| commit | c8924363da07aec213e5d359f23eeae1fff91951 | |
| author | Shailabh Nagar <nagar@watson.ibm.com> | |
| Fri, 14 Jul 2006 07:24:46 +0000 (14 00:24 -0700) | ||
| committer | Linus Torvalds <torvalds@g5.osdl.org> | |
| Sat, 15 Jul 2006 04:53:57 +0000 (14 21:53 -0700) | ||
| tree | bef390d55719cf3f4b0d02c7efe03dd9ebc7321a | treesnapshot (tar.gz zip) |
| parent | 9e06d3f9f6b14f6e3120923ed215032726246c98 | commitdiff |
[PATCH] per-task delay accounting: avoid send without listeners
Don't send taskstats (per-pid or per-tgid) on thread exit when no one is
listening for such data.
Currently the taskstats interface allocates a structure, fills it in and
calls netlink to send out per-pid and per-tgid stats regardless of whether
a userspace listener for the data exists (netlink layer would check for
that and avoid the multicast).
As a result of this patch, the check for the no-listener case is performed
early, avoiding the redundant allocation and filling up of the taskstats
structures.
Signed-off-by: Balbir Singh <balbir@in.ibm.com>
Signed-off-by: Shailabh Nagar <nagar@watson.ibm.com>
Cc: Jay Lan <jlan@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Don't send taskstats (per-pid or per-tgid) on thread exit when no one is
listening for such data.
Currently the taskstats interface allocates a structure, fills it in and
calls netlink to send out per-pid and per-tgid stats regardless of whether
a userspace listener for the data exists (netlink layer would check for
that and avoid the multicast).
As a result of this patch, the check for the no-listener case is performed
early, avoiding the redundant allocation and filling up of the taskstats
structures.
Signed-off-by: Balbir Singh <balbir@in.ibm.com>
Signed-off-by: Shailabh Nagar <nagar@watson.ibm.com>
Cc: Jay Lan <jlan@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| include/linux/taskstats_kern.h | diffblobblamehistory |