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Subject[GIT-PULL -tip][PATCH 0/6] perf_counter patches
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Ingo,

Please pull perf_counter patches :
The following changes since commit 092304de242705abf24edcb0fc7beed4c4276865:
Ingo Molnar (1):
Merge branch 'perfcounters/urgent'

are available in the git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/jaswinder/linux-2.6-tip.git master

Jaswinder Singh Rajput (6):
perf stat: define MATCH_EVENT for easy attrs checking
perf stat: treat same behaviour for all CYCLES and CLOCKS
perf_counter: Add Generalized Hardware vectored co-processor support for AMD
perf_counter: Add Generalized Hardware interrupt support for AMD
perf_counter: Add hardware vector events for nehalem
perf_counter: Add hardware interrupt events for nehalem, core2 and atom

arch/x86/kernel/cpu/perf_counter.c | 95 ++++++++++++++++++++++++++++++++++++
include/linux/perf_counter.h | 27 ++++++++++
kernel/perf_counter.c | 2 +
tools/perf/builtin-stat.c | 60 ++++++++++++++---------
tools/perf/util/parse-events.c | 73 +++++++++++++++++++++++++++
5 files changed, 233 insertions(+), 24 deletions(-)

Complete diff:
diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index d4cf4ce..4ef1838 100644
--- a/arch/x86/kernel/cpu/perf_counter.c
+++ b/arch/x86/kernel/cpu/perf_counter.c
@@ -372,6 +372,42 @@ static const u64 atom_hw_cache_event_ids
},
};

+/*
+ * Generalized hw vectored co-processor event table
+ */
+
+static u64 __read_mostly hw_vector_event_ids[PERF_COUNT_HW_VECTOR_MAX];
+
+static const u64 nehalem_hw_vector_event_ids[] =
+{
+ [PERF_COUNT_HW_VECTOR_ADD] = 0x01B1, /* UOPS_EXECUTED.PORT0 */
+ [PERF_COUNT_HW_VECTOR_MULTIPLY] = 0x0214, /* ARITH.MUL */
+ [PERF_COUNT_HW_VECTOR_DIVIDE] = 0x0114, /* ARITH.CYCLES_DIV_BUSY */
+ [PERF_COUNT_HW_VECTOR_IDLE_CYCLES] = 0x0,
+ [PERF_COUNT_HW_VECTOR_STALL_CYCLES] = 0x60A2, /* RESOURCE_STALLS.FPCW|MXCSR*/
+ [PERF_COUNT_HW_VECTOR_OPS] = 0x0710, /* FP_COMP_OPS_EXE.X87|MMX|SSE_FP*/
+};
+
+/*
+ * Generalized hw interrupt event table
+ */
+
+static u64 __read_mostly hw_interrupt_event_ids[PERF_COUNT_HW_INTERRUPT_MAX];
+
+static const u64 nehalem_hw_interrupt_event_ids[] =
+{
+ [PERF_COUNT_HW_INTERRUPT] = 0x011D, /* HW_INT.RCV */
+ [PERF_COUNT_HW_INTERRUPT_MASK] = 0x021D, /* HW_INT.CYCLES_MASKED */
+ [PERF_COUNT_HW_INTERRUPT_PENDING_MASK]= 0x041D, /* HW_INT.CYCLES_PENDING_AND_MASKED*/
+};
+
+static const u64 core2_atom_hw_interrupt_event_ids[] =
+{
+ [PERF_COUNT_HW_INTERRUPT] = 0x00C8, /* HW_INT_RCV */
+ [PERF_COUNT_HW_INTERRUPT_MASK] = 0x01C6, /* CYCLES_INT_MASKED.CYCLES_INT_MASKED*/
+ [PERF_COUNT_HW_INTERRUPT_PENDING_MASK]= 0x02C6, /* CYCLES_INT_MASKED.CYCLES_INT_PENDING_AND_MASKED*/
+};
+
static u64 intel_pmu_raw_event(u64 event)
{
#define CORE_EVNTSEL_EVENT_MASK 0x000000FFULL
@@ -481,6 +517,25 @@ static const u64 amd_hw_cache_event_ids
},
};

+static const u64 amd_hw_vector_event_ids[] =
+{
+ [PERF_COUNT_HW_VECTOR_ADD] = 0x0100, /* Dispatched FPU Add */
+ [PERF_COUNT_HW_VECTOR_MULTIPLY] = 0x0200, /* Dispatched FPU Multiply */
+ [PERF_COUNT_HW_VECTOR_DIVIDE] = 0x0400, /* Dispatched FPU Store */
+ [PERF_COUNT_HW_VECTOR_IDLE_CYCLES] = 0x0001, /* FPU Empty cycles */
+ [PERF_COUNT_HW_VECTOR_STALL_CYCLES] = 0x00D7, /* Dispatch stall for FPU */
+ [PERF_COUNT_HW_VECTOR_OPS] = 0x0FCB, /* Retired x87|(MMX & 3Dnow)
+ |SSE & SSE2) Instructions */
+};
+
+
+static const u64 amd_hw_interrupt_event_ids[] =
+{
+ [PERF_COUNT_HW_INTERRUPT] = 0x00CF, /* Interrupts Taken */
+ [PERF_COUNT_HW_INTERRUPT_MASK] = 0x00CD, /* Interrupts-Masked Cycles*/
+ [PERF_COUNT_HW_INTERRUPT_PENDING_MASK]= 0x00CE, /* Int Mask+Pending Cycles */
+};
+
/*
* AMD Performance Monitor K7 and later.
*/
@@ -659,6 +714,28 @@ set_ext_hw_attr(struct hw_perf_counter *hwc, struct perf_counter_attr *attr)
return 0;
}

+static inline int
+set_hw_vector_attr(struct hw_perf_counter *hwc, struct perf_counter_attr *attr)
+{
+ if (attr->config >= PERF_COUNT_HW_VECTOR_MAX)
+ return -EINVAL;
+
+ hwc->config |= hw_vector_event_ids[attr->config];
+
+ return 0;
+}
+
+static inline int
+set_hw_interrupt_attr(struct hw_perf_counter *hwc, struct perf_counter_attr *attr)
+{
+ if (attr->config >= PERF_COUNT_HW_INTERRUPT_MAX)
+ return -EINVAL;
+
+ hwc->config |= hw_interrupt_event_ids[attr->config];
+
+ return 0;
+}
+
/*
* Setup the hardware configuration for a given attr_type
*/
@@ -716,6 +793,12 @@ static int __hw_perf_counter_init(struct perf_counter *counter)
if (attr->type == PERF_TYPE_HW_CACHE)
return set_ext_hw_attr(hwc, attr);

+ if (attr->type == PERF_TYPE_HW_VECTOR)
+ return set_hw_vector_attr(hwc, attr);
+
+ if (attr->type == PERF_TYPE_HW_INTERRUPT)
+ return set_hw_interrupt_attr(hwc, attr);
+
if (attr->config >= x86_pmu.max_events)
return -EINVAL;
/*
@@ -1437,6 +1520,8 @@ static int intel_pmu_init(void)
case 29: /* six-core 45 nm xeon "Dunnington" */
memcpy(hw_cache_event_ids, core2_hw_cache_event_ids,
sizeof(hw_cache_event_ids));
+ memcpy(hw_interrupt_event_ids, core2_atom_hw_interrupt_event_ids,
+ sizeof(hw_interrupt_event_ids));

pr_cont("Core2 events, ");
break;
@@ -1444,12 +1529,18 @@ static int intel_pmu_init(void)
case 26:
memcpy(hw_cache_event_ids, nehalem_hw_cache_event_ids,
sizeof(hw_cache_event_ids));
+ memcpy(hw_vector_event_ids, nehalem_hw_vector_event_ids,
+ sizeof(hw_vector_event_ids));
+ memcpy(hw_interrupt_event_ids, nehalem_hw_interrupt_event_ids,
+ sizeof(hw_interrupt_event_ids));

pr_cont("Nehalem/Corei7 events, ");
break;
case 28:
memcpy(hw_cache_event_ids, atom_hw_cache_event_ids,
sizeof(hw_cache_event_ids));
+ memcpy(hw_interrupt_event_ids, core2_atom_hw_interrupt_event_ids,
+ sizeof(hw_interrupt_event_ids));

pr_cont("Atom events, ");
break;
@@ -1468,6 +1559,10 @@ static int amd_pmu_init(void)
/* Events are common for all AMDs */
memcpy(hw_cache_event_ids, amd_hw_cache_event_ids,
sizeof(hw_cache_event_ids));
+ memcpy(hw_vector_event_ids, amd_hw_vector_event_ids,
+ sizeof(hw_vector_event_ids));
+ memcpy(hw_interrupt_event_ids, amd_hw_interrupt_event_ids,
+ sizeof(hw_interrupt_event_ids));

return 0;
}
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index 5e970c7..c7165b9 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -31,6 +31,8 @@ enum perf_type_id {
PERF_TYPE_TRACEPOINT = 2,
PERF_TYPE_HW_CACHE = 3,
PERF_TYPE_RAW = 4,
+ PERF_TYPE_HW_VECTOR = 5,
+ PERF_TYPE_HW_INTERRUPT = 6,

PERF_TYPE_MAX, /* non-ABI */
};
@@ -89,6 +91,31 @@ enum perf_hw_cache_op_result_id {
};

/*
+ * Generalized hardware vectored co-processor counters:
+ */
+enum perf_hw_vector_id {
+ PERF_COUNT_HW_VECTOR_ADD = 0,
+ PERF_COUNT_HW_VECTOR_MULTIPLY = 1,
+ PERF_COUNT_HW_VECTOR_DIVIDE = 2,
+ PERF_COUNT_HW_VECTOR_IDLE_CYCLES = 3,
+ PERF_COUNT_HW_VECTOR_STALL_CYCLES = 4,
+ PERF_COUNT_HW_VECTOR_OPS = 5,
+
+ PERF_COUNT_HW_VECTOR_MAX, /* non-ABI */
+};
+
+/*
+ * Generalized hardware inturrupt counters:
+ */
+enum perf_hw_interrupt_id {
+ PERF_COUNT_HW_INTERRUPT = 0,
+ PERF_COUNT_HW_INTERRUPT_MASK = 1,
+ PERF_COUNT_HW_INTERRUPT_PENDING_MASK = 2,
+
+ PERF_COUNT_HW_INTERRUPT_MAX, /* non-ABI */
+};
+
+/*
* Special "software" counters provided by the kernel, even if the hardware
* does not support performance counters. These counters measure various
* physical and sw events of the kernel (and allow the profiling of them as
diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
index d55a50d..7a529a8 100644
--- a/kernel/perf_counter.c
+++ b/kernel/perf_counter.c
@@ -3838,6 +3838,8 @@ perf_counter_alloc(struct perf_counter_attr *attr,
case PERF_TYPE_RAW:
case PERF_TYPE_HARDWARE:
case PERF_TYPE_HW_CACHE:
+ case PERF_TYPE_HW_VECTOR:
+ case PERF_TYPE_HW_INTERRUPT:
pmu = hw_perf_counter_init(counter);
break;

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 2e03524..af61c29 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -96,6 +96,10 @@ static u64 walltime_nsecs_noise;
static u64 runtime_cycles_avg;
static u64 runtime_cycles_noise;

+#define MATCH_EVENT(t, c, counter) \
+ (attrs[counter].type == PERF_TYPE_##t && \
+ attrs[counter].config == PERF_COUNT_##c)
+
#define ERR_PERF_OPEN \
"Error: counter %d, sys_perf_counter_open() syscall returned with %d (%s)\n"

@@ -132,13 +136,31 @@ static void create_perf_stat_counter(int counter, int pid)
*/
static inline int nsec_counter(int counter)
{
- if (attrs[counter].type != PERF_TYPE_SOFTWARE)
- return 0;
+ if (MATCH_EVENT(SOFTWARE, SW_CPU_CLOCK, counter) ||
+ MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter))
+ return 1;
+
+ return 0;
+}

- if (attrs[counter].config == PERF_COUNT_SW_CPU_CLOCK)
+/*
+ * Does the counter have cycles as a unit?
+ */
+static inline int cycle_counter(int counter)
+{
+ if (MATCH_EVENT(HARDWARE, HW_CPU_CYCLES, counter) ||
+ MATCH_EVENT(HARDWARE, HW_BUS_CYCLES, counter))
return 1;

- if (attrs[counter].config == PERF_COUNT_SW_TASK_CLOCK)
+ return 0;
+}
+
+/*
+ * Does the counter have instructions as a unit?
+ */
+static inline int instruction_counter(int counter)
+{
+ if (MATCH_EVENT(HARDWARE, HW_INSTRUCTIONS, counter))
return 1;

return 0;
@@ -192,11 +214,9 @@ static void read_counter(int counter)
/*
* Save the full runtime - to allow normalization during printout:
*/
- if (attrs[counter].type == PERF_TYPE_SOFTWARE &&
- attrs[counter].config == PERF_COUNT_SW_TASK_CLOCK)
+ if (nsec_counter(counter))
runtime_nsecs[run_idx] = count[0];
- if (attrs[counter].type == PERF_TYPE_HARDWARE &&
- attrs[counter].config == PERF_COUNT_HW_CPU_CYCLES)
+ else if (cycle_counter(counter))
runtime_cycles[run_idx] = count[0];
}

@@ -290,13 +310,10 @@ static void nsec_printout(int counter, u64 *count, u64 *noise)

fprintf(stderr, " %14.6f %-24s", msecs, event_name(counter));

- if (attrs[counter].type == PERF_TYPE_SOFTWARE &&
- attrs[counter].config == PERF_COUNT_SW_TASK_CLOCK) {
+ if (nsec_counter(counter) && walltime_nsecs_avg)
+ fprintf(stderr, " # %10.3f CPUs ",
+ (double)count[0] / (double)walltime_nsecs_avg);

- if (walltime_nsecs_avg)
- fprintf(stderr, " # %10.3f CPUs ",
- (double)count[0] / (double)walltime_nsecs_avg);
- }
print_noise(count, noise);
}

@@ -304,18 +321,13 @@ static void abs_printout(int counter, u64 *count, u64 *noise)
{
fprintf(stderr, " %14Ld %-24s", count[0], event_name(counter));

- if (runtime_cycles_avg &&
- attrs[counter].type == PERF_TYPE_HARDWARE &&
- attrs[counter].config == PERF_COUNT_HW_INSTRUCTIONS) {
-
+ if (instruction_counter(counter) && runtime_cycles_avg)
fprintf(stderr, " # %10.3f IPC ",
(double)count[0] / (double)runtime_cycles_avg);
- } else {
- if (runtime_nsecs_avg) {
- fprintf(stderr, " # %10.3f M/sec",
- (double)count[0]/runtime_nsecs_avg*1000.0);
- }
- }
+ else if (runtime_nsecs_avg)
+ fprintf(stderr, " # %10.3f M/sec",
+ (double)count[0]/runtime_nsecs_avg*1000.0);
+
print_noise(count, noise);
}

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 4d042f1..5ea4c12 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -40,6 +40,25 @@ static struct event_symbol event_symbols[] = {
{ CSW(CPU_MIGRATIONS), "cpu-migrations", "migrations" },
};

+#define CHVECTOR(x) .type = PERF_TYPE_HW_VECTOR, .config = PERF_COUNT_HW_VECTOR_##x
+
+static struct event_symbol vector_event_symbols[] = {
+ { CHVECTOR(ADD), "vec-adds", "add" },
+ { CHVECTOR(MULTIPLY), "vec-muls", "multiply" },
+ { CHVECTOR(DIVIDE), "vec-divs", "divide" },
+ { CHVECTOR(IDLE_CYCLES), "vec-idle-cycles", "vec-empty-cycles"},
+ { CHVECTOR(STALL_CYCLES), "vec-stall-cycles", "vec-busy-cycles"},
+ { CHVECTOR(OPS), "vec-ops", "vec-operations"},
+};
+
+#define CHINT(x) .type = PERF_TYPE_HW_INTERRUPT, .config = PERF_COUNT_HW_##x
+
+static struct event_symbol interrupt_event_symbols[] = {
+ { CHINT(INTERRUPT), "interrupts", "interrupt" },
+ { CHINT(INTERRUPT_MASK), "int-mask-cycles", "masked" },
+ { CHINT(INTERRUPT_PENDING_MASK),"int-pending-mask-cycles", "" },
+};
+
#define __PERF_COUNTER_FIELD(config, name) \
((config & PERF_COUNTER_##name##_MASK) >> PERF_COUNTER_##name##_SHIFT)

@@ -172,6 +191,16 @@ char *event_name(int counter)
return event_cache_name(cache_type, cache_op, cache_result);
}

+ case PERF_TYPE_HW_VECTOR:
+ if (config < PERF_COUNT_HW_VECTOR_MAX)
+ return vector_event_symbols[config].symbol;
+ return "unknown-vector";
+
+ case PERF_TYPE_HW_INTERRUPT:
+ if (config < PERF_COUNT_HW_INTERRUPT_MAX)
+ return interrupt_event_symbols[config].symbol;
+ return "unknown-interrupt";
+
case PERF_TYPE_SOFTWARE:
if (config < PERF_COUNT_SW_MAX)
return sw_event_names[config];
@@ -250,6 +279,32 @@ static int check_events(const char *str, unsigned int i)
return 0;
}

+static int check_vector_events(const char *str, unsigned int i)
+{
+ if (!strncmp(str, vector_event_symbols[i].symbol,
+ strlen(vector_event_symbols[i].symbol)))
+ return 1;
+
+ if (strlen(vector_event_symbols[i].alias))
+ if (!strncmp(str, vector_event_symbols[i].alias,
+ strlen(vector_event_symbols[i].alias)))
+ return 1;
+ return 0;
+}
+
+static int check_interrupt_events(const char *str, unsigned int i)
+{
+ if (!strncmp(str, interrupt_event_symbols[i].symbol,
+ strlen(interrupt_event_symbols[i].symbol)))
+ return 1;
+
+ if (strlen(interrupt_event_symbols[i].alias))
+ if (!strncmp(str, interrupt_event_symbols[i].alias,
+ strlen(interrupt_event_symbols[i].alias)))
+ return 1;
+ return 0;
+}
+
/*
* Each event can have multiple symbolic names.
* Symbolic names are (almost) exactly matched.
@@ -297,6 +352,24 @@ static int parse_event_symbols(const char *str, struct perf_counter_attr *attr)
}
}

+ for (i = 0; i < ARRAY_SIZE(vector_event_symbols); i++) {
+ if (check_vector_events(str, i)) {
+ attr->type = vector_event_symbols[i].type;
+ attr->config = vector_event_symbols[i].config;
+
+ return 0;
+ }
+ }
+
+ for (i = 0; i < ARRAY_SIZE(interrupt_event_symbols); i++) {
+ if (check_interrupt_events(str, i)) {
+ attr->type = interrupt_event_symbols[i].type;
+ attr->config = interrupt_event_symbols[i].config;
+
+ return 0;
+ }
+ }
+
return parse_generic_hw_symbols(str, attr);
}




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