[1/6] perf mem: Add mem_events into the supported perf_pmu

  From: Kan Liang <kan.liang@linux.intel.com>

With the mem_events, perf doesn't need to read sysfs for each PMU to
find the mem-events-supported PMU. The patch also makes it possible to
clean up the related __weak functions later.

The patch is only to add the mem_events into the perf_pmu for all ARCHs.
It will be used in the later cleanup patches.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---
 tools/perf/arch/arm64/util/mem-events.c | 4 ++--
 tools/perf/arch/arm64/util/mem-events.h | 7 +++++++
 tools/perf/arch/arm64/util/pmu.c        | 6 ++++++
 tools/perf/arch/s390/util/pmu.c         | 3 +++
 tools/perf/arch/x86/util/mem-events.c   | 4 ++--
 tools/perf/arch/x86/util/mem-events.h   | 9 +++++++++
 tools/perf/arch/x86/util/pmu.c          | 7 +++++++
 tools/perf/util/mem-events.c            | 2 +-
 tools/perf/util/mem-events.h            | 1 +
 tools/perf/util/pmu.c                   | 4 +++-
 tools/perf/util/pmu.h                   | 7 +++++++
 11 files changed, 48 insertions(+), 6 deletions(-)
 create mode 100644 tools/perf/arch/arm64/util/mem-events.h
 create mode 100644 tools/perf/arch/x86/util/mem-events.h
  

On Wed, Dec 6, 2023 at 12:13 PM <kan.liang@linux.intel.com> wrote:
>
> From: Kan Liang <kan.liang@linux.intel.com>
>
> With the mem_events, perf doesn't need to read sysfs for each PMU to
> find the mem-events-supported PMU. The patch also makes it possible to
> clean up the related __weak functions later.
>
> The patch is only to add the mem_events into the perf_pmu for all ARCHs.
> It will be used in the later cleanup patches.
>
> Signed-off-by: Kan Liang <kan.liang@linux.intel.com>

Reviewed-by: Ian Rogers <irogers@google.com>

> ---
>  tools/perf/arch/arm64/util/mem-events.c | 4 ++--
>  tools/perf/arch/arm64/util/mem-events.h | 7 +++++++
>  tools/perf/arch/arm64/util/pmu.c        | 6 ++++++
>  tools/perf/arch/s390/util/pmu.c         | 3 +++
>  tools/perf/arch/x86/util/mem-events.c   | 4 ++--
>  tools/perf/arch/x86/util/mem-events.h   | 9 +++++++++
>  tools/perf/arch/x86/util/pmu.c          | 7 +++++++
>  tools/perf/util/mem-events.c            | 2 +-
>  tools/perf/util/mem-events.h            | 1 +
>  tools/perf/util/pmu.c                   | 4 +++-
>  tools/perf/util/pmu.h                   | 7 +++++++
>  11 files changed, 48 insertions(+), 6 deletions(-)
>  create mode 100644 tools/perf/arch/arm64/util/mem-events.h
>  create mode 100644 tools/perf/arch/x86/util/mem-events.h
>
> diff --git a/tools/perf/arch/arm64/util/mem-events.c b/tools/perf/arch/arm64/util/mem-events.c
> index 3bcc5c7035c2..aaa4804922b4 100644
> --- a/tools/perf/arch/arm64/util/mem-events.c
> +++ b/tools/perf/arch/arm64/util/mem-events.c
> @@ -4,7 +4,7 @@
>
>  #define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
>
> -static struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
> +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"),
> @@ -17,7 +17,7 @@ struct perf_mem_event *perf_mem_events__ptr(int i)
>         if (i >= PERF_MEM_EVENTS__MAX)
>                 return NULL;
>
> -       return &perf_mem_events[i];
> +       return &perf_mem_events_arm[i];
>  }
>
>  const char *perf_mem_events__name(int i, const char *pmu_name __maybe_unused)
> diff --git a/tools/perf/arch/arm64/util/mem-events.h b/tools/perf/arch/arm64/util/mem-events.h
> new file mode 100644
> index 000000000000..5fc50be4be38
> --- /dev/null
> +++ b/tools/perf/arch/arm64/util/mem-events.h
> @@ -0,0 +1,7 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef _ARM64_MEM_EVENTS_H
> +#define _ARM64_MEM_EVENTS_H
> +
> +extern struct perf_mem_event perf_mem_events_arm[PERF_MEM_EVENTS__MAX];
> +
> +#endif /* _ARM64_MEM_EVENTS_H */
> diff --git a/tools/perf/arch/arm64/util/pmu.c b/tools/perf/arch/arm64/util/pmu.c
> index 2a4eab2d160e..69673fcf4a61 100644
> --- a/tools/perf/arch/arm64/util/pmu.c
> +++ b/tools/perf/arch/arm64/util/pmu.c
> @@ -8,6 +8,12 @@
>  #include <api/fs/fs.h>
>  #include <math.h>
>
> +void perf_pmu__arch_init(struct perf_pmu *pmu)
> +{
> +       if (strcmp(pmu->name, "arm_spe_0"))
> +               pmu->mem_events = perf_mem_events_arm;
> +}
> +
>  const struct pmu_metrics_table *pmu_metrics_table__find(void)
>  {
>         struct perf_pmu *pmu;
> diff --git a/tools/perf/arch/s390/util/pmu.c b/tools/perf/arch/s390/util/pmu.c
> index 886c30e001fa..225d7dc2379c 100644
> --- a/tools/perf/arch/s390/util/pmu.c
> +++ b/tools/perf/arch/s390/util/pmu.c
> @@ -19,4 +19,7 @@ void perf_pmu__arch_init(struct perf_pmu *pmu)
>             !strcmp(pmu->name, S390_PMUPAI_EXT) ||
>             !strcmp(pmu->name, S390_PMUCPUM_CF))
>                 pmu->selectable = true;
> +
> +       if (pmu->is_core)
> +               pmu->mem_events = perf_mem_events;
>  }
> diff --git a/tools/perf/arch/x86/util/mem-events.c b/tools/perf/arch/x86/util/mem-events.c
> index 191b372f9a2d..2b81d229982c 100644
> --- a/tools/perf/arch/x86/util/mem-events.c
> +++ b/tools/perf/arch/x86/util/mem-events.c
> @@ -16,13 +16,13 @@ static char mem_stores_name[100];
>
>  #define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
>
> -static struct perf_mem_event perf_mem_events_intel[PERF_MEM_EVENTS__MAX] = {
> +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),
>  };
>
> -static struct perf_mem_event perf_mem_events_amd[PERF_MEM_EVENTS__MAX] = {
> +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"),
> diff --git a/tools/perf/arch/x86/util/mem-events.h b/tools/perf/arch/x86/util/mem-events.h
> new file mode 100644
> index 000000000000..3959e427f482
> --- /dev/null
> +++ b/tools/perf/arch/x86/util/mem-events.h
> @@ -0,0 +1,9 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef _X86_MEM_EVENTS_H
> +#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_amd[PERF_MEM_EVENTS__MAX];
> +
> +#endif /* _X86_MEM_EVENTS_H */
> diff --git a/tools/perf/arch/x86/util/pmu.c b/tools/perf/arch/x86/util/pmu.c
> index 469555ae9b3c..7e69f4f2e363 100644
> --- a/tools/perf/arch/x86/util/pmu.c
> +++ b/tools/perf/arch/x86/util/pmu.c
> @@ -15,6 +15,7 @@
>  #include "../../../util/pmu.h"
>  #include "../../../util/fncache.h"
>  #include "../../../util/pmus.h"
> +#include "mem-events.h"
>  #include "env.h"
>
>  void perf_pmu__arch_init(struct perf_pmu *pmu __maybe_unused)
> @@ -30,6 +31,12 @@ void perf_pmu__arch_init(struct perf_pmu *pmu __maybe_unused)
>                 pmu->selectable = true;
>         }
>  #endif
> +
> +       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;
>  }
>
>  int perf_pmus__num_mem_pmus(void)
> diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
> index 3a2e3687878c..0a8f415f5efe 100644
> --- a/tools/perf/util/mem-events.c
> +++ b/tools/perf/util/mem-events.c
> @@ -19,7 +19,7 @@ unsigned int perf_mem_events__loads_ldlat = 30;
>
>  #define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
>
> -static struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
> +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),
> diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h
> index b40ad6ea93fc..8c5694b2d0b0 100644
> --- a/tools/perf/util/mem-events.h
> +++ b/tools/perf/util/mem-events.h
> @@ -34,6 +34,7 @@ enum {
>  };
>
>  extern unsigned int perf_mem_events__loads_ldlat;
> +extern struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX];
>
>  int perf_mem_events__parse(const char *str);
>  int perf_mem_events__init(void);
> diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
> index 3c9609944a2f..3d4373b8ab63 100644
> --- a/tools/perf/util/pmu.c
> +++ b/tools/perf/util/pmu.c
> @@ -986,8 +986,10 @@ static int pmu_max_precise(int dirfd, struct perf_pmu *pmu)
>  }
>
>  void __weak
> -perf_pmu__arch_init(struct perf_pmu *pmu __maybe_unused)
> +perf_pmu__arch_init(struct perf_pmu *pmu)
>  {
> +       if (pmu->is_core)
> +               pmu->mem_events = perf_mem_events;
>  }
>
>  struct perf_pmu *perf_pmu__lookup(struct list_head *pmus, int dirfd, const char *name)
> diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
> index 424c3fee0949..e35d985206db 100644
> --- a/tools/perf/util/pmu.h
> +++ b/tools/perf/util/pmu.h
> @@ -10,6 +10,8 @@
>  #include <stdio.h>
>  #include "parse-events.h"
>  #include "pmu-events/pmu-events.h"
> +#include "map_symbol.h"

nit: unused?

> +#include "mem-events.h"
>
>  struct evsel_config_term;
>  struct perf_cpu_map;
> @@ -162,6 +164,11 @@ struct perf_pmu {
>                  */
>                 bool exclude_guest;
>         } missing_features;
> +
> +       /**
> +        * @mem_events: List of the supported mem events
> +        */
> +       struct perf_mem_event *mem_events;
>  };
>
>  /** @perf_pmu__fake: A special global PMU used for testing. */
> --
> 2.35.1
>
  

Hi Kan,

> +void perf_pmu__arch_init(struct perf_pmu *pmu)
> +{
> +	if (strcmp(pmu->name, "arm_spe_0"))

if (!strcmp(...))

> +	if (x86__is_amd_cpu()) {
> +		if (strcmp(pmu->name, "ibs_op"))

Ditto.

Thanks,
Ravi
  

On 2023-12-07 9:21 a.m., Ravi Bangoria wrote:
> Hi Kan,
> 
>> +void perf_pmu__arch_init(struct perf_pmu *pmu)
>> +{
>> +	if (strcmp(pmu->name, "arm_spe_0"))
> 
> if (!strcmp(...))
> 
>> +	if (x86__is_amd_cpu()) {
>> +		if (strcmp(pmu->name, "ibs_op"))
> 
> Ditto.
> 

Thanks Ravi. I will fix it in V2.

Thanks,
Kan