[edk2-devel] [PATCH] UefiCpuPkg/SmmCpu: Add PcdSmmApPerfLogEnable control AP perf-logging
Ni, Ray
ray.ni at intel.com
Wed Jun 7 08:37:31 UTC 2023
When a platform has lots of CPU cores/threads, perf-logging on every
AP produces lots of records. When this multiplies with number of SMIs
during post, the records are even more.
So, this patch adds a new PCD PcdSmmApPerfLogEnable (default TRUE)
to allow platform to turn off perf-logging on APs.
Cc: Eric Dong <eric.dong at intel.com>
Cc: Rahul Kumar <rahul1.kumar at intel.com>
Cc: Gerd Hoffmann <kraxel at redhat.com>
---
UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c | 2 +-
UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf | 1 +
UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.c | 11 ++++++++++-
UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.h | 4 +++-
UefiCpuPkg/UefiCpuPkg.dec | 6 ++++++
5 files changed, 21 insertions(+), 3 deletions(-)
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c b/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c
index bcd90f0671..8364b73242 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c
@@ -784,7 +784,7 @@ BSPHandler (
// Any SMM MP performance logging after this point will be migrated in next SMI.
//
PERF_CODE (
- MigrateMpPerf (gSmmCpuPrivate->SmmCoreEntryContext.NumberOfCpus);
+ MigrateMpPerf (gSmmCpuPrivate->SmmCoreEntryContext.NumberOfCpus, CpuIndex);
);
//
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf
index 4864532c35..d864ae9101 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf
@@ -128,6 +128,7 @@
gUefiCpuPkgTokenSpaceGuid.PcdCpuSmmProfileRingBuffer ## CONSUMES
gUefiCpuPkgTokenSpaceGuid.PcdCpuSmmFeatureControlMsrLock ## CONSUMES
gEfiMdeModulePkgTokenSpaceGuid.PcdDxeIplSwitchToLongMode ## CONSUMES
+ gUefiCpuPkgTokenSpaceGuid.PcdSmmApPerfLogEnable ## CONSUMES
[Pcd]
gUefiCpuPkgTokenSpaceGuid.PcdCpuMaxLogicalProcessorNumber ## SOMETIMES_CONSUMES
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.c b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.c
index c13556af46..92c67f31bf 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.c
@@ -39,16 +39,25 @@ InitializeMpPerf (
Migrate MP performance data to standardized performance database.
@param NumberofCpus Number of processors in the platform.
+ @param BspIndex The index of the BSP.
**/
VOID
MigrateMpPerf (
- UINTN NumberofCpus
+ UINTN NumberofCpus,
+ UINTN BspIndex
)
{
UINTN CpuIndex;
UINTN MpProcecureId;
for (CpuIndex = 0; CpuIndex < NumberofCpus; CpuIndex++) {
+ if ((CpuIndex != BspIndex) && !FeaturePcdGet (PcdSmmApPerfLogEnable)) {
+ //
+ // Skip migrating AP performance data if AP perf-logging is disabled.
+ //
+ continue;
+ }
+
for (MpProcecureId = 0; MpProcecureId < SMM_MP_PERF_PROCEDURE_ID (SmmMpProcedureMax); MpProcecureId++) {
if (mSmmMpProcedurePerformance[CpuIndex].Begin[MpProcecureId] != 0) {
PERF_START (NULL, gSmmMpPerfProcedureName[MpProcecureId], NULL, mSmmMpProcedurePerformance[CpuIndex].Begin[MpProcecureId]);
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.h b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.h
index b148a99e86..5ad1734cc8 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.h
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmMpPerf.h
@@ -44,10 +44,12 @@ InitializeMpPerf (
Migrate MP performance data to standardized performance database.
@param NumberofCpus Number of processors in the platform.
+ @param BspIndex The index of the BSP.
**/
VOID
MigrateMpPerf (
- UINTN NumberofCpus
+ UINTN NumberofCpus,
+ UINTN BspIndex
);
/**
diff --git a/UefiCpuPkg/UefiCpuPkg.dec b/UefiCpuPkg/UefiCpuPkg.dec
index d31c3b127c..5b0ac64e33 100644
--- a/UefiCpuPkg/UefiCpuPkg.dec
+++ b/UefiCpuPkg/UefiCpuPkg.dec
@@ -175,6 +175,12 @@
# @Prompt Support SmmFeatureControl.
gUefiCpuPkgTokenSpaceGuid.PcdSmmFeatureControlEnable|TRUE|BOOLEAN|0x32132110
+ ## Indicates if SMM perf logging in APs will be enabled.<BR><BR>
+ # TRUE - SMM perf logging in APs will be enabled.<BR>
+ # FALSE - SMM perf logging in APs will not be enabled.<BR>
+ # @Prompt Enable SMM perf logging in APs.
+ gUefiCpuPkgTokenSpaceGuid.PcdSmmApPerfLogEnable|TRUE|BOOLEAN|0x32132114
+
[PcdsFixedAtBuild]
## List of exception vectors which need switching stack.
# This PCD will only take into effect if PcdCpuStackGuard is enabled.
--
2.39.1.windows.1
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