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perf.12455
perf-vendor-events-Add-support-for-arch-standar...
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File perf-vendor-events-Add-support-for-arch-standard-eve.patch of Package perf.12455
From a3f2516903230dcd8405ddd5483c7faea45178f5 Mon Sep 17 00:00:00 2001 From: John Garry <john.garry@huawei.com> Date: Thu, 8 Mar 2018 18:58:32 +0800 Subject: [PATCH 100/105] perf vendor events: Add support for arch standard events Git-commit: e9d32c1bf0cd7a98358ec4aa1625bf2b3459b9ac Patch-mainline: v4.17-rc1 References: fate#326417 For some architectures (like arm), there are architecture- defined events. Sometimes these events may be "recommended" according to the architecture standard, in that the implementer is free ignore the "recommendation" and create its custom event. This patch adds support for parsing standard events from arch-defined JSONs, and fixing up vendor events when they have implemented these events as standard. Support is also ensured that the vendor may implement their own custom events. A new step is added to the pmu events parsing to fix up the vendor events with the arch-standard events. The arch-defined JSONs must be placed in the arch root folder for preprocessing prior to tree JSON processing. In the vendor JSON, to specify that the arch event is supported, the keyword "ArchStdEvent" should be used, like this: [ { "ArchStdEvent": "L1D_CACHE_WR", }, ] Matching is based on the "EventName" field in the architecture JSON. No other JSON objects are strictly required. However, for other objects added, these take precedence over architecture defined standard events, thus supporting separate events which have the same event code. Signed-off-by: John Garry <john.garry@huawei.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Shaokun Zhang <zhangshaokun@hisilicon.com> Cc: Will Deacon <will.deacon@arm.com> Cc: William Cohen <wcohen@redhat.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linuxarm@huawei.com Link: http://lkml.kernel.org/r/1520506716-197429-8-git-send-email-john.garry@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com> --- tools/perf/pmu-events/Build | 2 + tools/perf/pmu-events/README | 6 ++ tools/perf/pmu-events/jevents.c | 167 +++++++++++++++++++++++++++++++++++++++- 3 files changed, 172 insertions(+), 3 deletions(-) diff --git a/tools/perf/pmu-events/Build b/tools/perf/pmu-events/Build index 999a4e878162..17783913d330 100644 --- a/tools/perf/pmu-events/Build +++ b/tools/perf/pmu-events/Build @@ -1,10 +1,12 @@ hostprogs := jevents jevents-y += json.o jsmn.o jevents.o +CHOSTFLAGS_jevents.o = -I$(srctree)/tools/include pmu-events-y += pmu-events.o JDIR = pmu-events/arch/$(SRCARCH) JSON = $(shell [ -d $(JDIR) ] && \ find $(JDIR) -name '*.json' -o -name 'mapfile.csv') + # # Locate/process JSON files in pmu-events/arch/ # directory and create tables in pmu-events.c. diff --git a/tools/perf/pmu-events/README b/tools/perf/pmu-events/README index 655286ff8767..e62b09b6a844 100644 --- a/tools/perf/pmu-events/README +++ b/tools/perf/pmu-events/README @@ -16,6 +16,12 @@ tree tools/perf/pmu-events/arch/foo. - Directories are traversed, but all other files are ignored. + - To reduce JSON event duplication per architecture, platform JSONs may + use "ArchStdEvent" keyword to dereference an "Architecture standard + events", defined in architecture standard JSONs. + Architecture standard JSONs must be located in the architecture root + folder. Matching is based on the "EventName" field. + The PMU events supported by a CPU model are expected to grouped into topics such as Pipelining, Cache, Memory, Floating-point etc. All events for a topic should be placed in a separate JSON file - where the file name identifies diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c index 0b4918ab3998..f74db4f666dd 100644 --- a/tools/perf/pmu-events/jevents.c +++ b/tools/perf/pmu-events/jevents.c @@ -45,6 +45,7 @@ #include <sys/resource.h> /* getrlimit */ #include <ftw.h> #include <sys/stat.h> +#include <linux/list.h> #include "jsmn.h" #include "json.h" #include "jevents.h" @@ -316,6 +317,81 @@ static int print_events_table_entry(void *data, char *name, char *event, return 0; } +struct event_struct { + struct list_head list; + char *name; + char *event; + char *desc; + char *long_desc; + char *pmu; + char *unit; + char *perpkg; + char *metric_expr; + char *metric_name; + char *metric_group; +}; + +#define ADD_EVENT_FIELD(field) do { if (field) { \ + es->field = strdup(field); \ + if (!es->field) \ + goto out_free; \ +} } while (0) + +#define FREE_EVENT_FIELD(field) free(es->field) + +#define TRY_FIXUP_FIELD(field) do { if (es->field && !*field) {\ + *field = strdup(es->field); \ + if (!*field) \ + return -ENOMEM; \ +} } while (0) + +#define FOR_ALL_EVENT_STRUCT_FIELDS(op) do { \ + op(name); \ + op(event); \ + op(desc); \ + op(long_desc); \ + op(pmu); \ + op(unit); \ + op(perpkg); \ + op(metric_expr); \ + op(metric_name); \ + op(metric_group); \ +} while (0) + +static LIST_HEAD(arch_std_events); + +static void free_arch_std_events(void) +{ + struct event_struct *es, *next; + + list_for_each_entry_safe(es, next, &arch_std_events, list) { + FOR_ALL_EVENT_STRUCT_FIELDS(FREE_EVENT_FIELD); + list_del(&es->list); + free(es); + } +} + +static int save_arch_std_events(void *data, char *name, char *event, + char *desc, char *long_desc, char *pmu, + char *unit, char *perpkg, char *metric_expr, + char *metric_name, char *metric_group) +{ + struct event_struct *es; + struct stat *sb = data; + + es = malloc(sizeof(*es)); + if (!es) + return -ENOMEM; + memset(es, 0, sizeof(*es)); + FOR_ALL_EVENT_STRUCT_FIELDS(ADD_EVENT_FIELD); + list_add_tail(&es->list, &arch_std_events); + return 0; +out_free: + FOR_ALL_EVENT_STRUCT_FIELDS(FREE_EVENT_FIELD); + free(es); + return -ENOMEM; +} + static void print_events_table_suffix(FILE *outfp) { fprintf(outfp, "{\n"); @@ -357,6 +433,32 @@ static char *real_event(const char *name, char *event) return event; } +static int +try_fixup(const char *fn, char *arch_std, char **event, char **desc, + char **name, char **long_desc, char **pmu, char **filter, + char **perpkg, char **unit, char **metric_expr, char **metric_name, + char **metric_group, unsigned long long eventcode) +{ + /* try to find matching event from arch standard values */ + struct event_struct *es; + + list_for_each_entry(es, &arch_std_events, list) { + if (!strcmp(arch_std, es->name)) { + if (!eventcode && es->event) { + /* allow EventCode to be overridden */ + free(*event); + *event = NULL; + } + FOR_ALL_EVENT_STRUCT_FIELDS(TRY_FIXUP_FIELD); + return 0; + } + } + + pr_err("%s: could not find matching %s for %s\n", + prog, arch_std, fn); + return -1; +} + /* Call func with each event in the json file */ int json_events(const char *fn, int (*func)(void *data, char *name, char *event, char *desc, @@ -392,6 +494,7 @@ int json_events(const char *fn, char *metric_expr = NULL; char *metric_name = NULL; char *metric_group = NULL; + char *arch_std = NULL; unsigned long long eventcode = 0; struct msrmap *msr = NULL; jsmntok_t *msrval = NULL; @@ -477,6 +580,10 @@ int json_events(const char *fn, addfield(map, &metric_expr, "", "", val); for (s = metric_expr; *s; s++) *s = tolower(*s); + } else if (json_streq(map, field, "ArchStdEvent")) { + addfield(map, &arch_std, "", "", val); + for (s = arch_std; *s; s++) + *s = tolower(*s); } /* ignore unknown fields */ } @@ -501,8 +608,21 @@ int json_events(const char *fn, if (name) fixname(name); + if (arch_std) { + /* + * An arch standard event is referenced, so try to + * fixup any unassigned values. + */ + err = try_fixup(fn, arch_std, &event, &desc, &name, + &long_desc, &pmu, &filter, &perpkg, + &unit, &metric_expr, &metric_name, + &metric_group, eventcode); + if (err) + goto free_strings; + } err = func(data, name, real_event(name, event), desc, long_desc, pmu, unit, perpkg, metric_expr, metric_name, metric_group); +free_strings: free(event); free(desc); free(name); @@ -515,6 +635,8 @@ int json_events(const char *fn, free(metric_expr); free(metric_name); free(metric_group); + free(arch_std); + if (err) break; tok += j; @@ -742,6 +864,32 @@ static int is_leaf_dir(const char *fpath) return res; } +static int is_json_file(const char *name) +{ + const char *suffix; + + if (strlen(name) < 5) + return 0; + + suffix = name + strlen(name) - 5; + + if (strncmp(suffix, ".json", 5) == 0) + return 1; + return 0; +} + +static int preprocess_arch_std_files(const char *fpath, const struct stat *sb, + int typeflag, struct FTW *ftwbuf) +{ + int level = ftwbuf->level; + int is_file = typeflag == FTW_F; + + if (level == 1 && is_file && is_json_file(fpath)) + return json_events(fpath, save_arch_std_events, (void *)sb); + + return 0; +} + static int process_one_file(const char *fpath, const struct stat *sb, int typeflag, struct FTW *ftwbuf) { @@ -819,9 +967,7 @@ static int process_one_file(const char *fpath, const struct stat *sb, * ignore it. It could be a readme.txt for instance. */ if (is_file) { - char *suffix = bname + strlen(bname) - 5; - - if (strncmp(suffix, ".json", 5)) { + if (!is_json_file(bname)) { pr_info("%s: Ignoring file without .json suffix %s\n", prog, fpath); return 0; @@ -927,12 +1073,26 @@ int main(int argc, char *argv[]) maxfds = get_maxfds(); mapfile = NULL; + rc = nftw(ldirname, preprocess_arch_std_files, maxfds, 0); + if (rc && verbose) { + pr_info("%s: Error preprocessing arch standard files %s\n", + prog, ldirname); + goto empty_map; + } else if (rc < 0) { + /* Make build fail */ + free_arch_std_events(); + return 1; + } else if (rc) { + goto empty_map; + } + rc = nftw(ldirname, process_one_file, maxfds, 0); if (rc && verbose) { pr_info("%s: Error walking file tree %s\n", prog, ldirname); goto empty_map; } else if (rc < 0) { /* Make build fail */ + free_arch_std_events(); return 1; } else if (rc) { goto empty_map; @@ -957,5 +1117,6 @@ int main(int argc, char *argv[]) empty_map: fclose(eventsfp); create_empty_mapping(output_file); + free_arch_std_events(); return 0; } -- 2.11.0
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