Simple tests for validating the PMU implementation for GT C6 residencies. These tests validate the kernel series which is currently in review here - https://patchwork.freedesktop.org/series/139121/ v2: Rename rc6-residency-* to gt-c6-residency and remove freq tests. v3: Keep just gt-c6 tests, add frequency tests later. Cc: Lucas De Marchi <lucas.demarchi@xxxxxxxxx> Cc: Riana Tauro <riana.tauro@xxxxxxxxx> Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@xxxxxxxxx> --- lib/igt_perf.c | 8 +- lib/igt_perf.h | 2 + tests/intel/xe_pmu.c | 191 +++++++++++++++++++++++++++++++++++++++++++ tests/meson.build | 1 + 4 files changed, 201 insertions(+), 1 deletion(-) create mode 100644 tests/intel/xe_pmu.c diff --git a/lib/igt_perf.c b/lib/igt_perf.c index e333744bb..b8367cd5e 100644 --- a/lib/igt_perf.c +++ b/lib/igt_perf.c @@ -153,7 +153,7 @@ int perf_xe_event_config(const char *device, const char *event, uint64_t *config return ret; buf[ret] = '\0'; - ret = sscanf(buf, "config=0x%lx", config); + ret = sscanf(buf, "event=0x%lx", config); if (ret != 1) return -EINVAL; @@ -251,6 +251,12 @@ int perf_xe_open(int xe, uint64_t config) PERF_FORMAT_TOTAL_TIME_ENABLED); } +int perf_xe_open_group(int xe, uint64_t config, int group) +{ + return _perf_open(xe_perf_type_id(xe), config, group, + PERF_FORMAT_TOTAL_TIME_ENABLED | PERF_FORMAT_GROUP); +} + int perf_i915_open(int i915, uint64_t config) { return _perf_open(i915_perf_type_id(i915), config, -1, diff --git a/lib/igt_perf.h b/lib/igt_perf.h index f51c44bb2..e268fb4ff 100644 --- a/lib/igt_perf.h +++ b/lib/igt_perf.h @@ -55,6 +55,7 @@ perf_event_open(struct perf_event_attr *attr, uint64_t igt_perf_type_id(const char *device); int igt_perf_events_dir(int i915); +int igt_xe_perf_events_dir(int xe); int igt_perf_open(uint64_t type, uint64_t config); int igt_perf_open_group(uint64_t type, uint64_t config, int group); @@ -71,6 +72,7 @@ int perf_i915_open(int i915, uint64_t config); int perf_i915_open_group(int i915, uint64_t config, int group); int perf_xe_open(int xe, uint64_t config); +int perf_xe_open_group(int xe, uint64_t config, int group); int perf_xe_event_config(const char *device, const char *event, uint64_t *config); int perf_xe_event_format_gt(const char *device); diff --git a/tests/intel/xe_pmu.c b/tests/intel/xe_pmu.c new file mode 100644 index 000000000..929de8082 --- /dev/null +++ b/tests/intel/xe_pmu.c @@ -0,0 +1,191 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2025 Intel Corporation + */ + +/** + * TEST: Test Xe PMU functionality + * Category: Perf Monitoring Unit + * Mega feature: Perf Monitoring Unit + * Sub-category: Power Management + * Functionality: Power/Perf + * Test category: Functional tests + */ + +#include <fcntl.h> +#include <limits.h> +#include <time.h> +#include <errno.h> +#include <dirent.h> +#include <string.h> +#include <sys/time.h> + +#include "igt.h" +#include "igt_device.h" +#include "igt_power.h" +#include "igt_sysfs.h" +#include "igt_perf.h" + +#include "lib/igt_syncobj.h" +#include "xe/xe_ioctl.h" +#include "xe/xe_gt.h" +#include "xe/xe_query.h" +#include "xe/xe_spin.h" +#include "xe/xe_util.h" + +#define SLEEP_DURATION 2 /* in seconds */ +const double tolerance = 0.1; +const unsigned long batch_duration_ns = 500e6; +const char *no_debug_data = "\0"; + +#define __assert_within_epsilon(x, ref, tol_up, tol_down, debug_data) \ + igt_assert_f((double)(x) <= (1.0 + (tol_up)) * (double)(ref) && \ + (double)(x) >= (1.0 - (tol_down)) * (double)(ref), \ + "'%s' != '%s' (%f not within +%.1f%%/-%.1f%% tolerance of %f)\n%s\n",\ + #x, #ref, (double)(x), \ + (tol_up) * 100.0, (tol_down) * 100.0, \ + (double)(ref), debug_data) + +#define assert_within_epsilon(x, ref, tolerance) \ + __assert_within_epsilon(x, ref, tolerance, tolerance, no_debug_data) + +#define assert_within_epsilon_debug(x, ref, tolerance, debug_data) \ + __assert_within_epsilon(x, ref, tolerance, tolerance, debug_data) + +struct workload { + struct drm_xe_sync sync[2]; + struct drm_xe_exec exec; + uint64_t addr; + struct xe_spin_opts spin_opts; + struct xe_spin *spin; + uint32_t exec_queue; + uint32_t syncobj; + size_t bo_size; + uint32_t bo; + uint32_t vm; +}; + +static int open_pmu(int xe, uint64_t config) +{ + int fd; + + fd = perf_xe_open(xe, config); + igt_skip_on(fd < 0 && errno == ENODEV); + igt_assert(fd >= 0); + + return fd; +} + +static uint64_t __pmu_read_single(int fd, uint64_t *ts) +{ + uint64_t data[2]; + + igt_assert_eq(read(fd, data, sizeof(data)), sizeof(data)); + if (ts) + *ts = data[1]; + + return data[0]; +} + +/** + * SUBTEST: c6 + * Description: Basic residency test to validate idle residency + * measured over a time interval is within the tolerance + */ +static unsigned int measured_usleep(unsigned int usec) +{ + struct timespec ts = { }; + unsigned int slept; + + slept = igt_nsec_elapsed(&ts); + igt_assert(slept == 0); + do { + usleep(usec - slept); + slept = igt_nsec_elapsed(&ts) / 1000; + } while (slept < usec); + + return igt_nsec_elapsed(&ts) / 1000; +} + +static unsigned long read_idle_residency(int fd, int gt) +{ + unsigned long residency = 0; + int gt_fd; + + gt_fd = xe_sysfs_gt_open(fd, gt); + igt_assert(gt_fd >= 0); + igt_assert(igt_sysfs_scanf(gt_fd, "gtidle/idle_residency_ms", "%lu", &residency) == 1); + close(gt_fd); + + return residency; +} + +static u64 get_event_config(int xe, unsigned int gt, char *event) +{ + int ret; + char xe_device[100]; + u64 pmu_config; + u32 gt_shift; + + xe_perf_device(xe, xe_device, sizeof(xe_device)); + ret = perf_xe_event_config(xe_device, event, &pmu_config); + igt_assert(ret >= 0); + gt_shift = perf_xe_event_format_gt(xe_device); + pmu_config |= (u64) gt << gt_shift; + + return pmu_config; +} + +static void test_c6(int xe, unsigned int gt) +{ + int pmu_fd; + u64 pmu_config; + char event[100]; + uint64_t ts[2]; + unsigned long slept, start, end; + uint64_t val; + + /* Get the PMU config for the c6 event */ + sprintf(event, "gt-c6-residency"); + pmu_config = get_event_config(xe, gt, event); + + pmu_fd = open_pmu(xe, pmu_config); + + igt_require_f(igt_wait(xe_gt_is_in_c6(xe, gt), 1000, 10), "GT %d should be in C6\n", gt); + + /* While idle check full RC6. */ + start = read_idle_residency(xe, gt); + val = __pmu_read_single(pmu_fd, &ts[0]); + slept = measured_usleep(SLEEP_DURATION * USEC_PER_SEC) / 1000; + end = read_idle_residency(xe, gt); + val = __pmu_read_single(pmu_fd, &ts[1]) - val; + + igt_debug("gt%u: slept=%lu, perf=%"PRIu64"\n", + gt, slept, val); + + igt_debug("Start res: %lu, end_res: %lu", start, end); + + assert_within_epsilon(val, + (ts[1] - ts[0])/1000000, + tolerance); + close(pmu_fd); +} + +igt_main +{ + int fd, gt; + + igt_fixture { + fd = drm_open_driver(DRIVER_XE); + igt_require(!IS_PONTEVECCHIO(xe_dev_id(fd))); + } + + igt_describe("Validate PMU C6 residency counters"); + igt_subtest("c6") + xe_for_each_gt(fd, gt) + test_c6(fd, gt); + + igt_fixture { + close(fd); + } +} diff --git a/tests/meson.build b/tests/meson.build index 33dffad31..d20f50766 100644 --- a/tests/meson.build +++ b/tests/meson.build @@ -309,6 +309,7 @@ intel_xe_progs = [ 'xe_pat', 'xe_peer2peer', 'xe_pm', + 'xe_pmu', 'xe_pm_residency', 'xe_prime_self_import', 'xe_query', -- 2.38.1
