diff options
Diffstat (limited to 'src/intel/perf/gen_perf.c')
| -rw-r--r-- | src/intel/perf/gen_perf.c | 435 |
1 files changed, 435 insertions, 0 deletions
diff --git a/src/intel/perf/gen_perf.c b/src/intel/perf/gen_perf.c new file mode 100644 index 00000000000..bc26cff9c99 --- /dev/null +++ b/src/intel/perf/gen_perf.c @@ -0,0 +1,435 @@ +/* + * Copyright © 2018 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include <dirent.h> + +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <unistd.h> +#include <errno.h> + +#include <drm-uapi/i915_drm.h> + +#include "gen_perf.h" +#include "perf/gen_perf_metrics.h" + +#include "dev/gen_debug.h" +#include "dev/gen_device_info.h" +#include "util/bitscan.h" + +#define FILE_DEBUG_FLAG DEBUG_PERFMON + +static bool +get_sysfs_dev_dir(struct gen_perf *perf, int fd) +{ + struct stat sb; + int min, maj; + DIR *drmdir; + struct dirent *drm_entry; + int len; + + perf->sysfs_dev_dir[0] = '\0'; + + if (fstat(fd, &sb)) { + DBG("Failed to stat DRM fd\n"); + return false; + } + + maj = major(sb.st_rdev); + min = minor(sb.st_rdev); + + if (!S_ISCHR(sb.st_mode)) { + DBG("DRM fd is not a character device as expected\n"); + return false; + } + + len = snprintf(perf->sysfs_dev_dir, + sizeof(perf->sysfs_dev_dir), + "/sys/dev/char/%d:%d/device/drm", maj, min); + if (len < 0 || len >= sizeof(perf->sysfs_dev_dir)) { + DBG("Failed to concatenate sysfs path to drm device\n"); + return false; + } + + drmdir = opendir(perf->sysfs_dev_dir); + if (!drmdir) { + DBG("Failed to open %s: %m\n", perf->sysfs_dev_dir); + return false; + } + + while ((drm_entry = readdir(drmdir))) { + if ((drm_entry->d_type == DT_DIR || + drm_entry->d_type == DT_LNK) && + strncmp(drm_entry->d_name, "card", 4) == 0) + { + len = snprintf(perf->sysfs_dev_dir, + sizeof(perf->sysfs_dev_dir), + "/sys/dev/char/%d:%d/device/drm/%s", + maj, min, drm_entry->d_name); + closedir(drmdir); + if (len < 0 || len >= sizeof(perf->sysfs_dev_dir)) + return false; + else + return true; + } + } + + closedir(drmdir); + + DBG("Failed to find cardX directory under /sys/dev/char/%d:%d/device/drm\n", + maj, min); + + return false; +} + +static bool +read_file_uint64(const char *file, uint64_t *val) +{ + char buf[32]; + int fd, n; + + fd = open(file, 0); + if (fd < 0) + return false; + while ((n = read(fd, buf, sizeof (buf) - 1)) < 0 && + errno == EINTR); + close(fd); + if (n < 0) + return false; + + buf[n] = '\0'; + *val = strtoull(buf, NULL, 0); + + return true; +} + +static bool +read_sysfs_drm_device_file_uint64(struct gen_perf *perf, + const char *file, + uint64_t *value) +{ + char buf[512]; + int len; + + len = snprintf(buf, sizeof(buf), "%s/%s", perf->sysfs_dev_dir, file); + if (len < 0 || len >= sizeof(buf)) { + DBG("Failed to concatenate sys filename to read u64 from\n"); + return false; + } + + return read_file_uint64(buf, value); +} + +static void +register_oa_config(struct gen_perf *perf, + const struct gen_perf_query_info *query, + uint64_t config_id) +{ + struct gen_perf_query_info *registred_query = + gen_perf_query_append_query_info(perf, 0); + + *registred_query = *query; + registred_query->oa_metrics_set_id = config_id; + DBG("metric set registred: id = %" PRIu64", guid = %s\n", + registred_query->oa_metrics_set_id, query->guid); +} + +static void +enumerate_sysfs_metrics(struct gen_perf *perf) +{ + DIR *metricsdir = NULL; + struct dirent *metric_entry; + char buf[256]; + int len; + + len = snprintf(buf, sizeof(buf), "%s/metrics", perf->sysfs_dev_dir); + if (len < 0 || len >= sizeof(buf)) { + DBG("Failed to concatenate path to sysfs metrics/ directory\n"); + return; + } + + metricsdir = opendir(buf); + if (!metricsdir) { + DBG("Failed to open %s: %m\n", buf); + return; + } + + while ((metric_entry = readdir(metricsdir))) { + struct hash_entry *entry; + + if ((metric_entry->d_type != DT_DIR && + metric_entry->d_type != DT_LNK) || + metric_entry->d_name[0] == '.') + continue; + + DBG("metric set: %s\n", metric_entry->d_name); + entry = _mesa_hash_table_search(perf->oa_metrics_table, + metric_entry->d_name); + if (entry) { + uint64_t id; + + len = snprintf(buf, sizeof(buf), "%s/metrics/%s/id", + perf->sysfs_dev_dir, metric_entry->d_name); + if (len < 0 || len >= sizeof(buf)) { + DBG("Failed to concatenate path to sysfs metric id file\n"); + continue; + } + + if (!read_file_uint64(buf, &id)) { + DBG("Failed to read metric set id from %s: %m", buf); + continue; + } + + register_oa_config(perf, (const struct gen_perf_query_info *)entry->data, id); + } else + DBG("metric set not known by mesa (skipping)\n"); + } + + closedir(metricsdir); +} + +static bool +kernel_has_dynamic_config_support(struct gen_perf *perf, int fd) +{ + hash_table_foreach(perf->oa_metrics_table, entry) { + struct gen_perf_query_info *query = entry->data; + char config_path[280]; + uint64_t config_id; + + snprintf(config_path, sizeof(config_path), "%s/metrics/%s/id", + perf->sysfs_dev_dir, query->guid); + + /* Look for the test config, which we know we can't replace. */ + if (read_file_uint64(config_path, &config_id) && config_id == 1) { + return perf->ioctl(fd, DRM_IOCTL_I915_PERF_REMOVE_CONFIG, + &config_id) < 0 && errno == ENOENT; + } + } + + return false; +} + +bool +gen_perf_load_metric_id(struct gen_perf *perf, const char *guid, + uint64_t *metric_id) +{ + char config_path[280]; + + snprintf(config_path, sizeof(config_path), "%s/metrics/%s/id", + perf->sysfs_dev_dir, guid); + + /* Don't recreate already loaded configs. */ + return read_file_uint64(config_path, metric_id); +} + +static void +init_oa_configs(struct gen_perf *perf, int fd) +{ + hash_table_foreach(perf->oa_metrics_table, entry) { + const struct gen_perf_query_info *query = entry->data; + struct drm_i915_perf_oa_config config; + uint64_t config_id; + int ret; + + if (gen_perf_load_metric_id(perf, query->guid, &config_id)) { + DBG("metric set: %s (already loaded)\n", query->guid); + register_oa_config(perf, query, config_id); + continue; + } + + memset(&config, 0, sizeof(config)); + + memcpy(config.uuid, query->guid, sizeof(config.uuid)); + + config.n_mux_regs = query->n_mux_regs; + config.mux_regs_ptr = (uintptr_t) query->mux_regs; + + config.n_boolean_regs = query->n_b_counter_regs; + config.boolean_regs_ptr = (uintptr_t) query->b_counter_regs; + + config.n_flex_regs = query->n_flex_regs; + config.flex_regs_ptr = (uintptr_t) query->flex_regs; + + ret = perf->ioctl(fd, DRM_IOCTL_I915_PERF_ADD_CONFIG, &config); + if (ret < 0) { + DBG("Failed to load \"%s\" (%s) metrics set in kernel: %s\n", + query->name, query->guid, strerror(errno)); + continue; + } + + register_oa_config(perf, query, ret); + DBG("metric set: %s (added)\n", query->guid); + } +} + +static void +compute_topology_builtins(struct gen_perf *perf, + const struct gen_device_info *devinfo) +{ + perf->sys_vars.slice_mask = devinfo->slice_masks; + perf->sys_vars.n_eu_slices = devinfo->num_slices; + + for (int i = 0; i < sizeof(devinfo->subslice_masks[i]); i++) { + perf->sys_vars.n_eu_sub_slices += + __builtin_popcount(devinfo->subslice_masks[i]); + } + + for (int i = 0; i < sizeof(devinfo->eu_masks); i++) + perf->sys_vars.n_eus += __builtin_popcount(devinfo->eu_masks[i]); + + perf->sys_vars.eu_threads_count = + perf->sys_vars.n_eus * devinfo->num_thread_per_eu; + + /* The subslice mask builtin contains bits for all slices. Prior to Gen11 + * it had groups of 3bits for each slice, on Gen11 it's 8bits for each + * slice. + * + * Ideally equations would be updated to have a slice/subslice query + * function/operator. + */ + perf->sys_vars.subslice_mask = 0; + + int bits_per_subslice = devinfo->gen == 11 ? 8 : 3; + + for (int s = 0; s < util_last_bit(devinfo->slice_masks); s++) { + for (int ss = 0; ss < (devinfo->subslice_slice_stride * 8); ss++) { + if (gen_device_info_subslice_available(devinfo, s, ss)) + perf->sys_vars.subslice_mask |= 1ULL << (s * bits_per_subslice + ss); + } + } +} + +static bool +init_oa_sys_vars(struct gen_perf *perf, const struct gen_device_info *devinfo) +{ + uint64_t min_freq_mhz = 0, max_freq_mhz = 0; + + if (!read_sysfs_drm_device_file_uint64(perf, "gt_min_freq_mhz", &min_freq_mhz)) + return false; + + if (!read_sysfs_drm_device_file_uint64(perf, "gt_max_freq_mhz", &max_freq_mhz)) + return false; + + memset(&perf->sys_vars, 0, sizeof(perf->sys_vars)); + perf->sys_vars.gt_min_freq = min_freq_mhz * 1000000; + perf->sys_vars.gt_max_freq = max_freq_mhz * 1000000; + perf->sys_vars.timestamp_frequency = devinfo->timestamp_frequency; + perf->sys_vars.revision = devinfo->revision; + compute_topology_builtins(perf, devinfo); + + return true; +} + +typedef void (*perf_register_oa_queries_t)(struct gen_perf *); + +static perf_register_oa_queries_t +get_register_queries_function(const struct gen_device_info *devinfo) +{ + if (devinfo->is_haswell) + return gen_oa_register_queries_hsw; + if (devinfo->is_cherryview) + return gen_oa_register_queries_chv; + if (devinfo->is_broadwell) + return gen_oa_register_queries_bdw; + if (devinfo->is_broxton) + return gen_oa_register_queries_bxt; + if (devinfo->is_skylake) { + if (devinfo->gt == 2) + return gen_oa_register_queries_sklgt2; + if (devinfo->gt == 3) + return gen_oa_register_queries_sklgt3; + if (devinfo->gt == 4) + return gen_oa_register_queries_sklgt4; + } + if (devinfo->is_kabylake) { + if (devinfo->gt == 2) + return gen_oa_register_queries_kblgt2; + if (devinfo->gt == 3) + return gen_oa_register_queries_kblgt3; + } + if (devinfo->is_geminilake) + return gen_oa_register_queries_glk; + if (devinfo->is_coffeelake) { + if (devinfo->gt == 2) + return gen_oa_register_queries_cflgt2; + if (devinfo->gt == 3) + return gen_oa_register_queries_cflgt3; + } + if (devinfo->is_cannonlake) + return gen_oa_register_queries_cnl; + + return NULL; +} + +bool +gen_perf_load_oa_metrics(struct gen_perf *perf, int fd, + const struct gen_device_info *devinfo) +{ + perf_register_oa_queries_t oa_register = get_register_queries_function(devinfo); + bool i915_perf_oa_available = false; + struct stat sb; + + /* The existence of this sysctl parameter implies the kernel supports + * the i915 perf interface. + */ + if (stat("/proc/sys/dev/i915/perf_stream_paranoid", &sb) == 0) { + + /* If _paranoid == 1 then on Gen8+ we won't be able to access OA + * metrics unless running as root. + */ + if (devinfo->is_haswell) + i915_perf_oa_available = true; + else { + uint64_t paranoid = 1; + + read_file_uint64("/proc/sys/dev/i915/perf_stream_paranoid", ¶noid); + + if (paranoid == 0 || geteuid() == 0) + i915_perf_oa_available = true; + } + } + + if (!i915_perf_oa_available || + !oa_register || + !get_sysfs_dev_dir(perf, fd) || + !init_oa_sys_vars(perf, devinfo)) + return false; + + perf->oa_metrics_table = + _mesa_hash_table_create(perf, _mesa_key_hash_string, + _mesa_key_string_equal); + + /* Index all the metric sets mesa knows about before looking to see what + * the kernel is advertising. + */ + oa_register(perf); + + if (likely((INTEL_DEBUG & DEBUG_NO_OACONFIG) == 0) && + kernel_has_dynamic_config_support(perf, fd)) + init_oa_configs(perf, fd); + else + enumerate_sysfs_metrics(perf); + + return true; +} |