Re: [PATCH 3/6] perf mem: Clean up perf_mem_events__name()

From: Liang, Kan
Date: Wed Dec 06 2023 - 16:52:52 EST

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On 2023-12-06 4:07 p.m., Ian Rogers wrote:
> On Wed, Dec 6, 2023 at 12:13 PM <kan.liang@xxxxxxxxxxxxxxx> wrote:
>>
>> From: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
>>
>> Introduce a generic perf_mem_events__name(). Remove the ARCH-specific
>> one.
>>
>> The mem_load events may have a different format. Add ldlat and aux_event
>> in the struct perf_mem_event to indicate the format and the extra aux
>> event.
>>
>> Add perf_mem_events_intel_aux[] to support the extra mem_load_aux event.
>>
>> Signed-off-by: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
>> ---
>> tools/perf/arch/arm64/util/mem-events.c | 26 ++-------
>> tools/perf/arch/powerpc/util/mem-events.c | 13 ++---
>> tools/perf/arch/powerpc/util/mem-events.h | 7 +++
>> tools/perf/arch/powerpc/util/pmu.c | 11 ++++
>> tools/perf/arch/x86/util/mem-events.c | 70 +++++------------------
>> tools/perf/arch/x86/util/mem-events.h | 1 +
>> tools/perf/arch/x86/util/pmu.c | 8 ++-
>> tools/perf/util/mem-events.c | 56 ++++++++++++------
>> tools/perf/util/mem-events.h | 3 +-
>> 9 files changed, 89 insertions(+), 106 deletions(-)
>> create mode 100644 tools/perf/arch/powerpc/util/mem-events.h
>> create mode 100644 tools/perf/arch/powerpc/util/pmu.c
>>
>> diff --git a/tools/perf/arch/arm64/util/mem-events.c b/tools/perf/arch/arm64/util/mem-events.c
>> index 2602e8688727..eb2ef84f0fc8 100644
>> --- a/tools/perf/arch/arm64/util/mem-events.c
>> +++ b/tools/perf/arch/arm64/util/mem-events.c
>> @@ -2,28 +2,10 @@
>> #include "map_symbol.h"
>> #include "mem-events.h"
>>
>> -#define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
>> +#define E(t, n, s, l, a) { .tag = t, .name = n, .sysfs_name = s, .ldlat = l, .aux_event = a }
>>
>> struct perf_mem_event perf_mem_events_arm[PERF_MEM_EVENTS__MAX] = {
>> - E("spe-load", "arm_spe_0/ts_enable=1,pa_enable=1,load_filter=1,store_filter=0,min_latency=%u/", "arm_spe_0"),
>> - E("spe-store", "arm_spe_0/ts_enable=1,pa_enable=1,load_filter=0,store_filter=1/", "arm_spe_0"),
>> - E("spe-ldst", "arm_spe_0/ts_enable=1,pa_enable=1,load_filter=1,store_filter=1,min_latency=%u/", "arm_spe_0"),
>> + E("spe-load", "%s/ts_enable=1,pa_enable=1,load_filter=1,store_filter=0,min_latency=%u/", "arm_spe_0", true, 0),
>> + E("spe-store", "%s/ts_enable=1,pa_enable=1,load_filter=0,store_filter=1/", "arm_spe_0", false, 0),
>> + E("spe-ldst", "%s/ts_enable=1,pa_enable=1,load_filter=1,store_filter=1,min_latency=%u/", "arm_spe_0", true, 0),
>> };
>> -
>> -static char mem_ev_name[100];
>> -
>> -const char *perf_mem_events__name(int i, const char *pmu_name __maybe_unused)
>> -{
>> - struct perf_mem_event *e = &perf_mem_events_arm[i];
>> -
>> - if (i >= PERF_MEM_EVENTS__MAX)
>> - return NULL;
>> -
>> - if (i == PERF_MEM_EVENTS__LOAD || i == PERF_MEM_EVENTS__LOAD_STORE)
>> - scnprintf(mem_ev_name, sizeof(mem_ev_name),
>> - e->name, perf_mem_events__loads_ldlat);
>> - else /* PERF_MEM_EVENTS__STORE */
>> - scnprintf(mem_ev_name, sizeof(mem_ev_name), e->name);
>> -
>> - return mem_ev_name;
>> -}
>> diff --git a/tools/perf/arch/powerpc/util/mem-events.c b/tools/perf/arch/powerpc/util/mem-events.c
>> index 78b986e5268d..b7883e38950f 100644
>> --- a/tools/perf/arch/powerpc/util/mem-events.c
>> +++ b/tools/perf/arch/powerpc/util/mem-events.c
>> @@ -2,11 +2,10 @@
>> #include "map_symbol.h"
>> #include "mem-events.h"
>>
>> -/* PowerPC does not support 'ldlat' parameter. */
>> -const char *perf_mem_events__name(int i, const char *pmu_name __maybe_unused)
>> -{
>> - if (i == PERF_MEM_EVENTS__LOAD)
>> - return "cpu/mem-loads/";
>> +#define E(t, n, s, l, a) { .tag = t, .name = n, .sysfs_name = s, .ldlat = l, .aux_event = a }
>>
>> - return "cpu/mem-stores/";
>> -}
>> +struct perf_mem_event perf_mem_events_power[PERF_MEM_EVENTS__MAX] = {
>> + E("ldlat-loads", "%s/mem-loads/", "cpu/events/mem-loads", false, 0),
>> + E("ldlat-stores", "%s/mem-stores/", "cpu/events/mem-stores", false, 0),
>> + E(NULL, NULL, NULL, false, 0),
>> +};
>> diff --git a/tools/perf/arch/powerpc/util/mem-events.h b/tools/perf/arch/powerpc/util/mem-events.h
>> new file mode 100644
>> index 000000000000..6acc3d1b6873
>> --- /dev/null
>> +++ b/tools/perf/arch/powerpc/util/mem-events.h
>> @@ -0,0 +1,7 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +#ifndef _POWER_MEM_EVENTS_H
>> +#define _POWER_MEM_EVENTS_H
>> +
>> +extern struct perf_mem_event perf_mem_events_power[PERF_MEM_EVENTS__MAX];
>> +
>> +#endif /* _POWER_MEM_EVENTS_H */
>> diff --git a/tools/perf/arch/powerpc/util/pmu.c b/tools/perf/arch/powerpc/util/pmu.c
>> new file mode 100644
>> index 000000000000..168173f88ddb
>> --- /dev/null
>> +++ b/tools/perf/arch/powerpc/util/pmu.c
>> @@ -0,0 +1,11 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +
>> +#include <string.h>
>> +
>> +#include "../../../util/pmu.h"
>> +
>> +void perf_pmu__arch_init(struct perf_pmu *pmu)
>> +{
>> + if (pmu->is_core)
>> + pmu->mem_events = perf_mem_events_power;
>> +}
>> diff --git a/tools/perf/arch/x86/util/mem-events.c b/tools/perf/arch/x86/util/mem-events.c
>> index 5fb41d50118d..f0e66a0151a0 100644
>> --- a/tools/perf/arch/x86/util/mem-events.c
>> +++ b/tools/perf/arch/x86/util/mem-events.c
>> @@ -7,25 +7,26 @@
>> #include "linux/string.h"
>> #include "env.h"
>>
>> -static char mem_loads_name[100];
>> -static bool mem_loads_name__init;
>> -static char mem_stores_name[100];
>> -
>> #define MEM_LOADS_AUX 0x8203
>> -#define MEM_LOADS_AUX_NAME "{%s/mem-loads-aux/,%s/mem-loads,ldlat=%u/}:P"
>>
>> -#define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
>> +#define E(t, n, s, l, a) { .tag = t, .name = n, .sysfs_name = s, .ldlat = l, .aux_event = a }
>>
>> struct perf_mem_event perf_mem_events_intel[PERF_MEM_EVENTS__MAX] = {
>> - E("ldlat-loads", "%s/mem-loads,ldlat=%u/P", "%s/events/mem-loads"),
>> - E("ldlat-stores", "%s/mem-stores/P", "%s/events/mem-stores"),
>> - E(NULL, NULL, NULL),
>> + E("ldlat-loads", "%s/mem-loads,ldlat=%u/P", "%s/events/mem-loads", true, 0),
>> + E("ldlat-stores", "%s/mem-stores/P", "%s/events/mem-stores", false, 0),
>> + E(NULL, NULL, NULL, false, 0),
>> +};
>> +
>> +struct perf_mem_event perf_mem_events_intel_aux[PERF_MEM_EVENTS__MAX] = {
>> + E("ldlat-loads", "{%s/mem-loads-aux/,%s/mem-loads,ldlat=%u/}:P", "%s/events/mem-loads", true, MEM_LOADS_AUX),
>> + E("ldlat-stores", "%s/mem-stores/P", "%s/events/mem-stores", false, 0),
>> + E(NULL, NULL, NULL, false, 0),
>> };
>>
>> struct perf_mem_event perf_mem_events_amd[PERF_MEM_EVENTS__MAX] = {
>> - E(NULL, NULL, NULL),
>> - E(NULL, NULL, NULL),
>> - E("mem-ldst", "ibs_op//", "ibs_op"),
>> + E(NULL, NULL, NULL, false, 0),
>> + E(NULL, NULL, NULL, false, 0),
>> + E("mem-ldst", "%s//", "ibs_op", false, 0),
>> };
>>
>> bool is_mem_loads_aux_event(struct evsel *leader)
>> @@ -40,48 +41,3 @@ bool is_mem_loads_aux_event(struct evsel *leader)
>>
>> return leader->core.attr.config == MEM_LOADS_AUX;
>> }
>> -
>> -const char *perf_mem_events__name(int i, const char *pmu_name)
>> -{
>> - struct perf_mem_event *e;
>> -
>> - if (x86__is_amd_cpu())
>> - e = &perf_mem_events_amd[i];
>> - else
>> - e = &perf_mem_events_intel[i];
>> -
>> - if (!e)
>> - return NULL;
>> -
>> - if (i == PERF_MEM_EVENTS__LOAD) {
>> - if (mem_loads_name__init && !pmu_name)
>> - return mem_loads_name;
>> -
>> - if (!pmu_name) {
>> - mem_loads_name__init = true;
>> - pmu_name = "cpu";
>> - }
>> -
>> - if (perf_pmus__have_event(pmu_name, "mem-loads-aux")) {
>> - scnprintf(mem_loads_name, sizeof(mem_loads_name),
>> - MEM_LOADS_AUX_NAME, pmu_name, pmu_name,
>> - perf_mem_events__loads_ldlat);
>> - } else {
>> - scnprintf(mem_loads_name, sizeof(mem_loads_name),
>> - e->name, pmu_name,
>> - perf_mem_events__loads_ldlat);
>> - }
>> - return mem_loads_name;
>> - }
>> -
>> - if (i == PERF_MEM_EVENTS__STORE) {
>> - if (!pmu_name)
>> - pmu_name = "cpu";
>> -
>> - scnprintf(mem_stores_name, sizeof(mem_stores_name),
>> - e->name, pmu_name);
>> - return mem_stores_name;
>> - }
>> -
>> - return e->name;
>> -}
>> diff --git a/tools/perf/arch/x86/util/mem-events.h b/tools/perf/arch/x86/util/mem-events.h
>> index 3959e427f482..f55c8d3b7d59 100644
>> --- a/tools/perf/arch/x86/util/mem-events.h
>> +++ b/tools/perf/arch/x86/util/mem-events.h
>> @@ -3,6 +3,7 @@
>> #define _X86_MEM_EVENTS_H
>>
>> extern struct perf_mem_event perf_mem_events_intel[PERF_MEM_EVENTS__MAX];
>> +extern struct perf_mem_event perf_mem_events_intel_aux[PERF_MEM_EVENTS__MAX];
>>
>> extern struct perf_mem_event perf_mem_events_amd[PERF_MEM_EVENTS__MAX];
>>
>> diff --git a/tools/perf/arch/x86/util/pmu.c b/tools/perf/arch/x86/util/pmu.c
>> index 7e69f4f2e363..446f8197aae4 100644
>> --- a/tools/perf/arch/x86/util/pmu.c
>> +++ b/tools/perf/arch/x86/util/pmu.c
>> @@ -35,8 +35,12 @@ void perf_pmu__arch_init(struct perf_pmu *pmu __maybe_unused)
>> if (x86__is_amd_cpu()) {
>> if (strcmp(pmu->name, "ibs_op"))
>> pmu->mem_events = perf_mem_events_amd;
>> - } else if (pmu->is_core)
>> - pmu->mem_events = perf_mem_events_intel;
>> + } else if (pmu->is_core) {
>> + if (perf_pmu__have_event(pmu, "mem-loads-aux"))
>> + pmu->mem_events = perf_mem_events_intel_aux;
>> + else
>> + pmu->mem_events = perf_mem_events_intel;
>> + }
>> }
>>
>> int perf_pmus__num_mem_pmus(void)
>> diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
>> index 887ffdcce338..3a60cbcd6d8e 100644
>> --- a/tools/perf/util/mem-events.c
>> +++ b/tools/perf/util/mem-events.c
>> @@ -17,17 +17,17 @@
>>
>> unsigned int perf_mem_events__loads_ldlat = 30;
>>
>> -#define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
>> +#define E(t, n, s, l, a) { .tag = t, .name = n, .sysfs_name = s, .ldlat = l, .aux_event = a }
>>
>> struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
>> - E("ldlat-loads", "cpu/mem-loads,ldlat=%u/P", "cpu/events/mem-loads"),
>> - E("ldlat-stores", "cpu/mem-stores/P", "cpu/events/mem-stores"),
>> - E(NULL, NULL, NULL),
>> + E("ldlat-loads", "%s/mem-loads/,ldlat=%u/P", "cpu/events/mem-loads", true, 0),
>
> Is there a mistake here "/," looks like it should just be ",".

Right, a typo. I will fix it in V2.

Thanks,
Kan
>
> Thanks,
> Ian
>
>> + E("ldlat-stores", "%s/mem-stores/P", "cpu/events/mem-stores", false, 0),
>> + E(NULL, NULL, NULL, false, 0),
>> };
>> #undef E
>>
>> static char mem_loads_name[100];
>> -static bool mem_loads_name__init;
>> +static char mem_stores_name[100];
>>
>> struct perf_mem_event *perf_mem_events__ptr(struct perf_pmu *pmu, int i)
>> {
>> @@ -62,23 +62,45 @@ struct perf_pmu *perf_mem_events_find_pmu(void)
>> return perf_pmus__scan_mem(NULL);
>> }
>>
>> -const char * __weak perf_mem_events__name(int i, const char *pmu_name __maybe_unused)
>> +static const char *perf_mem_events__name(int i, struct perf_pmu *pmu)
>> {
>> - struct perf_mem_event *e = &perf_mem_events[i];
>> + struct perf_mem_event *e = &pmu->mem_events[i];
>>
>> if (!e)
>> return NULL;
>>
>> - if (i == PERF_MEM_EVENTS__LOAD) {
>> - if (!mem_loads_name__init) {
>> - mem_loads_name__init = true;
>> - scnprintf(mem_loads_name, sizeof(mem_loads_name),
>> - e->name, perf_mem_events__loads_ldlat);
>> + if (i == PERF_MEM_EVENTS__LOAD || i == PERF_MEM_EVENTS__LOAD_STORE) {
>> + if (e->ldlat) {
>> + if (!e->aux_event) {
>> + /* ARM and Most of Intel */
>> + scnprintf(mem_loads_name, sizeof(mem_loads_name),
>> + e->name, pmu->name,
>> + perf_mem_events__loads_ldlat);
>> + } else {
>> + /* Intel with mem-loads-aux event */
>> + scnprintf(mem_loads_name, sizeof(mem_loads_name),
>> + e->name, pmu->name, pmu->name,
>> + perf_mem_events__loads_ldlat);
>> + }
>> + } else {
>> + if (!e->aux_event) {
>> + /* AMD and POWER */
>> + scnprintf(mem_loads_name, sizeof(mem_loads_name),
>> + e->name, pmu->name);
>> + } else
>> + return NULL;
>> }
>> +
>> return mem_loads_name;
>> }
>>
>> - return e->name;
>> + if (i == PERF_MEM_EVENTS__STORE) {
>> + scnprintf(mem_stores_name, sizeof(mem_stores_name),
>> + e->name, pmu->name);
>> + return mem_stores_name;
>> + }
>> +
>> + return NULL;
>> }
>>
>> __weak bool is_mem_loads_aux_event(struct evsel *leader __maybe_unused)
>> @@ -175,7 +197,7 @@ void perf_mem_events__list(struct perf_pmu *pmu)
>> e->tag ? 13 : 0,
>> e->tag ? : "",
>> e->tag && verbose > 0 ? 25 : 0,
>> - e->tag && verbose > 0 ? perf_mem_events__name(j, NULL) : "",
>> + e->tag && verbose > 0 ? perf_mem_events__name(j, pmu) : "",
>> e->supported ? ": available\n" : "");
>> }
>> }
>> @@ -198,15 +220,15 @@ int perf_mem_events__record_args(const char **rec_argv, int *argv_nr,
>>
>> if (!e->supported) {
>> pr_err("failed: event '%s' not supported\n",
>> - perf_mem_events__name(j, pmu->name));
>> + perf_mem_events__name(j, pmu));
>> return -1;
>> }
>>
>> if (perf_pmus__num_mem_pmus() == 1) {
>> rec_argv[i++] = "-e";
>> - rec_argv[i++] = perf_mem_events__name(j, NULL);
>> + rec_argv[i++] = perf_mem_events__name(j, pmu);
>> } else {
>> - const char *s = perf_mem_events__name(j, pmu->name);
>> + const char *s = perf_mem_events__name(j, pmu);
>>
>> if (!perf_mem_event__supported(mnt, pmu, e))
>> continue;
>> diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h
>> index 59a4303aac96..d257cf67d6d9 100644
>> --- a/tools/perf/util/mem-events.h
>> +++ b/tools/perf/util/mem-events.h
>> @@ -14,6 +14,8 @@
>> struct perf_mem_event {
>> bool record;
>> bool supported;
>> + bool ldlat;
>> + u32 aux_event;
>> const char *tag;
>> const char *name;
>> const char *sysfs_name;
>> @@ -39,7 +41,6 @@ extern struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX];
>> int perf_mem_events__parse(struct perf_pmu *pmu, const char *str);
>> int perf_mem_events__init(struct perf_pmu *pmu);
>>
>> -const char *perf_mem_events__name(int i, const char *pmu_name);
>> struct perf_mem_event *perf_mem_events__ptr(struct perf_pmu *pmu, int i);
>> struct perf_pmu *perf_mem_events_find_pmu(void);
>> bool is_mem_loads_aux_event(struct evsel *leader);
>> --
>> 2.35.1
>>

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