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| author | Matt Helsley <matthltc@us.ibm.com> | 2005-12-12 00:37:10 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-12-12 08:57:42 -0800 |
| commit | 5650b736ad328f7f3e4120e8790940289b8ac144 (patch) | |
| tree | fb2287d21b6f826f3e291892c3d5c6e640a13c45 /drivers/connector | |
| parent | 64123fd42c7a1e4ebf6acd2399c98caddc7e0c26 (diff) | |
| download | lwn-5650b736ad328f7f3e4120e8790940289b8ac144.tar.gz lwn-5650b736ad328f7f3e4120e8790940289b8ac144.zip | |
[PATCH] Add timestamp field to process events
This adds a timestamp field to the events sent via the process event
connector. The timestamp allows listeners to accurately account the
duration(s) between a process' events and offers strong means with which
to determine the order of events with respect to a given task while also
avoiding the addition of per-task data.
This alters the size and layout of the event structure and hence would
break compatibility if process events connector as it stands in 2.6.15-rc2
were released as a mainline kernel.
Signed-off-by: Matt Helsley <matthltc@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/connector')
| -rw-r--r-- | drivers/connector/cn_proc.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/connector/cn_proc.c b/drivers/connector/cn_proc.c index fcdf0fff13a6..969d2b4aaec0 100644 --- a/drivers/connector/cn_proc.c +++ b/drivers/connector/cn_proc.c @@ -56,6 +56,7 @@ void proc_fork_connector(struct task_struct *task) msg = (struct cn_msg*)buffer; ev = (struct proc_event*)msg->data; get_seq(&msg->seq, &ev->cpu); + getnstimestamp(&ev->timestamp); ev->what = PROC_EVENT_FORK; ev->event_data.fork.parent_pid = task->real_parent->pid; ev->event_data.fork.parent_tgid = task->real_parent->tgid; @@ -81,6 +82,7 @@ void proc_exec_connector(struct task_struct *task) msg = (struct cn_msg*)buffer; ev = (struct proc_event*)msg->data; get_seq(&msg->seq, &ev->cpu); + getnstimestamp(&ev->timestamp); ev->what = PROC_EVENT_EXEC; ev->event_data.exec.process_pid = task->pid; ev->event_data.exec.process_tgid = task->tgid; @@ -114,6 +116,7 @@ void proc_id_connector(struct task_struct *task, int which_id) } else return; get_seq(&msg->seq, &ev->cpu); + getnstimestamp(&ev->timestamp); memcpy(&msg->id, &cn_proc_event_id, sizeof(msg->id)); msg->ack = 0; /* not used */ @@ -133,6 +136,7 @@ void proc_exit_connector(struct task_struct *task) msg = (struct cn_msg*)buffer; ev = (struct proc_event*)msg->data; get_seq(&msg->seq, &ev->cpu); + getnstimestamp(&ev->timestamp); ev->what = PROC_EVENT_EXIT; ev->event_data.exit.process_pid = task->pid; ev->event_data.exit.process_tgid = task->tgid; @@ -165,6 +169,7 @@ static void cn_proc_ack(int err, int rcvd_seq, int rcvd_ack) msg = (struct cn_msg*)buffer; ev = (struct proc_event*)msg->data; msg->seq = rcvd_seq; + getnstimestamp(&ev->timestamp); ev->cpu = -1; ev->what = PROC_EVENT_NONE; ev->event_data.ack.err = err; |