diff options
Diffstat (limited to 'tools/perf/util/pmus.c')
| -rw-r--r-- | tools/perf/util/pmus.c | 202 |
1 files changed, 112 insertions, 90 deletions
diff --git a/tools/perf/util/pmus.c b/tools/perf/util/pmus.c index b493da0d22ef..b99292de7669 100644 --- a/tools/perf/util/pmus.c +++ b/tools/perf/util/pmus.c @@ -3,10 +3,10 @@ #include <linux/list_sort.h> #include <linux/string.h> #include <linux/zalloc.h> +#include <api/io_dir.h> #include <subcmd/pager.h> #include <sys/types.h> #include <ctype.h> -#include <dirent.h> #include <pthread.h> #include <string.h> #include <unistd.h> @@ -37,10 +37,25 @@ */ static LIST_HEAD(core_pmus); static LIST_HEAD(other_pmus); -static bool read_sysfs_core_pmus; -static bool read_sysfs_all_pmus; +enum perf_tool_pmu_type { + PERF_TOOL_PMU_TYPE_PE_CORE, + PERF_TOOL_PMU_TYPE_PE_OTHER, + PERF_TOOL_PMU_TYPE_TOOL, + PERF_TOOL_PMU_TYPE_HWMON, + +#define PERF_TOOL_PMU_TYPE_PE_CORE_MASK (1 << PERF_TOOL_PMU_TYPE_PE_CORE) +#define PERF_TOOL_PMU_TYPE_PE_OTHER_MASK (1 << PERF_TOOL_PMU_TYPE_PE_OTHER) +#define PERF_TOOL_PMU_TYPE_TOOL_MASK (1 << PERF_TOOL_PMU_TYPE_TOOL) +#define PERF_TOOL_PMU_TYPE_HWMON_MASK (1 << PERF_TOOL_PMU_TYPE_HWMON) + +#define PERF_TOOL_PMU_TYPE_ALL_MASK (PERF_TOOL_PMU_TYPE_PE_CORE_MASK | \ + PERF_TOOL_PMU_TYPE_PE_OTHER_MASK | \ + PERF_TOOL_PMU_TYPE_TOOL_MASK | \ + PERF_TOOL_PMU_TYPE_HWMON_MASK) +}; +static unsigned int read_pmu_types; -static void pmu_read_sysfs(bool core_only); +static void pmu_read_sysfs(unsigned int to_read_pmus); size_t pmu_name_len_no_suffix(const char *str) { @@ -102,8 +117,7 @@ void perf_pmus__destroy(void) perf_pmu__delete(pmu); } - read_sysfs_core_pmus = false; - read_sysfs_all_pmus = false; + read_pmu_types = 0; } static struct perf_pmu *pmu_find(const char *name) @@ -129,6 +143,7 @@ struct perf_pmu *perf_pmus__find(const char *name) struct perf_pmu *pmu; int dirfd; bool core_pmu; + unsigned int to_read_pmus = 0; /* * Once PMU is loaded it stays in the list, @@ -139,11 +154,11 @@ struct perf_pmu *perf_pmus__find(const char *name) if (pmu) return pmu; - if (read_sysfs_all_pmus) + if (read_pmu_types == PERF_TOOL_PMU_TYPE_ALL_MASK) return NULL; core_pmu = is_pmu_core(name); - if (core_pmu && read_sysfs_core_pmus) + if (core_pmu && (read_pmu_types & PERF_TOOL_PMU_TYPE_PE_CORE_MASK)) return NULL; dirfd = perf_pmu__event_source_devices_fd(); @@ -151,15 +166,27 @@ struct perf_pmu *perf_pmus__find(const char *name) /*eager_load=*/false); close(dirfd); - if (!pmu) { - /* - * Looking up an inidividual PMU failed. This may mean name is - * an alias, so read the PMUs from sysfs and try to find again. - */ - pmu_read_sysfs(core_pmu); + if (pmu) + return pmu; + + /* Looking up an individual perf event PMU failed, check if a tool PMU should be read. */ + if (!strncmp(name, "hwmon_", 6)) + to_read_pmus |= PERF_TOOL_PMU_TYPE_HWMON_MASK; + else if (!strcmp(name, "tool")) + to_read_pmus |= PERF_TOOL_PMU_TYPE_TOOL_MASK; + + if (to_read_pmus) { + pmu_read_sysfs(to_read_pmus); pmu = pmu_find(name); + if (pmu) + return pmu; } - return pmu; + /* Read all necessary PMUs from sysfs and see if the PMU is found. */ + to_read_pmus = PERF_TOOL_PMU_TYPE_PE_CORE_MASK; + if (!core_pmu) + to_read_pmus |= PERF_TOOL_PMU_TYPE_PE_OTHER_MASK; + pmu_read_sysfs(to_read_pmus); + return pmu_find(name); } static struct perf_pmu *perf_pmu__find2(int dirfd, const char *name) @@ -176,11 +203,11 @@ static struct perf_pmu *perf_pmu__find2(int dirfd, const char *name) if (pmu) return pmu; - if (read_sysfs_all_pmus) + if (read_pmu_types == PERF_TOOL_PMU_TYPE_ALL_MASK) return NULL; core_pmu = is_pmu_core(name); - if (core_pmu && read_sysfs_core_pmus) + if (core_pmu && (read_pmu_types & PERF_TOOL_PMU_TYPE_PE_CORE_MASK)) return NULL; return perf_pmu__lookup(core_pmu ? &core_pmus : &other_pmus, dirfd, name, @@ -197,52 +224,57 @@ static int pmus_cmp(void *priv __maybe_unused, } /* Add all pmus in sysfs to pmu list: */ -static void pmu_read_sysfs(bool core_only) +static void pmu_read_sysfs(unsigned int to_read_types) { - int fd; - DIR *dir; - struct dirent *dent; struct perf_pmu *tool_pmu; - if (read_sysfs_all_pmus || (core_only && read_sysfs_core_pmus)) + if ((read_pmu_types & to_read_types) == to_read_types) { + /* All requested PMU types have been read. */ return; + } - fd = perf_pmu__event_source_devices_fd(); - if (fd < 0) - return; + if (to_read_types & (PERF_TOOL_PMU_TYPE_PE_CORE_MASK | PERF_TOOL_PMU_TYPE_PE_OTHER_MASK)) { + int fd = perf_pmu__event_source_devices_fd(); + struct io_dir dir; + struct io_dirent64 *dent; + bool core_only = (to_read_types & PERF_TOOL_PMU_TYPE_PE_OTHER_MASK) == 0; - dir = fdopendir(fd); - if (!dir) { - close(fd); - return; - } + if (fd < 0) + goto skip_pe_pmus; - while ((dent = readdir(dir))) { - if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, "..")) - continue; - if (core_only && !is_pmu_core(dent->d_name)) - continue; - /* add to static LIST_HEAD(core_pmus) or LIST_HEAD(other_pmus): */ - perf_pmu__find2(fd, dent->d_name); - } + io_dir__init(&dir, fd); + + while ((dent = io_dir__readdir(&dir)) != NULL) { + if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, "..")) + continue; + if (core_only && !is_pmu_core(dent->d_name)) + continue; + /* add to static LIST_HEAD(core_pmus) or LIST_HEAD(other_pmus): */ + perf_pmu__find2(fd, dent->d_name); + } - closedir(dir); - if (list_empty(&core_pmus)) { + close(fd); + } +skip_pe_pmus: + if ((to_read_types & PERF_TOOL_PMU_TYPE_PE_CORE_MASK) && list_empty(&core_pmus)) { if (!perf_pmu__create_placeholder_core_pmu(&core_pmus)) pr_err("Failure to set up any core PMUs\n"); } list_sort(NULL, &core_pmus, pmus_cmp); - if (!core_only) { - tool_pmu = perf_pmus__tool_pmu(); - list_add_tail(&tool_pmu->list, &other_pmus); - perf_pmus__read_hwmon_pmus(&other_pmus); + + if ((to_read_types & PERF_TOOL_PMU_TYPE_TOOL_MASK) != 0 && + (read_pmu_types & PERF_TOOL_PMU_TYPE_TOOL_MASK) == 0) { + tool_pmu = tool_pmu__new(); + if (tool_pmu) + list_add_tail(&tool_pmu->list, &other_pmus); } + if ((to_read_types & PERF_TOOL_PMU_TYPE_HWMON_MASK) != 0 && + (read_pmu_types & PERF_TOOL_PMU_TYPE_HWMON_MASK) == 0) + perf_pmus__read_hwmon_pmus(&other_pmus); + list_sort(NULL, &other_pmus, pmus_cmp); - if (!list_empty(&core_pmus)) { - read_sysfs_core_pmus = true; - if (!core_only) - read_sysfs_all_pmus = true; - } + + read_pmu_types |= to_read_types; } static struct perf_pmu *__perf_pmus__find_by_type(unsigned int type) @@ -263,12 +295,21 @@ static struct perf_pmu *__perf_pmus__find_by_type(unsigned int type) struct perf_pmu *perf_pmus__find_by_type(unsigned int type) { + unsigned int to_read_pmus; struct perf_pmu *pmu = __perf_pmus__find_by_type(type); - if (pmu || read_sysfs_all_pmus) + if (pmu || (read_pmu_types == PERF_TOOL_PMU_TYPE_ALL_MASK)) return pmu; - pmu_read_sysfs(/*core_only=*/false); + if (type >= PERF_PMU_TYPE_PE_START && type <= PERF_PMU_TYPE_PE_END) { + to_read_pmus = PERF_TOOL_PMU_TYPE_PE_CORE_MASK | + PERF_TOOL_PMU_TYPE_PE_OTHER_MASK; + } else if (type >= PERF_PMU_TYPE_HWMON_START && type <= PERF_PMU_TYPE_HWMON_END) { + to_read_pmus = PERF_TOOL_PMU_TYPE_HWMON_MASK; + } else { + to_read_pmus = PERF_TOOL_PMU_TYPE_TOOL_MASK; + } + pmu_read_sysfs(to_read_pmus); pmu = __perf_pmus__find_by_type(type); return pmu; } @@ -282,7 +323,7 @@ struct perf_pmu *perf_pmus__scan(struct perf_pmu *pmu) bool use_core_pmus = !pmu || pmu->is_core; if (!pmu) { - pmu_read_sysfs(/*core_only=*/false); + pmu_read_sysfs(PERF_TOOL_PMU_TYPE_ALL_MASK); pmu = list_prepare_entry(pmu, &core_pmus, list); } if (use_core_pmus) { @@ -300,7 +341,7 @@ struct perf_pmu *perf_pmus__scan(struct perf_pmu *pmu) struct perf_pmu *perf_pmus__scan_core(struct perf_pmu *pmu) { if (!pmu) { - pmu_read_sysfs(/*core_only=*/true); + pmu_read_sysfs(PERF_TOOL_PMU_TYPE_PE_CORE_MASK); return list_first_entry_or_null(&core_pmus, typeof(*pmu), list); } list_for_each_entry_continue(pmu, &core_pmus, list) @@ -316,7 +357,7 @@ static struct perf_pmu *perf_pmus__scan_skip_duplicates(struct perf_pmu *pmu) const char *last_pmu_name = (pmu && pmu->name) ? pmu->name : ""; if (!pmu) { - pmu_read_sysfs(/*core_only=*/false); + pmu_read_sysfs(PERF_TOOL_PMU_TYPE_ALL_MASK); pmu = list_prepare_entry(pmu, &core_pmus, list); } else last_pmu_name_len = pmu_name_len_no_suffix(pmu->name ?: ""); @@ -674,47 +715,28 @@ bool perf_pmus__supports_extended_type(void) return perf_pmus__do_support_extended_type; } -char *perf_pmus__default_pmu_name(void) -{ - int fd; - DIR *dir; - struct dirent *dent; - char *result = NULL; - - if (!list_empty(&core_pmus)) - return strdup(list_first_entry(&core_pmus, struct perf_pmu, list)->name); - - fd = perf_pmu__event_source_devices_fd(); - if (fd < 0) - return strdup("cpu"); - - dir = fdopendir(fd); - if (!dir) { - close(fd); - return strdup("cpu"); - } - - while ((dent = readdir(dir))) { - if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, "..")) - continue; - if (is_pmu_core(dent->d_name)) { - result = strdup(dent->d_name); - break; - } - } - - closedir(dir); - return result ?: strdup("cpu"); -} - struct perf_pmu *evsel__find_pmu(const struct evsel *evsel) { struct perf_pmu *pmu = evsel->pmu; + bool legacy_core_type; - if (!pmu) { - pmu = perf_pmus__find_by_type(evsel->core.attr.type); - ((struct evsel *)evsel)->pmu = pmu; + if (pmu) + return pmu; + + pmu = perf_pmus__find_by_type(evsel->core.attr.type); + legacy_core_type = + evsel->core.attr.type == PERF_TYPE_HARDWARE || + evsel->core.attr.type == PERF_TYPE_HW_CACHE; + if (!pmu && legacy_core_type) { + if (perf_pmus__supports_extended_type()) { + u32 type = evsel->core.attr.config >> PERF_PMU_TYPE_SHIFT; + + pmu = perf_pmus__find_by_type(type); + } else { + pmu = perf_pmus__find_core_pmu(); + } } + ((struct evsel *)evsel)->pmu = pmu; return pmu; } |