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Rao" , Ian Rogers , Kemeng Shi , James Clark , Wei Li , Adrian Hunter , Al Grant , linux-kernel@vger.kernel.org Cc: Leo Yan Subject: [PATCH v1 02/11] perf mem: Introduce weak function perf_mem_events__ptr() Date: Thu, 6 Aug 2020 10:40:32 +0800 Message-Id: <20200806024041.27475-3-leo.yan@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200806024041.27475-1-leo.yan@linaro.org> References: <20200806024041.27475-1-leo.yan@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Different architectures might use different event or different event parameters for memory profiling, this patch introduces weak function perf_mem_events__ptr(), which allows to return back architecture specific memory event. After the function perf_mem_events__ptr() is introduced, the variable 'perf_mem_events' can be accessed by using this new function; so marks the variable as 'static' variable, this can allow the architectures to define its own memory event array. Signed-off-by: Leo Yan --- tools/perf/builtin-c2c.c | 18 ++++++++++++------ tools/perf/builtin-mem.c | 21 ++++++++++++++------- tools/perf/util/mem-events.c | 26 +++++++++++++++++++------- tools/perf/util/mem-events.h | 2 +- 4 files changed, 46 insertions(+), 21 deletions(-) diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c index 5938b100eaf4..88e68f36aa62 100644 --- a/tools/perf/builtin-c2c.c +++ b/tools/perf/builtin-c2c.c @@ -2914,6 +2914,7 @@ static int perf_c2c__record(int argc, const char **argv) int ret; bool all_user = false, all_kernel = false; bool event_set = false; + struct perf_mem_event *e; struct option options[] = { OPT_CALLBACK('e', "event", &event_set, "event", "event selector. Use 'perf mem record -e list' to list available events", @@ -2941,11 +2942,15 @@ static int perf_c2c__record(int argc, const char **argv) rec_argv[i++] = "record"; if (!event_set) { - perf_mem_events[PERF_MEM_EVENTS__LOAD].record = true; - perf_mem_events[PERF_MEM_EVENTS__STORE].record = true; + e = perf_mem_events__ptr(PERF_MEM_EVENTS__LOAD); + e->record = true; + + e = perf_mem_events__ptr(PERF_MEM_EVENTS__STORE); + e->record = true; } - if (perf_mem_events[PERF_MEM_EVENTS__LOAD].record) + e = perf_mem_events__ptr(PERF_MEM_EVENTS__LOAD); + if (e->record) rec_argv[i++] = "-W"; rec_argv[i++] = "-d"; @@ -2953,12 +2958,13 @@ static int perf_c2c__record(int argc, const char **argv) rec_argv[i++] = "--sample-cpu"; for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) { - if (!perf_mem_events[j].record) + e = perf_mem_events__ptr(j); + if (!e->record) continue; - if (!perf_mem_events[j].supported) { + if (!e->supported) { pr_err("failed: event '%s' not supported\n", - perf_mem_events[j].name); + perf_mem_events__name(j)); free(rec_argv); return -1; } diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c index 3523279af6af..9a7df8d01296 100644 --- a/tools/perf/builtin-mem.c +++ b/tools/perf/builtin-mem.c @@ -64,6 +64,7 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem) const char **rec_argv; int ret; bool all_user = false, all_kernel = false; + struct perf_mem_event *e; struct option options[] = { OPT_CALLBACK('e', "event", &mem, "event", "event selector. use 'perf mem record -e list' to list available events", @@ -86,13 +87,18 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem) rec_argv[i++] = "record"; - if (mem->operation & MEM_OPERATION_LOAD) - perf_mem_events[PERF_MEM_EVENTS__LOAD].record = true; + if (mem->operation & MEM_OPERATION_LOAD) { + e = perf_mem_events__ptr(PERF_MEM_EVENTS__LOAD); + e->record = true; + } - if (mem->operation & MEM_OPERATION_STORE) - perf_mem_events[PERF_MEM_EVENTS__STORE].record = true; + if (mem->operation & MEM_OPERATION_STORE) { + e = perf_mem_events__ptr(PERF_MEM_EVENTS__STORE); + e->record = true; + } - if (perf_mem_events[PERF_MEM_EVENTS__LOAD].record) + e = perf_mem_events__ptr(PERF_MEM_EVENTS__LOAD); + if (e->record) rec_argv[i++] = "-W"; rec_argv[i++] = "-d"; @@ -101,10 +107,11 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem) rec_argv[i++] = "--phys-data"; for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) { - if (!perf_mem_events[j].record) + e = perf_mem_events__ptr(j); + if (!e->record) continue; - if (!perf_mem_events[j].supported) { + if (!e->supported) { pr_err("failed: event '%s' not supported\n", perf_mem_events__name(j)); free(rec_argv); diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c index 35c8d175a9d2..7a5a0d699e27 100644 --- a/tools/perf/util/mem-events.c +++ b/tools/perf/util/mem-events.c @@ -17,7 +17,7 @@ unsigned int perf_mem_events__loads_ldlat = 30; #define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s } -struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = { +static 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"), }; @@ -28,19 +28,31 @@ struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = { static char mem_loads_name[100]; static bool mem_loads_name__init; +struct perf_mem_event * __weak perf_mem_events__ptr(int i) +{ + if (i >= PERF_MEM_EVENTS__MAX) + return NULL; + + return &perf_mem_events[i]; +} + char * __weak perf_mem_events__name(int i) { + struct perf_mem_event *e = perf_mem_events__ptr(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), - perf_mem_events[i].name, - perf_mem_events__loads_ldlat); + e->name, perf_mem_events__loads_ldlat); } return mem_loads_name; } - return (char *)perf_mem_events[i].name; + return (char *)e->name; } int perf_mem_events__parse(const char *str) @@ -61,7 +73,7 @@ int perf_mem_events__parse(const char *str) while (tok) { for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) { - struct perf_mem_event *e = &perf_mem_events[j]; + struct perf_mem_event *e = perf_mem_events__ptr(j); if (strstr(e->tag, tok)) e->record = found = true; @@ -90,7 +102,7 @@ int perf_mem_events__init(void) for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) { char path[PATH_MAX]; - struct perf_mem_event *e = &perf_mem_events[j]; + struct perf_mem_event *e = perf_mem_events__ptr(j); struct stat st; scnprintf(path, PATH_MAX, "%s/devices/%s", @@ -108,7 +120,7 @@ void perf_mem_events__list(void) int j; for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) { - struct perf_mem_event *e = &perf_mem_events[j]; + struct perf_mem_event *e = perf_mem_events__ptr(j); fprintf(stderr, "%-13s%-*s%s\n", e->tag, diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h index 904dad34f7f7..726a9c8103e4 100644 --- a/tools/perf/util/mem-events.h +++ b/tools/perf/util/mem-events.h @@ -31,13 +31,13 @@ enum { PERF_MEM_EVENTS__MAX, }; -extern struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX]; extern unsigned int perf_mem_events__loads_ldlat; int perf_mem_events__parse(const char *str); int perf_mem_events__init(void); char *perf_mem_events__name(int i); +struct perf_mem_event *perf_mem_events__ptr(int i); void perf_mem_events__list(void); -- 2.17.1