Unverified Commit e184a607 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!12016 perf/x86/intel: Limit the period on Haswell 

Merge Pull Request from: @ci-robot 
 
PR sync from: Li Huafei <lihuafei1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/KOSAEUTNC3V2J7WIEGDGVJBXNAEFBNED/ 
 
https://gitee.com/src-openeuler/kernel/issues/IR511 
 
Link:https://gitee.com/openeuler/kernel/pulls/12016

 

Reviewed-by: default avatarYe Weihua <yeweihua4@huawei.com>
Signed-off-by: default avatarZhang Peng <zhangpeng362@huawei.com>
parents e1fcb05e a47808bd

arch/x86/events/intel/core.c

+21 −2
Original line number Diff line number Diff line
@@ -4520,6 +4520,25 @@ static enum hybrid_cpu_type adl_get_hybrid_cpu_type(void) 
	return HYBRID_INTEL_CORE;

}



static inline bool erratum_hsw11(struct perf_event *event)

{

	return (event->hw.config & INTEL_ARCH_EVENT_MASK) ==

		X86_CONFIG(.event=0xc0, .umask=0x01);

}



/*

 * The HSW11 requires a period larger than 100 which is the same as the BDM11.

 * A minimum period of 128 is enforced as well for the INST_RETIRED.ALL.

 *

 * The message 'interrupt took too long' can be observed on any counter which

 * was armed with a period < 32 and two events expired in the same NMI.

 * A minimum period of 32 is enforced for the rest of the events.

 */

static void hsw_limit_period(struct perf_event *event, s64 *left)

{

	*left = max(*left, erratum_hsw11(event) ? 128 : 32);

}



/*

 * Broadwell:

 *
@@ -4537,8 +4556,7 @@ static enum hybrid_cpu_type adl_get_hybrid_cpu_type(void) 
 */

static void bdw_limit_period(struct perf_event *event, s64 *left)

{

	if ((event->hw.config & INTEL_ARCH_EVENT_MASK) ==

			X86_CONFIG(.event=0xc0, .umask=0x01)) {

	if (erratum_hsw11(event)) {

		if (*left < 128)

			*left = 128;

		*left &= ~0x3fULL;
@@ -6598,6 +6616,7 @@ __init int intel_pmu_init(void) 


		x86_pmu.hw_config = hsw_hw_config;

		x86_pmu.get_event_constraints = hsw_get_event_constraints;

		x86_pmu.limit_period = hsw_limit_period;

		x86_pmu.lbr_double_abort = true;

		extra_attr = boot_cpu_has(X86_FEATURE_RTM) ?

			hsw_format_attr : nhm_format_attr;