DRM clients expose information through usage stats as documented in Documentation/gpu/drm-usage-stats.rst (available online at https://docs.kernel.org/gpu/drm-usage-stats.html). Add a tool like PMU, similar to the hwmon PMU, that exposes DRM information. For example on a tigerlake laptop: ``` $ perf list drm List of pre-defined events (to be used in -e or -M): drm: drm-active-stolen-system0 [Total memory active in one or more engines. Unit: drm_i915] drm-active-system0 [Total memory active in one or more engines. Unit: drm_i915] drm-engine-capacity-video [Engine capacity. Unit: drm_i915] drm-engine-copy [Utilization in ns. Unit: drm_i915] drm-engine-render [Utilization in ns. Unit: drm_i915] drm-engine-video [Utilization in ns. Unit: drm_i915] drm-engine-video-enhance [Utilization in ns. Unit: drm_i915] drm-purgeable-stolen-system0 [Size of resident and purgeable memory bufers. Unit: drm_i915] drm-purgeable-system0 [Size of resident and purgeable memory bufers. Unit: drm_i915] drm-resident-stolen-system0 [Size of resident memory bufers. Unit: drm_i915] drm-resident-system0 [Size of resident memory bufers. Unit: drm_i915] drm-shared-stolen-system0 [Size of shared memory bufers. Unit: drm_i915] drm-shared-system0 [Size of shared memory bufers. Unit: drm_i915] drm-total-stolen-system0 [Size of shared and private memory. Unit: drm_i915] drm-total-system0 [Size of shared and private memory. Unit: drm_i915] ``` System wide data can be gathered: ``` $ perf stat -x, -I 1000 -e drm-active-stolen-system0,drm-active-system0,drm-engine-capacity-video,drm-engine-copy,drm-engine-render,drm-engine-video,drm-engine-video-enhance,drm-purgeable-stolen-system0,drm-purgeable-system0,drm-resident-stolen-system0,drm-resident-system0,drm-shared-stolen-system0,drm-shared-system0,drm-total-stolen-system0,drm-total-system0 1.000904910,0,bytes,drm-active-stolen-system0,1,100.00,, 1.000904910,0,bytes,drm-active-system0,1,100.00,, 1.000904910,36,capacity,drm-engine-capacity-video,1,100.00,, 1.000904910,0,ns,drm-engine-copy,1,100.00,, 1.000904910,1472970566175,ns,drm-engine-render,1,100.00,, 1.000904910,0,ns,drm-engine-video,1,100.00,, 1.000904910,0,ns,drm-engine-video-enhance,1,100.00,, 1.000904910,0,bytes,drm-purgeable-stolen-system0,1,100.00,, 1.000904910,38199296,bytes,drm-purgeable-system0,1,100.00,, 1.000904910,0,bytes,drm-resident-stolen-system0,1,100.00,, 1.000904910,4643196928,bytes,drm-resident-system0,1,100.00,, 1.000904910,0,bytes,drm-shared-stolen-system0,1,100.00,, 1.000904910,1886871552,bytes,drm-shared-system0,1,100.00,, 1.000904910,0,bytes,drm-total-stolen-system0,1,100.00,, 1.000904910,4643196928,bytes,drm-total-system0,1,100.00,, 2.264426839,0,bytes,drm-active-stolen-system0,1,100.00,, ``` Or for a particular process: ``` $ perf stat -x, -I 1000 -e drm-active-stolen-system0,drm-active-system0,drm-engine-capacity-video,drm-engine-copy,drm-engine-render,drm-engine-video,drm-engine-video-enhance,drm-purgeable-stolen-system0,drm-purgeable-system0,drm-resident-stolen-system0,drm-resident-system0,drm-shared-stolen-system0,drm-shared-system0,drm-total-stolen-system0,drm-total-system0 -p 200027 1.001040274,0,bytes,drm-active-stolen-system0,6,100.00,, 1.001040274,0,bytes,drm-active-system0,6,100.00,, 1.001040274,12,capacity,drm-engine-capacity-video,6,100.00,, 1.001040274,0,ns,drm-engine-copy,6,100.00,, 1.001040274,1542300,ns,drm-engine-render,6,100.00,, 1.001040274,0,ns,drm-engine-video,6,100.00,, 1.001040274,0,ns,drm-engine-video-enhance,6,100.00,, 1.001040274,0,bytes,drm-purgeable-stolen-system0,6,100.00,, 1.001040274,13516800,bytes,drm-purgeable-system0,6,100.00,, 1.001040274,0,bytes,drm-resident-stolen-system0,6,100.00,, 1.001040274,27746304,bytes,drm-resident-system0,6,100.00,, 1.001040274,0,bytes,drm-shared-stolen-system0,6,100.00,, 1.001040274,0,bytes,drm-shared-system0,6,100.00,, 1.001040274,0,bytes,drm-total-stolen-system0,6,100.00,, 1.001040274,27746304,bytes,drm-total-system0,6,100.00,, 2.016629075,0,bytes,drm-active-stolen-system0,6,100.00,, ``` As with the hwmon PMU, high numbered PMU types are used to encode multiple possible "DRM" PMUs. The appropriate fdinfo is found by scanning /proc and filtering which fdinfos to read with stat. To avoid some unneeding scanning, events not starting with "drm-" are ignored. The patch builds on commit 57e13264dcea ("perf pmus: Restructure pmu_read_sysfs to scan fewer PMUs") so that only if full wild carding is being done, that the drm PMUs will be read. Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx> --- tools/perf/util/Build | 1 + tools/perf/util/drm_pmu.c | 688 ++++++++++++++++++++++++++++++++++++++ tools/perf/util/drm_pmu.h | 33 ++ tools/perf/util/evsel.c | 9 + tools/perf/util/pmu.c | 15 + tools/perf/util/pmu.h | 4 +- tools/perf/util/pmus.c | 14 +- 7 files changed, 762 insertions(+), 2 deletions(-) create mode 100644 tools/perf/util/drm_pmu.c create mode 100644 tools/perf/util/drm_pmu.h diff --git a/tools/perf/util/Build b/tools/perf/util/Build index 5ec97e8d6b6d..3f609a4545ca 100644 --- a/tools/perf/util/Build +++ b/tools/perf/util/Build @@ -83,6 +83,7 @@ perf-util-y += pmu.o perf-util-y += pmus.o perf-util-y += pmu-flex.o perf-util-y += pmu-bison.o +perf-util-y += drm_pmu.o perf-util-y += hwmon_pmu.o perf-util-y += tool_pmu.o perf-util-y += svghelper.o diff --git a/tools/perf/util/drm_pmu.c b/tools/perf/util/drm_pmu.c new file mode 100644 index 000000000000..14ac4d26b15c --- /dev/null +++ b/tools/perf/util/drm_pmu.c @@ -0,0 +1,688 @@ +// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) +#include "drm_pmu.h" +#include "counts.h" +#include "cpumap.h" +#include "debug.h" +#include "evsel.h" +#include "pmu.h" +#include <perf/threadmap.h> +#include <api/fs/fs.h> +#include <api/io.h> +#include <ctype.h> +#include <dirent.h> +#include <fcntl.h> +#include <unistd.h> +#include <linux/unistd.h> +#include <linux/kcmp.h> +#include <linux/zalloc.h> +#include <sys/stat.h> +#include <sys/syscall.h> +#include <sys/sysmacros.h> +#include <sys/types.h> + +enum drm_pmu_unit { + DRM_PMU_UNIT_BYTES, + DRM_PMU_UNIT_CAPACITY, + DRM_PMU_UNIT_CYCLES, + DRM_PMU_UNIT_HZ, + DRM_PMU_UNIT_NS, + + DRM_PMU_UNIT_MAX, +}; + +struct drm_pmu_event { + const char *name; + const char *desc; + enum drm_pmu_unit unit; +}; + +struct drm_pmu { + struct perf_pmu pmu; + struct drm_pmu_event *events; + int num_events; +}; + +static const char * const drm_pmu_unit_strs[DRM_PMU_UNIT_MAX] = { + "bytes", + "capacity", + "cycles", + "hz", + "ns", +}; + +static const char * const drm_pmu_scale_unit_strs[DRM_PMU_UNIT_MAX] = { + "1bytes", + "1capacity", + "1cycles", + "1hz", + "1ns", +}; + +bool perf_pmu__is_drm(const struct perf_pmu *pmu) +{ + return pmu && pmu->type >= PERF_PMU_TYPE_DRM_START && + pmu->type <= PERF_PMU_TYPE_DRM_END; +} + +bool evsel__is_drm(const struct evsel *evsel) +{ + return perf_pmu__is_drm(evsel->pmu); +} + +static struct drm_pmu *add_drm_pmu(struct list_head *pmus, char *line, size_t line_len) +{ + struct drm_pmu *drm; + struct perf_pmu *pmu; + const char *name; + __u32 max_drm_pmu_type = 0; + int i = 12; + + if (line[line_len - 1] == '\n') + line[line_len - 1] = '\0'; + while (isspace(line[i])) + i++; + + line[--i] = '_'; + line[--i] = 'm'; + line[--i] = 'r'; + line[--i] = 'd'; + name = &line[i]; + + list_for_each_entry(pmu, pmus, list) { + if (!perf_pmu__is_drm(pmu)) + continue; + if (pmu->type > max_drm_pmu_type) + max_drm_pmu_type = pmu->type; + if (!strcmp(pmu->name, name)) { + /* PMU already exists. */ + return NULL; + } + } + + drm = zalloc(sizeof(*drm)); + if (!drm) + return NULL; + + if (max_drm_pmu_type != 0) + drm->pmu.type = max_drm_pmu_type + 1; + else + drm->pmu.type = PERF_PMU_TYPE_DRM_START; + + if (drm->pmu.type > PERF_PMU_TYPE_DRM_END) { + zfree(&drm); + pr_err("Unable to encode DRM PMU type for %s\n", name); + return NULL; + } + drm->pmu.name = strdup(name); + if (!drm->pmu.name) { + zfree(&drm); + return NULL; + } + drm->pmu.cpus = perf_cpu_map__new("0"); + if (!drm->pmu.cpus) { + zfree(&drm->pmu.name); + zfree(&drm); + return NULL; + } + INIT_LIST_HEAD(&drm->pmu.format); + INIT_LIST_HEAD(&drm->pmu.aliases); + INIT_LIST_HEAD(&drm->pmu.caps); + return drm; +} + + +static bool starts_with(const char *str, const char *prefix) +{ + return !strncmp(prefix, str, strlen(prefix)); +} + +static int add_event(struct drm_pmu_event **events, int *num_events, + const char *line, enum drm_pmu_unit unit, const char *desc) +{ + const char *colon = strchr(line, ':'); + struct drm_pmu_event *tmp; + + if (!colon) + return -EINVAL; + + tmp = reallocarray(*events, *num_events + 1, sizeof(struct drm_pmu_event)); + if (!tmp) + return -ENOMEM; + tmp[*num_events].unit = unit; + tmp[*num_events].desc = desc; + tmp[*num_events].name = strndup(line, colon - line); + if (!tmp[*num_events].name) + return -ENOMEM; + (*num_events)++; + *events = tmp; + return 0; +} + +static int read_drm_pmus_cb(void *args, int fdinfo_dir_fd, const char *fd_name) +{ + struct list_head *pmus = args; + char buf[640]; + struct io io; + char *line = NULL; + size_t line_len; + struct drm_pmu *drm = NULL; + struct drm_pmu_event *events = NULL; + int num_events = 0; + + io__init(&io, openat(fdinfo_dir_fd, fd_name, O_RDONLY), buf, sizeof(buf)); + if (io.fd == -1) { + /* Failed to open file, ignore. */ + return 0; + } + + while (io__getline(&io, &line, &line_len) > 0) { + if (starts_with(line, "drm-driver:")) { + drm = add_drm_pmu(pmus, line, line_len); + if (!drm) + break; + continue; + } + /* + * Note the string matching below is alphabetical, with more + * specific matches appearing before less specific. + */ + if (starts_with(line, "drm-active-")) { + add_event(&events, &num_events, line, DRM_PMU_UNIT_BYTES, + "Total memory active in one or more engines"); + continue; + } + if (starts_with(line, "drm-cycles-")) { + add_event(&events, &num_events, line, DRM_PMU_UNIT_CYCLES, + "Busy cycles"); + continue; + } + if (starts_with(line, "drm-engine-capacity-")) { + add_event(&events, &num_events, line, DRM_PMU_UNIT_CAPACITY, + "Engine capacity"); + continue; + } + if (starts_with(line, "drm-engine-")) { + add_event(&events, &num_events, line, DRM_PMU_UNIT_NS, + "Utilization in ns"); + continue; + } + if (starts_with(line, "drm-maxfreq-")) { + add_event(&events, &num_events, line, DRM_PMU_UNIT_HZ, + "Maximum frequency"); + continue; + } + if (starts_with(line, "drm-purgeable-")) { + add_event(&events, &num_events, line, DRM_PMU_UNIT_BYTES, + "Size of resident and purgeable memory bufers"); + continue; + } + if (starts_with(line, "drm-resident-")) { + add_event(&events, &num_events, line, DRM_PMU_UNIT_BYTES, + "Size of resident memory bufers"); + continue; + } + if (starts_with(line, "drm-shared-")) { + add_event(&events, &num_events, line, DRM_PMU_UNIT_BYTES, + "Size of shared memory bufers"); + continue; + } + if (starts_with(line, "drm-total-cycles-")) { + add_event(&events, &num_events, line, DRM_PMU_UNIT_BYTES, + "Total busy cycles"); + continue; + } + if (starts_with(line, "drm-total-")) { + add_event(&events, &num_events, line, DRM_PMU_UNIT_BYTES, + "Size of shared and private memory"); + continue; + } + if (verbose > 1 && starts_with(line, "drm-") && + !starts_with(line, "drm-client-id:") && + !starts_with(line, "drm-pdev:")) + pr_debug("Unhandled DRM PMU fdinfo line match '%s'\n", line); + } + if (drm) { + drm->events = events; + drm->num_events = num_events; + list_add_tail(&drm->pmu.list, pmus); + } + free(line); + if (io.fd != -1) + close(io.fd); + return 0; +} + +void drm_pmu__exit(struct perf_pmu *pmu) +{ + struct drm_pmu *drm = container_of(pmu, struct drm_pmu, pmu); + + free(drm->events); +} + +bool drm_pmu__have_event(const struct perf_pmu *pmu, const char *name) +{ + struct drm_pmu *drm = container_of(pmu, struct drm_pmu, pmu); + + if (!starts_with(name, "drm-")) + return false; + + for (int i = 0; i < drm->num_events; i++) { + if (!strcasecmp(drm->events[i].name, name)) + return true; + } + return false; +} + +int drm_pmu__for_each_event(const struct perf_pmu *pmu, void *state, pmu_event_callback cb) +{ + struct drm_pmu *drm = container_of(pmu, struct drm_pmu, pmu); + + for (int i = 0; i < drm->num_events; i++) { + char encoding_buf[128]; + struct pmu_event_info info = { + .pmu = pmu, + .name = drm->events[i].name, + .alias = NULL, + .scale_unit = drm_pmu_scale_unit_strs[drm->events[i].unit], + .desc = drm->events[i].desc, + .long_desc = NULL, + .encoding_desc = encoding_buf, + .topic = "drm", + .pmu_name = pmu->name, + .event_type_desc = "DRM event", + }; + int ret; + + snprintf(encoding_buf, sizeof(encoding_buf), "%s/config=0x%x/", pmu->name, i); + + ret = cb(state, &info); + if (ret) + return ret; + } + return 0; +} + +size_t drm_pmu__num_events(const struct perf_pmu *pmu) +{ + const struct drm_pmu *drm = container_of(pmu, struct drm_pmu, pmu); + + return drm->num_events; +} + +static int drm_pmu__index_for_event(const struct drm_pmu *drm, const char *name) +{ + for (int i = 0; i < drm->num_events; i++) { + if (!strcmp(drm->events[i].name, name)) + return i; + } + return -1; +} + +static int drm_pmu__config_term(const struct drm_pmu *drm, + struct perf_event_attr *attr, + struct parse_events_term *term, + struct parse_events_error *err) +{ + if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER) { + int i = drm_pmu__index_for_event(drm, term->config); + + if (i >= 0) { + attr->config = i; + return 0; + } + } + if (err) { + char *err_str; + + parse_events_error__handle(err, term->err_val, + asprintf(&err_str, + "unexpected drm event term (%s) %s", + parse_events__term_type_str(term->type_term), + term->config) < 0 + ? strdup("unexpected drm event term") + : err_str, + NULL); + } + return -EINVAL; +} + +int drm_pmu__config_terms(const struct perf_pmu *pmu, + struct perf_event_attr *attr, + struct parse_events_terms *terms, + struct parse_events_error *err) +{ + struct drm_pmu *drm = container_of(pmu, struct drm_pmu, pmu); + struct parse_events_term *term; + + list_for_each_entry(term, &terms->terms, list) { + if (drm_pmu__config_term(drm, attr, term, err)) + return -EINVAL; + } + + return 0; +} + +int drm_pmu__check_alias(const struct perf_pmu *pmu, struct parse_events_terms *terms, + struct perf_pmu_info *info, struct parse_events_error *err) +{ + struct drm_pmu *drm = container_of(pmu, struct drm_pmu, pmu); + struct parse_events_term *term = + list_first_entry(&terms->terms, struct parse_events_term, list); + + if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER) { + int i = drm_pmu__index_for_event(drm, term->config); + + if (i >= 0) { + info->unit = drm_pmu_unit_strs[drm->events[i].unit]; + info->scale = 1; + return 0; + } + } + if (err) { + char *err_str; + + parse_events_error__handle(err, term->err_val, + asprintf(&err_str, + "unexpected drm event term (%s) %s", + parse_events__term_type_str(term->type_term), + term->config) < 0 + ? strdup("unexpected drm event term") + : err_str, + NULL); + } + return -EINVAL; +} + +struct minor_info { + unsigned int *minors; + int minors_num, minors_len; +}; + +static int for_each_drm_fdinfo_in_dir(int (*cb)(void *args, int fdinfo_dir_fd, const char *fd_name), + void *args, int proc_dir, const char *pid_name, + struct minor_info *minors) +{ + char buf[256]; + DIR *fd_dir; + struct dirent *fd_entry; + int fd_dir_fd, fdinfo_dir_fd = -1; + + + scnprintf(buf, sizeof(buf), "%s/fd", pid_name); + fd_dir_fd = openat(proc_dir, buf, O_DIRECTORY); + if (fd_dir_fd == -1) + return 0; /* Presumably lost race to open. */ + fd_dir = fdopendir(fd_dir_fd); + if (!fd_dir) { + close(fd_dir_fd); + return -ENOMEM; + } + while ((fd_entry = readdir(fd_dir)) != NULL) { + struct stat stat; + unsigned int minor; + bool is_dup = false; + int ret; + + if (fd_entry->d_type != DT_LNK) + continue; + + if (fstatat(fd_dir_fd, fd_entry->d_name, &stat, 0) != 0) + continue; + + if ((stat.st_mode & S_IFMT) != S_IFCHR || major(stat.st_rdev) != 226) + continue; + + minor = minor(stat.st_rdev); + for (int i = 0; i < minors->minors_num; i++) { + if (minor(stat.st_rdev) == minors->minors[i]) { + is_dup = true; + break; + } + } + if (is_dup) + continue; + + if (minors->minors_num == minors->minors_len) { + unsigned int *tmp = reallocarray(minors->minors, minors->minors_len + 4, + sizeof(unsigned int)); + + if (tmp) { + minors->minors = tmp; + minors->minors_len += 4; + } + } + minors->minors[minors->minors_num++] = minor; + if (fdinfo_dir_fd == -1) { + /* Open fdinfo dir if we have a DRM fd. */ + scnprintf(buf, sizeof(buf), "%s/fdinfo", pid_name); + fdinfo_dir_fd = openat(proc_dir, buf, O_DIRECTORY); + if (fdinfo_dir_fd == -1) + continue; + } + ret = cb(args, fdinfo_dir_fd, fd_entry->d_name); + if (ret) + return ret; + } + if (fdinfo_dir_fd != -1) + close(fdinfo_dir_fd); + closedir(fd_dir); + return 0; +} + +static int for_each_drm_fdinfo(bool skip_all_duplicates, + int (*cb)(void *args, int fdinfo_dir_fd, const char *fd_name), + void *args) +{ + DIR *proc_dir; + struct dirent *proc_entry; + int ret; + /* + * minors maintains an array of DRM minor device numbers seen for a pid, + * or for all pids if skip_all_duplicates is true, so that duplicates + * are ignored. + */ + struct minor_info minors = { + .minors = NULL, + .minors_num = 0, + .minors_len = 0, + }; + + proc_dir = opendir(procfs__mountpoint()); + if (!proc_dir) + return 0; + + /* Walk through the /proc directory. */ + while ((proc_entry = readdir(proc_dir)) != NULL) { + if (proc_entry->d_type != DT_DIR || + !isdigit(proc_entry->d_name[0])) + continue; + if (!skip_all_duplicates) { + /* Reset the seen minor numbers for each pid. */ + minors.minors_num = 0; + } + ret = for_each_drm_fdinfo_in_dir(cb, args, + dirfd(proc_dir), proc_entry->d_name, + &minors); + if (ret) + break; + } + free(minors.minors); + closedir(proc_dir); + return ret; +} + +int perf_pmus__read_drm_pmus(struct list_head *pmus) +{ + return for_each_drm_fdinfo(/*skip_all_duplicates=*/true, read_drm_pmus_cb, pmus); +} + +int evsel__drm_pmu_open(struct evsel *evsel, + struct perf_thread_map *threads, + int start_cpu_map_idx, int end_cpu_map_idx) +{ + (void)evsel; + (void)threads; + (void)start_cpu_map_idx; + (void)end_cpu_map_idx; + return 0; +} + +static uint64_t read_count_and_apply_unit(const char *count_and_unit, enum drm_pmu_unit unit) +{ + char *unit_ptr = NULL; + uint64_t count = strtoul(count_and_unit, &unit_ptr, 10); + + if (!unit_ptr) + return 0; + + while (isblank(*unit_ptr)) + unit_ptr++; + + switch (unit) { + case DRM_PMU_UNIT_BYTES: + if (*unit_ptr == '\0') + assert(count == 0); /* Generally undocumented, happens for 0. */ + else if (!strcmp(unit_ptr, "KiB")) + count *= 1024; + else if (!strcmp(unit_ptr, "MiB")) + count *= 1024 * 1024; + else + pr_err("Unexpected bytes unit '%s'\n", unit_ptr); + break; + case DRM_PMU_UNIT_CAPACITY: + /* No units expected. */ + break; + case DRM_PMU_UNIT_CYCLES: + /* No units expected. */ + break; + case DRM_PMU_UNIT_HZ: + if (!strcmp(unit_ptr, "Hz")) + count *= 1; + else if (!strcmp(unit_ptr, "KHz")) + count *= 1000; + else if (!strcmp(unit_ptr, "MHz")) + count *= 1000000; + else + pr_err("Unexpected hz unit '%s'\n", unit_ptr); + break; + case DRM_PMU_UNIT_NS: + /* Only unit ns expected. */ + break; + case DRM_PMU_UNIT_MAX: + default: + break; + } + return count; +} + +static uint64_t read_drm_event(int fdinfo_dir_fd, const char *fd_name, + const char *match, enum drm_pmu_unit unit) +{ + char buf[640]; + struct io io; + char *line = NULL; + size_t line_len; + uint64_t count = 0; + + io__init(&io, openat(fdinfo_dir_fd, fd_name, O_RDONLY), buf, sizeof(buf)); + if (io.fd == -1) { + /* Failed to open file, ignore. */ + return 0; + } + while (io__getline(&io, &line, &line_len) > 0) { + size_t i = strlen(match); + + if (strncmp(line, match, i)) + continue; + if (line[i] != ':') + continue; + while (isblank(line[++i])) + ; + if (line[line_len - 1] == '\n') + line[line_len - 1] = '\0'; + count = read_count_and_apply_unit(&line[i], unit); + break; + } + close(io.fd); + return count; +} + +struct read_drm_event_cb_args { + const char *match; + uint64_t count; + enum drm_pmu_unit unit; +}; + +static int read_drm_event_cb(void *vargs, int fdinfo_dir_fd, const char *fd_name) +{ + struct read_drm_event_cb_args *args = vargs; + + args->count += read_drm_event(fdinfo_dir_fd, fd_name, args->match, args->unit); + return 0; +} + +static uint64_t drm_pmu__read_system_wide(struct drm_pmu *drm, struct evsel *evsel) +{ + struct read_drm_event_cb_args args = { + .count = 0, + .match = drm->events[evsel->core.attr.config].name, + .unit = drm->events[evsel->core.attr.config].unit, + }; + + for_each_drm_fdinfo(/*skip_all_duplicates=*/false, read_drm_event_cb, &args); + return args.count; +} + +static uint64_t drm_pmu__read_for_pid(struct drm_pmu *drm, struct evsel *evsel, int pid) +{ + struct read_drm_event_cb_args args = { + .count = 0, + .match = drm->events[evsel->core.attr.config].name, + .unit = drm->events[evsel->core.attr.config].unit, + }; + struct minor_info minors = { + .minors = NULL, + .minors_num = 0, + .minors_len = 0, + }; + int proc_dir = open(procfs__mountpoint(), O_DIRECTORY); + char pid_name[12]; + int ret; + + if (proc_dir < 0) + return 0; + + snprintf(pid_name, sizeof(pid_name), "%d", pid); + ret = for_each_drm_fdinfo_in_dir(read_drm_event_cb, &args, proc_dir, pid_name, &minors); + free(minors.minors); + close(proc_dir); + return ret == 0 ? args.count : 0; +} + +int evsel__drm_pmu_read(struct evsel *evsel, int cpu_map_idx, int thread) +{ + struct drm_pmu *drm = container_of(evsel->pmu, struct drm_pmu, pmu); + struct perf_counts_values *count, *old_count = NULL; + int pid = perf_thread_map__pid(evsel->core.threads, thread); + uint64_t counter; + + if (pid != -1) + counter = drm_pmu__read_for_pid(drm, evsel, pid); + else + counter = drm_pmu__read_system_wide(drm, evsel); + + if (evsel->prev_raw_counts) + old_count = perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread); + + count = perf_counts(evsel->counts, cpu_map_idx, thread); + if (old_count) { + count->val = old_count->val + counter; + count->run = old_count->run + 1; + count->ena = old_count->ena + 1; + } else { + count->val = counter; + count->run++; + count->ena++; + } + return 0; +} diff --git a/tools/perf/util/drm_pmu.h b/tools/perf/util/drm_pmu.h new file mode 100644 index 000000000000..9fb0e1bdbe03 --- /dev/null +++ b/tools/perf/util/drm_pmu.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */ +#ifndef __DRM_PMU_H +#define __DRM_PMU_H + +#include "pmu.h" +#include <stdbool.h> + +struct list_head; +struct perf_thread_map; + +void drm_pmu__exit(struct perf_pmu *pmu); +bool drm_pmu__have_event(const struct perf_pmu *pmu, const char *name); +int drm_pmu__for_each_event(const struct perf_pmu *pmu, void *state, pmu_event_callback cb); +size_t drm_pmu__num_events(const struct perf_pmu *pmu); +int drm_pmu__config_terms(const struct perf_pmu *pmu, + struct perf_event_attr *attr, + struct parse_events_terms *terms, + struct parse_events_error *err); +int drm_pmu__check_alias(const struct perf_pmu *pmu, struct parse_events_terms *terms, + struct perf_pmu_info *info, struct parse_events_error *err); + + +bool perf_pmu__is_drm(const struct perf_pmu *pmu); +bool evsel__is_drm(const struct evsel *evsel); + +int perf_pmus__read_drm_pmus(struct list_head *pmus); + +int evsel__drm_pmu_open(struct evsel *evsel, + struct perf_thread_map *threads, + int start_cpu_map_idx, int end_cpu_map_idx); +int evsel__drm_pmu_read(struct evsel *evsel, int cpu_map_idx, int thread); + +#endif /* __DRM_PMU_H */ diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 4009f7d58415..f350b32fb19f 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -56,6 +56,7 @@ #include "off_cpu.h" #include "pmu.h" #include "pmus.h" +#include "drm_pmu.h" #include "hwmon_pmu.h" #include "tool_pmu.h" #include "rlimit.h" @@ -1874,6 +1875,9 @@ int evsel__read_counter(struct evsel *evsel, int cpu_map_idx, int thread) if (evsel__is_hwmon(evsel)) return evsel__hwmon_pmu_read(evsel, cpu_map_idx, thread); + if (evsel__is_drm(evsel)) + return evsel__drm_pmu_read(evsel, cpu_map_idx, thread); + if (evsel__is_retire_lat(evsel)) return evsel__read_retire_lat(evsel, cpu_map_idx, thread); @@ -2614,6 +2618,11 @@ static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, start_cpu_map_idx, end_cpu_map_idx); } + if (evsel__is_drm(evsel)) { + return evsel__drm_pmu_open(evsel, threads, + start_cpu_map_idx, + end_cpu_map_idx); + } for (idx = start_cpu_map_idx; idx < end_cpu_map_idx; idx++) { cpu = perf_cpu_map__cpu(cpus, idx); diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index c2a15b0259cf..aa1e52de43b0 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -19,6 +19,7 @@ #include "debug.h" #include "evsel.h" #include "pmu.h" +#include "drm_pmu.h" #include "hwmon_pmu.h" #include "pmus.h" #include "tool_pmu.h" @@ -1550,6 +1551,8 @@ int perf_pmu__config_terms(const struct perf_pmu *pmu, if (perf_pmu__is_hwmon(pmu)) return hwmon_pmu__config_terms(pmu, attr, terms, err); + if (perf_pmu__is_drm(pmu)) + return drm_pmu__config_terms(pmu, attr, terms, err); list_for_each_entry(term, &terms->terms, list) { if (pmu_config_term(pmu, attr, term, terms, zero, apply_hardcoded, err)) @@ -1687,6 +1690,10 @@ int perf_pmu__check_alias(struct perf_pmu *pmu, struct parse_events_terms *head_ ret = hwmon_pmu__check_alias(head_terms, info, err); goto out; } + if (perf_pmu__is_drm(pmu)) { + ret = drm_pmu__check_alias(pmu, head_terms, info, err); + goto out; + } /* Fake PMU doesn't rewrite terms. */ if (perf_pmu__is_fake(pmu)) @@ -1864,6 +1871,8 @@ bool perf_pmu__have_event(struct perf_pmu *pmu, const char *name) return false; if (perf_pmu__is_hwmon(pmu)) return hwmon_pmu__have_event(pmu, name); + if (perf_pmu__is_drm(pmu)) + return drm_pmu__have_event(pmu, name); if (perf_pmu__find_alias(pmu, name, /*load=*/ true) != NULL) return true; if (pmu->cpu_aliases_added || !pmu->events_table) @@ -1877,6 +1886,8 @@ size_t perf_pmu__num_events(struct perf_pmu *pmu) if (perf_pmu__is_hwmon(pmu)) return hwmon_pmu__num_events(pmu); + if (perf_pmu__is_drm(pmu)) + return drm_pmu__num_events(pmu); pmu_aliases_parse(pmu); nr = pmu->sysfs_aliases + pmu->sys_json_aliases; @@ -1943,6 +1954,8 @@ int perf_pmu__for_each_event(struct perf_pmu *pmu, bool skip_duplicate_pmus, if (perf_pmu__is_hwmon(pmu)) return hwmon_pmu__for_each_event(pmu, state, cb); + if (perf_pmu__is_drm(pmu)) + return drm_pmu__for_each_event(pmu, state, cb); strbuf_init(&sb, /*hint=*/ 0); pmu_aliases_parse(pmu); @@ -2410,6 +2423,8 @@ void perf_pmu__delete(struct perf_pmu *pmu) { if (perf_pmu__is_hwmon(pmu)) hwmon_pmu__exit(pmu); + else if (perf_pmu__is_drm(pmu)) + drm_pmu__exit(pmu); perf_pmu__del_formats(&pmu->format); perf_pmu__del_aliases(pmu); diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h index f5306428c03f..2e3fcba5e97e 100644 --- a/tools/perf/util/pmu.h +++ b/tools/perf/util/pmu.h @@ -38,7 +38,9 @@ struct perf_pmu_caps { enum { PERF_PMU_TYPE_PE_START = 0, - PERF_PMU_TYPE_PE_END = 0xFFFEFFFF, + PERF_PMU_TYPE_PE_END = 0xFFFDFFFF, + PERF_PMU_TYPE_DRM_START = 0xFFFE0000, + PERF_PMU_TYPE_DRM_END = 0xFFFEFFFF, PERF_PMU_TYPE_HWMON_START = 0xFFFF0000, PERF_PMU_TYPE_HWMON_END = 0xFFFFFFFD, PERF_PMU_TYPE_TOOL = 0xFFFFFFFE, diff --git a/tools/perf/util/pmus.c b/tools/perf/util/pmus.c index 8a0a919415d4..4636db00524a 100644 --- a/tools/perf/util/pmus.c +++ b/tools/perf/util/pmus.c @@ -12,6 +12,7 @@ #include <unistd.h> #include "cpumap.h" #include "debug.h" +#include "drm_pmu.h" #include "evsel.h" #include "pmus.h" #include "pmu.h" @@ -42,16 +43,19 @@ enum perf_tool_pmu_type { PERF_TOOL_PMU_TYPE_PE_OTHER, PERF_TOOL_PMU_TYPE_TOOL, PERF_TOOL_PMU_TYPE_HWMON, + PERF_TOOL_PMU_TYPE_DRM, #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_DRM_MASK (1 << PERF_TOOL_PMU_TYPE_DRM) #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) + PERF_TOOL_PMU_TYPE_HWMON_MASK | \ + PERF_TOOL_PMU_TYPE_DRM_MASK) }; static unsigned int read_pmu_types; @@ -172,6 +176,8 @@ struct perf_pmu *perf_pmus__find(const char *name) /* 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 (!strncmp(name, "drm_", 4)) + to_read_pmus |= PERF_TOOL_PMU_TYPE_DRM_MASK; else if (!strcmp(name, "tool")) to_read_pmus |= PERF_TOOL_PMU_TYPE_TOOL_MASK; @@ -275,6 +281,10 @@ static void pmu_read_sysfs(unsigned int to_read_types) (read_pmu_types & PERF_TOOL_PMU_TYPE_HWMON_MASK) == 0) perf_pmus__read_hwmon_pmus(&other_pmus); + if ((to_read_types & PERF_TOOL_PMU_TYPE_DRM_MASK) != 0 && + (read_pmu_types & PERF_TOOL_PMU_TYPE_DRM_MASK) == 0) + perf_pmus__read_drm_pmus(&other_pmus); + list_sort(NULL, &other_pmus, pmus_cmp); read_pmu_types |= to_read_types; @@ -307,6 +317,8 @@ struct perf_pmu *perf_pmus__find_by_type(unsigned int type) 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_DRM_START && type <= PERF_PMU_TYPE_DRM_END) { + to_read_pmus = PERF_TOOL_PMU_TYPE_DRM_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 { -- 2.48.1.502.g6dc24dfdaf-goog
