Package: boinc-client Version: 5.10.30-2 Severity: important Tags: patch --- Please enter the report below this line. --- The CFS in Linux 2.6.24 has the side effect that the boinc user's idle process takes about half of the cpu cycles. This causes severe performance regressions when running boinc-client: half of the cpu cycles are always assigned to boinc and the cpu stepping does not get increased (from 1GHz to 1.8GHz here), when there is non-boinc load.
The attached patch changes the cpu_share of the boinc user to "2" in the init
script ("1" would be better probably, but that causes my system to hard-lock,
others cannot confirm though, see
http://bugzilla.kernel.org/show_bug.cgi?id=9779).
--
http://daniel.hahler.de/
--- debian/boinc-client.init 2008-01-19 20:50:40.000000000 +0100
+++ /etc/init.d/boinc-client 2008-01-19 16:12:43.000000000 +0100
@@ -129,6 +129,13 @@
(schedtool -n 19 -N $pid $children >/dev/null \
&& log_progress_msg "normal")
fi
+
+ # Adjust Linux CFS CPU share (default is 1024, 1 would halt the system):
+ UID=`id -u $BOINC_USER`
+ CPU_SHARE_FILE="/sys/kernel/uids/$UID/cpu_share"
+ if [ -f "$CPU_SHARE_FILE" ]; then
+ echo 2 > "$CPU_SHARE_FILE"
+ fi
fi
log_end_msg 0
}
@@ -148,6 +155,13 @@
schedtool $children
fi
fi
+
+ UID=`id -u $BOINC_USER`
+ CPU_SHARE_FILE="/sys/kernel/uids/$UID/cpu_share"
+ if [ -f "$CPU_SHARE_FILE" ]; then
+ log_success_msg "cpu_share: `cat "$CPU_SHARE_FILE"`"
+ fi
+
else
log_success_msg "$STATUS stopped."
fi
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