lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

perf_counter, ftrace: Fix perf_counter integration

Browse Source 
Adds possible second part to the assign argument of TP_EVENT().

  TP_perf_assign(
	__perf_count(foo);
	__perf_addr(bar);
  )

Which, when specified make the swcounter increment with @foo instead
of the usual 1, and report @bar for PERF_SAMPLE_ADDR (data address
associated with the event) when this triggers a counter overflow.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra
2009-07-21 17:34:57 +02:00
committed by Ingo Molnar
parent e3560336be
commit 3a6593050f
2 changed files with 88 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
kernel/perf_counter.c
View File

@ -3703,17 +3703,17 @@ static const struct pmu perf_ops_task_clock = {
};
#ifdef CONFIG_EVENT_PROFILE
void perf_tpcounter_event(int event_id)
void perf_tpcounter_event(int event_id, u64 addr, u64 count)
{
struct perf_sample_data data = {
.regs = get_irq_regs(),
.addr = 0,
.addr = addr,
};
if (!data.regs)
data.regs = task_pt_regs(current);
do_perf_swcounter_event(PERF_TYPE_TRACEPOINT, event_id, 1, 1, &data);
do_perf_swcounter_event(PERF_TYPE_TRACEPOINT, event_id, count, 1, &data);
}
EXPORT_SYMBOL_GPL(perf_tpcounter_event);