From: Tvrtko Ursulin tvrtko.ursulin@intel.com
Mostly inherited from the perf_pmu, some basic tests, and some tests to verify exported GPU busyness is as expected.
v2: * Skip when kernel does not export drm keys in fdinfo.
Signed-off-by: Tvrtko Ursulin tvrtko.ursulin@intel.com Reviewed-by: Umesh Nerlige Ramappa umesh.nerlige.ramappa@intel.com --- tests/i915/drm_fdinfo.c | 557 ++++++++++++++++++++++++++++++++++++++++ tests/meson.build | 8 + 2 files changed, 565 insertions(+) create mode 100644 tests/i915/drm_fdinfo.c
diff --git a/tests/i915/drm_fdinfo.c b/tests/i915/drm_fdinfo.c new file mode 100644 index 000000000000..3475d35b23b9 --- /dev/null +++ b/tests/i915/drm_fdinfo.c @@ -0,0 +1,557 @@ +/* + * Copyright © 2022 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 "igt.h" +#include "igt_core.h" +#include "igt_device.h" +#include "igt_drm_fdinfo.h" +#include "i915/gem.h" +#include "intel_ctx.h" + +IGT_TEST_DESCRIPTION("Test the i915 drm fdinfo data"); + +const double tolerance = 0.05f; +const unsigned long batch_duration_ns = 500e6; + +#define __assert_within_epsilon(x, ref, tol_up, tol_down) \ + 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",\ + #x, #ref, (double)(x), \ + (tol_up) * 100.0, (tol_down) * 100.0, \ + (double)(ref)) + +#define assert_within_epsilon(x, ref, tolerance) \ + __assert_within_epsilon(x, ref, tolerance, tolerance) + +static void basics(int i915, unsigned int num_classes) +{ + struct drm_client_fdinfo info = { }; + unsigned int ret; + + ret = igt_parse_drm_fdinfo(i915, &info); + igt_assert(ret); + + igt_assert(!strcmp(info.driver, "i915")); + + igt_assert_eq(info.num_engines, num_classes); +} + +/* + * Helper for cases where we assert on time spent sleeping (directly or + * indirectly), so make it more robust by ensuring the system sleep time + * is within test tolerance to start with. + */ +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); +} + +#define TEST_BUSY (1) +#define FLAG_SYNC (2) +#define TEST_TRAILING_IDLE (4) +#define FLAG_HANG (8) +#define TEST_ISOLATION (16) + +static igt_spin_t *__spin_poll(int fd, uint64_t ahnd, const intel_ctx_t *ctx, + const struct intel_execution_engine2 *e) +{ + struct igt_spin_factory opts = { + .ahnd = ahnd, + .ctx = ctx, + .engine = e->flags, + }; + + if (gem_class_can_store_dword(fd, e->class)) + opts.flags |= IGT_SPIN_POLL_RUN; + + return __igt_spin_factory(fd, &opts); +} + +static unsigned long __spin_wait(int fd, igt_spin_t *spin) +{ + struct timespec start = { }; + + igt_nsec_elapsed(&start); + + if (igt_spin_has_poll(spin)) { + unsigned long timeout = 0; + + while (!igt_spin_has_started(spin)) { + unsigned long t = igt_nsec_elapsed(&start); + + igt_assert(gem_bo_busy(fd, spin->handle)); + if ((t - timeout) > 250e6) { + timeout = t; + igt_warn("Spinner not running after %.2fms\n", + (double)t / 1e6); + igt_assert(t < 2e9); + } + } + } else { + igt_debug("__spin_wait - usleep mode\n"); + usleep(500e3); /* Better than nothing! */ + } + + igt_assert(gem_bo_busy(fd, spin->handle)); + return igt_nsec_elapsed(&start); +} + +static igt_spin_t *__spin_sync(int fd, uint64_t ahnd, const intel_ctx_t *ctx, + const struct intel_execution_engine2 *e) +{ + igt_spin_t *spin = __spin_poll(fd, ahnd, ctx, e); + + __spin_wait(fd, spin); + + return spin; +} + +static igt_spin_t *spin_sync(int fd, uint64_t ahnd, const intel_ctx_t *ctx, + const struct intel_execution_engine2 *e) +{ + igt_require_gem(fd); + + return __spin_sync(fd, ahnd, ctx, e); +} + +static void end_spin(int fd, igt_spin_t *spin, unsigned int flags) +{ + if (!spin) + return; + + igt_spin_end(spin); + + if (flags & FLAG_SYNC) + gem_sync(fd, spin->handle); + + if (flags & TEST_TRAILING_IDLE) { + unsigned long t, timeout = 0; + struct timespec start = { }; + + igt_nsec_elapsed(&start); + + do { + t = igt_nsec_elapsed(&start); + + if (gem_bo_busy(fd, spin->handle) && + (t - timeout) > 10e6) { + timeout = t; + igt_warn("Spinner not idle after %.2fms\n", + (double)t / 1e6); + } + + usleep(1e3); + } while (t < batch_duration_ns / 5); + } +} + +static uint64_t read_busy(int i915, unsigned int class) +{ + struct drm_client_fdinfo info = { }; + + igt_assert(igt_parse_drm_fdinfo(i915, &info)); + + return info.busy[class]; +} + +static void +single(int gem_fd, const intel_ctx_t *ctx, + const struct intel_execution_engine2 *e, unsigned int flags) +{ + unsigned long slept; + igt_spin_t *spin; + uint64_t val; + int spin_fd; + uint64_t ahnd; + + if (flags & TEST_ISOLATION) { + spin_fd = gem_reopen_driver(gem_fd); + ctx = intel_ctx_create_all_physical(spin_fd); + } else { + spin_fd = gem_fd; + } + + ahnd = get_reloc_ahnd(spin_fd, ctx->id); + + if (flags & TEST_BUSY) + spin = spin_sync(spin_fd, ahnd, ctx, e); + else + spin = NULL; + + val = read_busy(gem_fd, e->class); + slept = measured_usleep(batch_duration_ns / 1000); + if (flags & TEST_TRAILING_IDLE) + end_spin(spin_fd, spin, flags); + val = read_busy(gem_fd, e->class) - val; + + if (flags & FLAG_HANG) + igt_force_gpu_reset(spin_fd); + else + end_spin(spin_fd, spin, FLAG_SYNC); + + assert_within_epsilon(val, + (flags & TEST_BUSY) && !(flags & TEST_ISOLATION) ? + slept : 0.0f, + tolerance); + + /* Check for idle after hang. */ + if (flags & FLAG_HANG) { + gem_quiescent_gpu(spin_fd); + igt_assert(!gem_bo_busy(spin_fd, spin->handle)); + + val = read_busy(gem_fd, e->class); + slept = measured_usleep(batch_duration_ns / 1000); + val = read_busy(gem_fd, e->class) - val; + + assert_within_epsilon(val, 0, tolerance); + } + + igt_spin_free(spin_fd, spin); + put_ahnd(ahnd); + + gem_quiescent_gpu(spin_fd); +} + +static void log_busy(unsigned int num_engines, uint64_t *val) +{ + char buf[1024]; + int rem = sizeof(buf); + unsigned int i; + char *p = buf; + + for (i = 0; i < num_engines; i++) { + int len; + + len = snprintf(p, rem, "%u=%" PRIu64 "\n", i, val[i]); + igt_assert(len > 0); + rem -= len; + p += len; + } + + igt_info("%s", buf); +} + +static void read_busy_all(int i915, uint64_t *val) +{ + struct drm_client_fdinfo info = { }; + + igt_assert(igt_parse_drm_fdinfo(i915, &info)); + + memcpy(val, info.busy, sizeof(info.busy)); +} + +static void +busy_check_all(int gem_fd, const intel_ctx_t *ctx, + const struct intel_execution_engine2 *e, + const unsigned int num_engines, + const unsigned int classes[16], const unsigned int num_classes, + unsigned int flags) +{ + uint64_t ahnd = get_reloc_ahnd(gem_fd, ctx->id); + uint64_t tval[2][16]; + unsigned long slept; + uint64_t val[16]; + igt_spin_t *spin; + unsigned int i; + + memset(tval, 0, sizeof(tval)); + + spin = spin_sync(gem_fd, ahnd, ctx, e); + + read_busy_all(gem_fd, tval[0]); + slept = measured_usleep(batch_duration_ns / 1000); + if (flags & TEST_TRAILING_IDLE) + end_spin(gem_fd, spin, flags); + read_busy_all(gem_fd, tval[1]); + + end_spin(gem_fd, spin, FLAG_SYNC); + igt_spin_free(gem_fd, spin); + put_ahnd(ahnd); + + for (i = 0; i < num_classes; i++) + val[i] = tval[1][i] - tval[0][i]; + + log_busy(num_classes, val); + + for (i = 0; i < num_classes; i++) { + double target = i == e->class ? slept : 0.0f; + + assert_within_epsilon(val[i], target, tolerance); + } + + gem_quiescent_gpu(gem_fd); +} + +static void +__submit_spin(int gem_fd, igt_spin_t *spin, + const struct intel_execution_engine2 *e, + int offset) +{ + struct drm_i915_gem_execbuffer2 eb = spin->execbuf; + + eb.flags &= ~(0x3f | I915_EXEC_BSD_MASK); + eb.flags |= e->flags | I915_EXEC_NO_RELOC; + eb.batch_start_offset += offset; + + gem_execbuf(gem_fd, &eb); +} + +static void +most_busy_check_all(int gem_fd, const intel_ctx_t *ctx, + const struct intel_execution_engine2 *e, + const unsigned int num_engines, + const unsigned int classes[16], + const unsigned int num_classes, + unsigned int flags) +{ + uint64_t ahnd = get_reloc_ahnd(gem_fd, ctx->id); + unsigned int busy_class[num_classes]; + struct intel_execution_engine2 *e_; + igt_spin_t *spin = NULL; + uint64_t tval[2][16]; + unsigned long slept; + uint64_t val[16]; + unsigned int i; + + memset(busy_class, 0, sizeof(busy_class)); + memset(tval, 0, sizeof(tval)); + + for_each_ctx_engine(gem_fd, ctx, e_) { + if (e->class == e_->class && e->instance == e_->instance) { + continue; + } else if (spin) { + __submit_spin(gem_fd, spin, e_, 64); + busy_class[e_->class]++; + } else { + spin = __spin_poll(gem_fd, ahnd, ctx, e_); + busy_class[e_->class]++; + } + } + igt_require(spin); /* at least one busy engine */ + + /* Small delay to allow engines to start. */ + usleep(__spin_wait(gem_fd, spin) * num_engines / 1e3); + + read_busy_all(gem_fd, tval[0]); + slept = measured_usleep(batch_duration_ns / 1000); + if (flags & TEST_TRAILING_IDLE) + end_spin(gem_fd, spin, flags); + read_busy_all(gem_fd, tval[1]); + + end_spin(gem_fd, spin, FLAG_SYNC); + igt_spin_free(gem_fd, spin); + put_ahnd(ahnd); + + for (i = 0; i < num_classes; i++) + val[i] = tval[1][i] - tval[0][i]; + + log_busy(num_classes, val); + + for (i = 0; i < num_classes; i++) { + double target = slept * busy_class[i]; + + assert_within_epsilon(val[i], target, tolerance); + } + gem_quiescent_gpu(gem_fd); +} + +static void +all_busy_check_all(int gem_fd, const intel_ctx_t *ctx, + const unsigned int num_engines, + const unsigned int classes[16], + const unsigned int num_classes, + unsigned int flags) +{ + uint64_t ahnd = get_reloc_ahnd(gem_fd, ctx->id); + unsigned int busy_class[num_classes]; + struct intel_execution_engine2 *e; + igt_spin_t *spin = NULL; + uint64_t tval[2][16]; + unsigned long slept; + uint64_t val[16]; + unsigned int i; + + memset(busy_class, 0, sizeof(busy_class)); + memset(tval, 0, sizeof(tval)); + + for_each_ctx_engine(gem_fd, ctx, e) { + if (spin) + __submit_spin(gem_fd, spin, e, 64); + else + spin = __spin_poll(gem_fd, ahnd, ctx, e); + busy_class[e->class]++; + } + + /* Small delay to allow engines to start. */ + usleep(__spin_wait(gem_fd, spin) * num_engines / 1e3); + + read_busy_all(gem_fd, tval[0]); + slept = measured_usleep(batch_duration_ns / 1000); + if (flags & TEST_TRAILING_IDLE) + end_spin(gem_fd, spin, flags); + read_busy_all(gem_fd, tval[1]); + + end_spin(gem_fd, spin, FLAG_SYNC); + igt_spin_free(gem_fd, spin); + put_ahnd(ahnd); + + for (i = 0; i < num_classes; i++) + val[i] = tval[1][i] - tval[0][i]; + + log_busy(num_classes, val); + + for (i = 0; i < num_classes; i++) { + double target = slept * busy_class[i]; + + assert_within_epsilon(val[i], target, tolerance); + } + gem_quiescent_gpu(gem_fd); +} + +#define test_each_engine(T, i915, ctx, e) \ + igt_subtest_with_dynamic(T) for_each_ctx_engine(i915, ctx, e) \ + igt_dynamic_f("%s", e->name) + +igt_main +{ + unsigned int num_engines = 0, num_classes = 0; + const struct intel_execution_engine2 *e; + unsigned int classes[16] = { }; + const intel_ctx_t *ctx = NULL; + int i915 = -1; + + igt_fixture { + struct drm_client_fdinfo info = { }; + unsigned int i; + + i915 = __drm_open_driver(DRIVER_INTEL); + + igt_require_gem(i915); + igt_require(igt_parse_drm_fdinfo(i915, &info)); + + ctx = intel_ctx_create_all_physical(i915); + + for_each_ctx_engine(i915, ctx, e) { + num_engines++; + igt_assert(e->class < ARRAY_SIZE(classes)); + classes[e->class]++; + } + igt_require(num_engines); + + for (i = 0; i < ARRAY_SIZE(classes); i++) { + if (classes[i]) + num_classes++; + } + igt_assert(num_classes); + } + + /** + * Test basic fdinfo content. + */ + igt_subtest("basics") + basics(i915, num_classes); + + /** + * Test that engines show no load when idle. + */ + test_each_engine("idle", i915, ctx, e) + single(i915, ctx, e, 0); + + /** + * Test that a single engine reports load correctly. + */ + test_each_engine("busy", i915, ctx, e) + single(i915, ctx, e, TEST_BUSY); + + test_each_engine("busy-idle", i915, ctx, e) + single(i915, ctx, e, TEST_BUSY | TEST_TRAILING_IDLE); + + test_each_engine("busy-hang", i915, ctx, e) { + igt_hang_t hang = igt_allow_hang(i915, ctx->id, 0); + + single(i915, ctx, e, TEST_BUSY | FLAG_HANG); + + igt_disallow_hang(i915, hang); + } + + /** + * Test that when one engine is loaded other report no + * load. + */ + test_each_engine("busy-check-all", i915, ctx, e) + busy_check_all(i915, ctx, e, num_engines, classes, num_classes, + TEST_BUSY); + + test_each_engine("busy-idle-check-all", i915, ctx, e) + busy_check_all(i915, ctx, e, num_engines, classes, num_classes, + TEST_BUSY | TEST_TRAILING_IDLE); + + /** + * Test that when all except one engine are loaded all + * loads are correctly reported. + */ + test_each_engine("most-busy-check-all", i915, ctx, e) + most_busy_check_all(i915, ctx, e, num_engines, + classes, num_classes, + TEST_BUSY); + + test_each_engine("most-busy-idle-check-all", i915, ctx, e) + most_busy_check_all(i915, ctx, e, num_engines, + classes, num_classes, + TEST_BUSY | TEST_TRAILING_IDLE); + + /** + * Test that when all engines are loaded all loads are + * correctly reported. + */ + igt_subtest("all-busy-check-all") + all_busy_check_all(i915, ctx, num_engines, classes, num_classes, + TEST_BUSY); + + igt_subtest("all-busy-idle-check-all") + all_busy_check_all(i915, ctx, num_engines, classes, num_classes, + TEST_BUSY | TEST_TRAILING_IDLE); + + /** + * Test for no cross-client contamination. + */ + test_each_engine("isolation", i915, ctx, e) + single(i915, ctx, e, TEST_BUSY | TEST_ISOLATION); + + igt_fixture { + intel_ctx_destroy(i915, ctx); + close(i915); + } +} diff --git a/tests/meson.build b/tests/meson.build index a152d2a05291..b0eab3d6c8e3 100644 --- a/tests/meson.build +++ b/tests/meson.build @@ -293,6 +293,14 @@ foreach prog : i915_progs test_list += prog endforeach
+test_executables += executable('drm_fdinfo', + join_paths('i915', 'drm_fdinfo.c'), + dependencies : test_deps + [ lib_igt_drm_fdinfo ], + install_dir : libexecdir, + install_rpath : libexecdir_rpathdir, + install : true) +test_list += 'drm_fdinfo' + test_executables += executable('dumb_buffer', 'dumb_buffer.c', dependencies : test_deps + [ libatomic ], install_dir : libexecdir,