288 +0100
@@ -107,7 +107,7 @@
return ConnNotConnected;
ConnectionError err = ConnNoError;
- while( !m_cancel && ( err = recv( 10 ) ) == ConnNoError )
+ while( !m_cancel && ( err = recv( 1000000 ) ) == ConnNoError )
;
return err == ConnNoError ? ConnNotConnected : err;
}
-- System Information:
Debian Release: squeeze/sid
APT prefers testing
APT policy: (500, 'testing'), (500, 'stable')
Architecture: i386 (i686)
Kernel: Linux 2.6.30-2-686 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages libgloox7 depends on:
ii libc6 2.10.2-2 GNU C Library: Shared libraries
ii libgcc1 1:4.4.2-3 GCC support library
ii libgnutls26 2.8.5-2 the GNU TLS library - runtime libr
ii libidn11 1.15-2 GNU Libidn library, implementation
ii libstdc++6 4.4.2-3 The GNU Standard C++ Library v3
ii zlib1g 1:1.2.3.3.dfsg-15 compression library - runtime
libgloox7 recommends no packages.
libgloox7 suggests no packages.
-- no debconf information
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