From 5650b736ad328f7f3e4120e8790940289b8ac144 Mon Sep 17 00:00:00 2001 From: Matt Helsley Date: Mon, 12 Dec 2005 00:37:10 -0800 Subject: [PATCH] [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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/connector/cn_proc.c | 5 +++++ include/linux/cn_proc.h | 2 ++ 2 files changed, 7 insertions(+) diff --git a/drivers/connector/cn_proc.c b/drivers/connector/cn_proc.c index fcdf0fff13a..969d2b4aaec 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; diff --git a/include/linux/cn_proc.h b/include/linux/cn_proc.h index c948f678e04..1417de93505 100644 --- a/include/linux/cn_proc.h +++ b/include/linux/cn_proc.h @@ -26,6 +26,7 @@ #define CN_PROC_H #include +#include #include /* @@ -65,6 +66,7 @@ struct proc_event { PROC_EVENT_EXIT = 0x80000000 } what; __u32 cpu; + struct timespec timestamp; union { /* must be last field of proc_event struct */ struct { __u32 err; -- 2.20.1