superrob1500
/
mirror-linux
mirror of https://github.com/torvalds/linux
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

alpha/perf: Remove driver-specific throttle support 

The throttle support has been added in the generic code. Remove
the driver-specific throttle support.

Besides the throttle, perf_event_overflow may return true because of
event_limit. It already does an inatomic event disable. The pmu->stop
is not required either.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250520181644.2673067-11-kan.liang@linux.intel.com
pull/1250/head
Kan Liang 2025-05-20 11:16:38 -07:00 committed by Peter Zijlstra
parent f1a6fe2ab1
commit 8c977a1799
1 changed files with 3 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
arch/alpha/kernel/perf_event.c
View File

@ -852,14 +852,9 @@ static void alpha_perf_event_irq_handler(unsigned long la_ptr,
alpha_perf_event_update(event, hwc, idx, alpha_pmu->pmc_max_period[idx]+1);
perf_sample_data_init(&data, 0, hwc->last_period);
if (alpha_perf_event_set_period(event, hwc, idx)) {
if (perf_event_overflow(event, &data, regs)) {
/* Interrupts coming too quickly; "throttle" the
* counter, i.e., disable it for a little while.
*/
alpha_pmu_stop(event, 0);
}
}
if (alpha_perf_event_set_period(event, hwc, idx))
perf_event_overflow(event, &data, regs);
wrperfmon(PERFMON_CMD_ENABLE, cpuc->idx_mask);
return;