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perf/x86/intel: Remove driver-specific throttle support

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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/20250520181644.2673067-4-kan.liang@linux.intel.com
This commit is contained in:
Kan Liang
2025-05-20 11:16:31 -07:00
committed by Peter Zijlstra
parent e800ac5120
commit b8328f6720
5 changed files with 8 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
arch/x86/events/core.c
View File

@@ -1728,8 +1728,7 @@ int x86_pmu_handle_irq(struct pt_regs *regs)
perf_sample_save_brstack(&data, event, &cpuc->lbr_stack, NULL);
if (perf_event_overflow(event, &data, regs))
x86_pmu_stop(event, 0);
perf_event_overflow(event, &data, regs);
}
if (handled)

6
arch/x86/events/intel/core.c
View File

@@ -3138,8 +3138,7 @@ static void x86_pmu_handle_guest_pebs(struct pt_regs *regs,
continue;
perf_sample_data_init(data, 0, event->hw.last_period);
if (perf_event_overflow(event, data, regs))
x86_pmu_stop(event, 0);
perf_event_overflow(event, data, regs);
/* Inject one fake event is enough. */
break;
@@ -3282,8 +3281,7 @@ static int handle_pmi_common(struct pt_regs *regs, u64 status)
if (has_branch_stack(event))
intel_pmu_lbr_save_brstack(&data, cpuc, event);
if (perf_event_overflow(event, &data, regs))
x86_pmu_stop(event, 0);
perf_event_overflow(event, &data, regs);
}
return handled;

7
arch/x86/events/intel/ds.c
View File

@@ -2359,8 +2359,7 @@ __intel_pmu_pebs_last_event(struct perf_event *event,
* All but the last records are processed.
* The last one is left to be able to call the overflow handler.
*/
if (perf_event_overflow(event, data, regs))
x86_pmu_stop(event, 0);
perf_event_overflow(event, data, regs);
}
if (hwc->flags & PERF_X86_EVENT_AUTO_RELOAD) {
@@ -2588,8 +2587,8 @@ static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs, struct perf_sample_d
if (error[bit]) {
perf_log_lost_samples(event, error[bit]);
if (iregs && perf_event_account_interrupt(event))
x86_pmu_stop(event, 0);
if (iregs)
perf_event_account_interrupt(event);
}
if (counts[bit]) {

3
arch/x86/events/intel/knc.c
View File

@@ -254,8 +254,7 @@ static int knc_pmu_handle_irq(struct pt_regs *regs)
perf_sample_data_init(&data, 0, last_period);
if (perf_event_overflow(event, &data, regs))
x86_pmu_stop(event, 0);
perf_event_overflow(event, &data, regs);
}
/*

3
arch/x86/events/intel/p4.c
View File

@@ -1072,8 +1072,7 @@ static int p4_pmu_handle_irq(struct pt_regs *regs)
continue;
if (perf_event_overflow(event, &data, regs))
x86_pmu_stop(event, 0);
perf_event_overflow(event, &data, regs);
}
if (handled)