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authorMatt Helsley <matthltc@us.ibm.com>2005-12-12 03:37:10 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2005-12-12 11:57:42 -0500
commit5650b736ad328f7f3e4120e8790940289b8ac144 (patch)
treefb2287d21b6f826f3e291892c3d5c6e640a13c45 /drivers/connector
parent64123fd42c7a1e4ebf6acd2399c98caddc7e0c26 (diff)
[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.c5
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)
56 msg = (struct cn_msg*)buffer; 56 msg = (struct cn_msg*)buffer;
57 ev = (struct proc_event*)msg->data; 57 ev = (struct proc_event*)msg->data;
58 get_seq(&msg->seq, &ev->cpu); 58 get_seq(&msg->seq, &ev->cpu);
59 getnstimestamp(&ev->timestamp);
59 ev->what = PROC_EVENT_FORK; 60 ev->what = PROC_EVENT_FORK;
60 ev->event_data.fork.parent_pid = task->real_parent->pid; 61 ev->event_data.fork.parent_pid = task->real_parent->pid;
61 ev->event_data.fork.parent_tgid = task->real_parent->tgid; 62 ev->event_data.fork.parent_tgid = task->real_parent->tgid;
@@ -81,6 +82,7 @@ void proc_exec_connector(struct task_struct *task)
81 msg = (struct cn_msg*)buffer; 82 msg = (struct cn_msg*)buffer;
82 ev = (struct proc_event*)msg->data; 83 ev = (struct proc_event*)msg->data;
83 get_seq(&msg->seq, &ev->cpu); 84 get_seq(&msg->seq, &ev->cpu);
85 getnstimestamp(&ev->timestamp);
84 ev->what = PROC_EVENT_EXEC; 86 ev->what = PROC_EVENT_EXEC;
85 ev->event_data.exec.process_pid = task->pid; 87 ev->event_data.exec.process_pid = task->pid;
86 ev->event_data.exec.process_tgid = task->tgid; 88 ev->event_data.exec.process_tgid = task->tgid;
@@ -114,6 +116,7 @@ void proc_id_connector(struct task_struct *task, int which_id)
114 } else 116 } else
115 return; 117 return;
116 get_seq(&msg->seq, &ev->cpu); 118 get_seq(&msg->seq, &ev->cpu);
119 getnstimestamp(&ev->timestamp);
117 120
118 memcpy(&msg->id, &cn_proc_event_id, sizeof(msg->id)); 121 memcpy(&msg->id, &cn_proc_event_id, sizeof(msg->id));
119 msg->ack = 0; /* not used */ 122 msg->ack = 0; /* not used */
@@ -133,6 +136,7 @@ void proc_exit_connector(struct task_struct *task)
133 msg = (struct cn_msg*)buffer; 136 msg = (struct cn_msg*)buffer;
134 ev = (struct proc_event*)msg->data; 137 ev = (struct proc_event*)msg->data;
135 get_seq(&msg->seq, &ev->cpu); 138 get_seq(&msg->seq, &ev->cpu);
139 getnstimestamp(&ev->timestamp);
136 ev->what = PROC_EVENT_EXIT; 140 ev->what = PROC_EVENT_EXIT;
137 ev->event_data.exit.process_pid = task->pid; 141 ev->event_data.exit.process_pid = task->pid;
138 ev->event_data.exit.process_tgid = task->tgid; 142 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)
165 msg = (struct cn_msg*)buffer; 169 msg = (struct cn_msg*)buffer;
166 ev = (struct proc_event*)msg->data; 170 ev = (struct proc_event*)msg->data;
167 msg->seq = rcvd_seq; 171 msg->seq = rcvd_seq;
172 getnstimestamp(&ev->timestamp);
168 ev->cpu = -1; 173 ev->cpu = -1;
169 ev->what = PROC_EVENT_NONE; 174 ev->what = PROC_EVENT_NONE;
170 ev->event_data.ack.err = err; 175 ev->event_data.ack.err = err;