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Message-ID: <174782976245.406.13828505450890251421.tip-bot2@tip-bot2>
Date: Wed, 21 May 2025 12:16:02 -0000
From: "tip-bot2 for Kan Liang" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Kan Liang <kan.liang@...ux.intel.com>,
"Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
linux-kernel@...r.kernel.org
Subject:
[tip: perf/core] perf/x86/intel: Remove driver-specific throttle support
The following commit has been merged into the perf/core branch of tip:
Commit-ID: b8328f67206c672a7140fd3a259892e17d96bbe6
Gitweb: https://git.kernel.org/tip/b8328f67206c672a7140fd3a259892e17d96bbe6
Author: Kan Liang <kan.liang@...ux.intel.com>
AuthorDate: Tue, 20 May 2025 11:16:31 -07:00
Committer: Peter Zijlstra <peterz@...radead.org>
CommitterDate: Wed, 21 May 2025 13:57:43 +02:00
perf/x86/intel: 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@...ux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lore.kernel.org/r/20250520181644.2673067-4-kan.liang@linux.intel.com
---
arch/x86/events/core.c | 3 +--
arch/x86/events/intel/core.c | 6 ++----
arch/x86/events/intel/ds.c | 7 +++----
arch/x86/events/intel/knc.c | 3 +--
arch/x86/events/intel/p4.c | 3 +--
5 files changed, 8 insertions(+), 14 deletions(-)
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 92c3fb6..4c49eef 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -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)
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index cd63292..3a319cf 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -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;
diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c
index 319d0d4..fb02e43 100644
--- a/arch/x86/events/intel/ds.c
+++ b/arch/x86/events/intel/ds.c
@@ -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]) {
diff --git a/arch/x86/events/intel/knc.c b/arch/x86/events/intel/knc.c
index 3e8ec04..3845891 100644
--- a/arch/x86/events/intel/knc.c
+++ b/arch/x86/events/intel/knc.c
@@ -254,8 +254,7 @@ again:
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);
}
/*
diff --git a/arch/x86/events/intel/p4.c b/arch/x86/events/intel/p4.c
index c85a9fc..126d5ae 100644
--- a/arch/x86/events/intel/p4.c
+++ b/arch/x86/events/intel/p4.c
@@ -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)
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