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Date: Mon, 4 Jul 2011 08:02:02 +0000
From: Lin Ming <ming.m.lin@...el.com>
To: Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Ingo Molnar <mingo@...e.hu>, Andi Kleen <andi@...stfloor.org>,
Stephane Eranian <eranian@...gle.com>,
Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc: linux-kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/4] perf: Add memory load/store events generic code
Add generic memory load/store events: PERF_COUNT_HW_MEM_{LOAD, STORE}
Add generic memory load/store operation encoding.
Add code to handle memory operation data.
Signed-off-by: Lin Ming <ming.m.lin@...el.com>
---
include/linux/perf_event.h | 44 +++++++++++++++++++++++++++++++++++++++++++-
kernel/events/core.c | 12 ++++++++++++
2 files changed, 55 insertions(+), 1 deletions(-)
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index e76a410..c410ae4 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -54,6 +54,8 @@ enum perf_hw_id {
PERF_COUNT_HW_BUS_CYCLES = 6,
PERF_COUNT_HW_STALLED_CYCLES_FRONTEND = 7,
PERF_COUNT_HW_STALLED_CYCLES_BACKEND = 8,
+ PERF_COUNT_HW_MEM_LOAD = 9,
+ PERF_COUNT_HW_MEM_STORE = 10,
PERF_COUNT_HW_MAX, /* non-ABI */
};
@@ -127,8 +129,10 @@ enum perf_event_sample_format {
PERF_SAMPLE_PERIOD = 1U << 8,
PERF_SAMPLE_STREAM_ID = 1U << 9,
PERF_SAMPLE_RAW = 1U << 10,
+ PERF_SAMPLE_LATENCY = 1U << 11,
+ PERF_SAMPLE_EXTRA = 1U << 12,
- PERF_SAMPLE_MAX = 1U << 11, /* non-ABI */
+ PERF_SAMPLE_MAX = 1U << 13, /* non-ABI */
};
/*
@@ -432,6 +436,8 @@ enum perf_event_type {
* { u64 stream_id;} && PERF_SAMPLE_STREAM_ID
* { u32 cpu, res; } && PERF_SAMPLE_CPU
* { u64 period; } && PERF_SAMPLE_PERIOD
+ * { u64 latency; } && PERF_SAMPLE_LATENCY
+ * { u64 extra; } && PERF_SAMPLE_EXTRA
*
* { struct read_format values; } && PERF_SAMPLE_READ
*
@@ -474,6 +480,40 @@ enum perf_callchain_context {
#define PERF_FLAG_FD_OUTPUT (1U << 1)
#define PERF_FLAG_PID_CGROUP (1U << 2) /* pid=cgroup id, per-cpu mode only */
+/*
+ * Memory load operation info encoding
+ */
+
+/* Bits(0-1) {L1, L2, L3, RAM} or {unknown, IO, uncached, reserved} */
+#define MEM_LOAD_L1 0x00
+#define MEM_LOAD_L2 0x01
+#define MEM_LOAD_L3 0x02
+#define MEM_LOAD_RAM 0x03
+#define MEM_LOAD_UNKNOWN 0x00
+#define MEM_LOAD_IO 0x01
+#define MEM_LOAD_UNCACHED 0x02
+#define MEM_LOAD_RESERVED 0x03
+
+/* Bits(2-3) {toggle, snoop, local, remote} */
+#define MEM_LOAD_TOGGLE (0x00 << 2)
+#define MEM_LOAD_SNOOP (0x01 << 2)
+#define MEM_LOAD_LOCAL (0x02 << 2)
+#define MEM_LOAD_REMOTE (0x03 << 2)
+
+/* Bits(4-5) {modified, exclusive, shared, invalid} */
+#define MEM_LOAD_MODIFIED (0x00 << 4)
+#define MEM_LOAD_EXCLUSIVE (0x01 << 4)
+#define MEM_LOAD_SHARED (0x02 << 4)
+#define MEM_LOAD_INVALID (0x03 << 4)
+
+/*
+ * Memory store operation info encoding
+ */
+
+#define MEM_STORE_DCU_HIT (1ULL << 0)
+#define MEM_STORE_STLB_HIT (1ULL << 1)
+#define MEM_STORE_LOCKED_ACCESS (1ULL << 2)
+
#ifdef __KERNEL__
/*
* Kernel-internal data types and definitions:
@@ -974,6 +1014,8 @@ struct perf_sample_data {
u32 reserved;
} cpu_entry;
u64 period;
+ u64 latency;
+ u64 extra;
struct perf_callchain_entry *callchain;
struct perf_raw_record *raw;
};
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 5e70f62..b835ef5 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -887,6 +887,12 @@ static void perf_event__header_size(struct perf_event *event)
if (sample_type & PERF_SAMPLE_PERIOD)
size += sizeof(data->period);
+ if (sample_type & PERF_SAMPLE_LATENCY)
+ size += sizeof(data->latency);
+
+ if (sample_type & PERF_SAMPLE_EXTRA)
+ size += sizeof(data->extra);
+
if (sample_type & PERF_SAMPLE_READ)
size += event->read_size;
@@ -3871,6 +3877,12 @@ void perf_output_sample(struct perf_output_handle *handle,
if (sample_type & PERF_SAMPLE_PERIOD)
perf_output_put(handle, data->period);
+ if (sample_type & PERF_SAMPLE_LATENCY)
+ perf_output_put(handle, data->latency);
+
+ if (sample_type & PERF_SAMPLE_EXTRA)
+ perf_output_put(handle, data->extra);
+
if (sample_type & PERF_SAMPLE_READ)
perf_output_read(handle, event);
--
1.7.5.1
--
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