From: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
To: mpe@ellerman.id.au
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v2] powerpc/perf: Add mem access events to sysfs
Date: Mon, 10 Dec 2018 09:29:05 +0530 [thread overview]
Message-ID: <1544414345-13031-1-git-send-email-maddy@linux.vnet.ibm.com> (raw)
Add mem-loads/mem-stores events to sysfs.
The event is formed based on raw event encoding.
Primary PMU event used here is PM_MRK_INST_CMPL
along with MMCRA[SM] modes and Thresholding bit
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
---
Changelog v1:
- Added comments on the MMCRA/Raw-event encoding bits set.
arch/powerpc/perf/power9-events-list.h | 24 ++++++++++++++++++++++++
arch/powerpc/perf/power9-pmu.c | 4 ++++
2 files changed, 28 insertions(+)
diff --git a/arch/powerpc/perf/power9-events-list.h b/arch/powerpc/perf/power9-events-list.h
index 7de344b7d9cc..063c9d9f2516 100644
--- a/arch/powerpc/perf/power9-events-list.h
+++ b/arch/powerpc/perf/power9-events-list.h
@@ -97,3 +97,27 @@ EVENT(PM_MRK_DTLB_MISS_64K, 0x3d156)
EVENT(PM_DTLB_MISS_16M, 0x4c056)
EVENT(PM_DTLB_MISS_1G, 0x4c05a)
EVENT(PM_MRK_DTLB_MISS_16M, 0x4c15e)
+
+/*
+ * Memory Access Events
+ *
+ * Primary PMU event used here is PM_MRK_INST_CMPL (0x401e0)
+ * To enable capturing of memory profiling, these MMCRA bits
+ * needs to be programmed and corresponding raw event format
+ * encoding.
+ *
+ * MMCRA bits encoding needed are
+ * SM (Sampling Mode)
+ * EM (Eligibility for Random Sampling)
+ * TECE (Threshold Event Counter Event)
+ * TS (Threshold Start Event)
+ * TE (Threshold End Event)
+ *
+ * Corresponding Raw Encoding bits:
+ * sample [EM,SM]
+ * thresh_sel (TECE)
+ * thresh start (TS)
+ * thresh end (TE)
+ */
+EVENT(MEM_LOADS, 0x34340401e0)
+EVENT(MEM_STORES, 0x343c0401e0)
diff --git a/arch/powerpc/perf/power9-pmu.c b/arch/powerpc/perf/power9-pmu.c
index e012b1030a5b..a722f25e5d87 100644
--- a/arch/powerpc/perf/power9-pmu.c
+++ b/arch/powerpc/perf/power9-pmu.c
@@ -168,6 +168,8 @@ GENERIC_EVENT_ATTR(branch-instructions, PM_BR_CMPL);
GENERIC_EVENT_ATTR(branch-misses, PM_BR_MPRED_CMPL);
GENERIC_EVENT_ATTR(cache-references, PM_LD_REF_L1);
GENERIC_EVENT_ATTR(cache-misses, PM_LD_MISS_L1_FIN);
+GENERIC_EVENT_ATTR(mem-loads, MEM_LOADS);
+GENERIC_EVENT_ATTR(mem-stores, MEM_STORES);
CACHE_EVENT_ATTR(L1-dcache-load-misses, PM_LD_MISS_L1_FIN);
CACHE_EVENT_ATTR(L1-dcache-loads, PM_LD_REF_L1);
@@ -195,6 +197,8 @@ static struct attribute *power9_events_attr[] = {
GENERIC_EVENT_PTR(PM_BR_MPRED_CMPL),
GENERIC_EVENT_PTR(PM_LD_REF_L1),
GENERIC_EVENT_PTR(PM_LD_MISS_L1_FIN),
+ GENERIC_EVENT_PTR(MEM_LOADS),
+ GENERIC_EVENT_PTR(MEM_STORES),
CACHE_EVENT_PTR(PM_LD_MISS_L1_FIN),
CACHE_EVENT_PTR(PM_LD_REF_L1),
CACHE_EVENT_PTR(PM_L1_PREF),
--
2.7.4
next reply other threads:[~2018-12-10 4:23 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-10 3:59 Madhavan Srinivasan [this message]
2019-02-08 13:02 ` [v2] powerpc/perf: Add mem access events to sysfs Michael Ellerman
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