perf_event: x86: Optimize the fast path a little more
Remove num from the fast path and save a few ops. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100122155536.056430539@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
parent
272d30be62
commit
c933c1a603
1 changed files with 3 additions and 3 deletions
|
@ -1245,9 +1245,9 @@ static inline int is_x86_event(struct perf_event *event)
|
|||
|
||||
static int x86_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign)
|
||||
{
|
||||
int i, j, w, num, wmax;
|
||||
struct event_constraint *c, *constraints[X86_PMC_IDX_MAX];
|
||||
unsigned long used_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)];
|
||||
int i, j, w, wmax, num = 0;
|
||||
struct hw_perf_event *hwc;
|
||||
|
||||
bitmap_zero(used_mask, X86_PMC_IDX_MAX);
|
||||
|
@ -1260,7 +1260,7 @@ static int x86_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign)
|
|||
/*
|
||||
* fastpath, try to reuse previous register
|
||||
*/
|
||||
for (i = 0, num = n; i < n; i++, num--) {
|
||||
for (i = 0; i < n; i++) {
|
||||
hwc = &cpuc->event_list[i]->hw;
|
||||
c = constraints[i];
|
||||
|
||||
|
@ -1288,7 +1288,7 @@ static int x86_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign)
|
|||
if (assign)
|
||||
assign[i] = hwc->idx;
|
||||
}
|
||||
if (!num)
|
||||
if (i == n)
|
||||
goto done;
|
||||
|
||||
/*
|
||||
|
|
Reference in a new issue