Exercise some new API that allows applications to request that
individual contexts are executed within a desired frequency range.
v2: Split single/continuous set_freq subtests
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
tests/Makefile.am | 1 +
tests/Makefile.sources | 1 +
tests/gem_ctx_freq.c | 604 +++++++++++++++++++++++++++++++++++++++++++++++++
tests/meson.build | 1 +
4 files changed, 607 insertions(+)
create mode 100644 tests/gem_ctx_freq.c
diff --git a/tests/Makefile.am b/tests/Makefile.am
index dbc7be72..389f7fc7 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -104,6 +104,7 @@ drm_import_export_CFLAGS = $(AM_CFLAGS) $(THREAD_CFLAGS)
drm_import_export_LDADD = $(LDADD) -lpthread
gem_close_race_CFLAGS = $(AM_CFLAGS) $(THREAD_CFLAGS)
gem_close_race_LDADD = $(LDADD) -lpthread
+gem_ctx_freq_LDADD = $(LDADD) $(top_builddir)/lib/libigt_perf.la
gem_ctx_thrash_CFLAGS = $(AM_CFLAGS) $(THREAD_CFLAGS)
gem_ctx_thrash_LDADD = $(LDADD) -lpthread
gem_exec_parallel_CFLAGS = $(AM_CFLAGS) $(THREAD_CFLAGS)
diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 4a81ac4a..3d079c42 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -58,6 +58,7 @@ TESTS_progs = \
gem_ctx_bad_exec \
gem_ctx_create \
gem_ctx_exec \
+ gem_ctx_freq \
gem_ctx_isolation \
gem_ctx_param \
gem_ctx_switch \
diff --git a/tests/gem_ctx_freq.c b/tests/gem_ctx_freq.c
new file mode 100644
index 00000000..f7e79ac3
--- /dev/null
+++ b/tests/gem_ctx_freq.c
@@ -0,0 +1,604 @@
+/*
+ * 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 <unistd.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <time.h>
+
+#include "igt.h"
+#include "igt_perf.h"
+
+#define LOCAL_CONTEXT_PARAM_FREQUENCY 8
+
+#define SAMPLE_PERIOD (USEC_PER_SEC / 10)
+
+static int __set_freq(int fd, uint32_t ctx, uint32_t min, uint32_t max)
+{
+ struct drm_i915_gem_context_param param = {
+ .ctx_id = ctx,
+ .param = LOCAL_CONTEXT_PARAM_FREQUENCY,
+ .value = (uint64_t)max << 32 | min,
+ };
+
+ return __gem_context_set_param(fd, ¶m);
+}
+
+static void set_freq(int fd, uint32_t ctx, uint32_t min, uint32_t max)
+{
+ igt_assert_eq(__set_freq(fd, ctx, min, max), 0);
+}
+
+static void get_freq(int fd, uint32_t ctx, uint32_t *min, uint32_t *max)
+{
+ struct drm_i915_gem_context_param param = {
+ .ctx_id = ctx,
+ .param = LOCAL_CONTEXT_PARAM_FREQUENCY,
+ };
+
+ gem_context_get_param(fd, ¶m);
+
+ *min = param.value & 0xffffffff;
+ *max = param.value >> 32;
+}
+
+static double measure_frequency(int pmu, int period_us)
+{
+ uint64_t data[2];
+ uint64_t d_t, d_v;
+
+ igt_assert_eq(read(pmu, data, sizeof(data)), sizeof(data));
+ d_v = -data[0];
+ d_t = -data[1];
+
+ usleep(period_us);
+
+ igt_assert_eq(read(pmu, data, sizeof(data)), sizeof(data));
+ d_v += data[0];
+ d_t += data[1];
+
+ return d_v * 1e9 / d_t;
+}
+
+static void single(int fd, const struct intel_execution_engine *e)
+{
+ const unsigned int engine = e->exec_id | e->flags;
+ uint32_t ctx = gem_context_create(fd);
+ uint32_t min, max;
+ double measured;
+ igt_spin_t *spin;
+ int pmu;
+
+ get_freq(fd, ctx, &min, &max);
+ igt_info("Min freq: %dMHz; Max freq: %dMHz\n", min, max);
+
+ pmu = perf_i915_open(I915_PMU_REQUESTED_FREQUENCY);
+ igt_require(pmu >= 0);
+
+ for (uint32_t freq = min + 50; freq <= max; freq += 100) {
+ uint32_t cur, discard;
+
+ set_freq(fd, ctx, freq, freq);
+ get_freq(fd, ctx, &cur, &discard);
+
+ gem_quiescent_gpu(fd);
+ spin = __igt_spin_batch_new(fd, ctx, engine, 0);
+ usleep(10000);
+
+ measured = measure_frequency(pmu, SAMPLE_PERIOD);
+ igt_debugfs_dump(fd, "i915_rps_boost_info");
+
+ igt_spin_batch_free(fd, spin);
+ igt_info("%s(single): Measured %.1fMHz, expected %dMhz\n",
+ e->name, measured, cur);
+ igt_assert(measured > cur - 100 && measured < cur + 100);
+ }
+ gem_quiescent_gpu(fd);
+
+ close(pmu);
+ gem_context_destroy(fd, ctx);
+}
+
+static void continuous(int fd, const struct intel_execution_engine *e)
+{
+ const unsigned int engine = e->exec_id | e->flags;
+ uint32_t ctx = gem_context_create(fd);
+ uint32_t min, max;
+ double measured;
+ igt_spin_t *spin;
+ int pmu;
+
+ get_freq(fd, ctx, &min, &max);
+ igt_info("Min freq: %dMHz; Max freq: %dMHz\n", min, max);
+
+ pmu = perf_i915_open(I915_PMU_REQUESTED_FREQUENCY);
+ igt_require(pmu >= 0);
+
+ gem_quiescent_gpu(fd);
+ spin = __igt_spin_batch_new(fd, ctx, engine, 0);
+ for (uint32_t freq = min + 50; freq <= max; freq += 100) {
+ uint32_t cur, discard;
+ igt_spin_t *kick;
+
+ set_freq(fd, ctx, freq, freq);
+ get_freq(fd, ctx, &cur, &discard);
+
+ /*
+ * When requesting a new frequency on the currently
+ * executing context, it does not take effect until the
+ * next context switch. In this case, we trigger a lite
+ * restore.
+ */
+ kick = __igt_spin_batch_new(fd, ctx, engine, 0);
+ igt_spin_batch_free(fd, spin);
+ spin = kick;
+
+ usleep(10000);
+
+ measured = measure_frequency(pmu, SAMPLE_PERIOD);
+ igt_debugfs_dump(fd, "i915_rps_boost_info");
+
+ igt_info("%s(continuous): Measured %.1fMHz, expected %dMhz\n",
+ e->name, measured, cur);
+ igt_assert(measured > cur - 100 && measured < cur + 100);
+ }
+ igt_spin_batch_free(fd, spin);
+ gem_quiescent_gpu(fd);
+
+ close(pmu);
+ gem_context_destroy(fd, ctx);
+}
+
+static void inflight(int fd, const struct intel_execution_engine *e)
+{
+ const unsigned int engine = e->exec_id | e->flags;
+ uint32_t ctx, min, max, freq, discard;
+ double measured;
+ igt_spin_t *plug, *work[2];
+ int pmu;
+
+ pmu = perf_i915_open(I915_PMU_REQUESTED_FREQUENCY);
+ igt_require(pmu >= 0);
+
+ ctx = gem_context_create(fd);
+ get_freq(fd, ctx, &min, &max);
+ set_freq(fd, ctx, min, min);
+
+ igt_info("Min freq: %dMHz; Max freq: %dMHz\n", min, max);
+
+ gem_quiescent_gpu(fd);
+ plug = igt_spin_batch_new(fd, ctx, engine, 0);
+ gem_context_destroy(fd, ctx);
+ for (int n = 0; n < 16; n++) {
+ struct drm_i915_gem_exec_object2 obj = {
+ .handle = plug->handle,
+ };
+ struct drm_i915_gem_execbuffer2 eb = {
+ .buffer_count = 1,
+ .buffers_ptr = to_user_pointer(&obj),
+ .flags = engine,
+ .rsvd1 = gem_context_create(fd),
+ };
+ set_freq(fd, eb.rsvd1, min, min);
+ gem_execbuf(fd, &eb);
+ gem_context_destroy(fd, eb.rsvd1);
+ }
+ measured = measure_frequency(pmu, SAMPLE_PERIOD);
+ igt_debugfs_dump(fd, "i915_rps_boost_info");
+ igt_info("%s(plug): Measured %.1fMHz, expected %dMhz\n",
+ e->name, measured, min);
+ igt_assert(measured > min - 100 && measured < min + 100);
+
+ ctx = gem_context_create(fd);
+ set_freq(fd, ctx, max, max);
+ work[0] = __igt_spin_batch_new(fd, ctx, engine, 0);
+
+ /* work is now queued but not executing */
+ freq = (max + min) / 2;
+ set_freq(fd, ctx, freq, freq);
+ get_freq(fd, ctx, &freq, &discard);
+ gem_context_destroy(fd, ctx);
+
+ ctx = gem_context_create(fd);
+ set_freq(fd, ctx, max, max);
+ work[1] = __igt_spin_batch_new(fd, ctx, engine, 0);
+ gem_context_destroy(fd, ctx);
+
+ igt_spin_batch_end(plug);
+ do
+ usleep(10000);
+ while (gem_bo_busy(fd, plug->handle));
+ igt_spin_batch_free(fd, plug);
+
+ /* Now work will execute */
+ measured = measure_frequency(pmu, SAMPLE_PERIOD);
+ igt_debugfs_dump(fd, "i915_engine_info");
+ igt_debugfs_dump(fd, "i915_rps_boost_info");
+ igt_info("%s(work0): Measured %.1fMHz, expected %dMhz\n",
+ e->name, measured, freq);
+ igt_assert(measured > freq - 100 && measured < freq + 100);
+
+ igt_spin_batch_end(work[0]);
+ do
+ usleep(10000);
+ while (gem_bo_busy(fd, work[0]->handle));
+ igt_spin_batch_free(fd, work[0]);
+
+ measured = measure_frequency(pmu, SAMPLE_PERIOD);
+ igt_debugfs_dump(fd, "i915_engine_info");
+ igt_debugfs_dump(fd, "i915_rps_boost_info");
+ igt_info("%s(work1): Measured %.1fMHz, expected %dMhz\n",
+ e->name, measured, max);
+ igt_assert(measured > max - 100 && measured < max + 100);
+
+ igt_spin_batch_free(fd, work[1]);
+ close(pmu);
+ gem_quiescent_gpu(fd);
+}
+
+static void sandwich(int fd)
+{
+ uint32_t ctx = gem_context_create(fd);
+ unsigned int engine;
+ uint32_t min, max;
+ igt_spin_t *spin;
+ int pmu;
+
+ pmu = perf_i915_open(I915_PMU_REQUESTED_FREQUENCY);
+ igt_require(pmu >= 0);
+
+ spin = igt_spin_batch_new(fd, ctx, 0, 0);
+ get_freq(fd, ctx, &min, &max);
+ set_freq(fd, ctx, min, min);
+ for_each_physical_engine(fd, engine) {
+ struct drm_i915_gem_exec_object2 obj = {
+ .handle = spin->handle,
+ };
+ struct drm_i915_gem_execbuffer2 eb = {
+ .buffer_count = 1,
+ .buffers_ptr = to_user_pointer(&obj),
+ .flags = engine,
+ .rsvd1 = ctx,
+ };
+ uint32_t cur, discard;
+ double measured;
+
+ min += 50;
+ if (min > max)
+ break;
+
+ set_freq(fd, ctx, min, min);
+ get_freq(fd, ctx, &cur, &discard);
+
+ gem_execbuf(fd, &eb);
+ usleep(10000);
+
+ measured = measure_frequency(pmu, SAMPLE_PERIOD);
+ igt_debugfs_dump(fd, "i915_rps_boost_info");
+
+ igt_info("Measured %.1fMHz, expected %dMhz\n", measured, cur);
+ igt_assert(measured > cur - 100 && measured < cur + 100);
+ }
+ igt_spin_batch_free(fd, spin);
+ gem_quiescent_gpu(fd);
+
+ gem_context_destroy(fd, ctx);
+ close(pmu);
+}
+
+static void pwm(int fd, unsigned int *engines, unsigned int nengine, int link)
+{
+ uint32_t ctx[nengine];
+
+ fcntl(link, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
+
+ for (unsigned int n = 0; n < nengine; n++)
+ ctx[n] = gem_context_create(fd);
+
+ do {
+ igt_spin_t *spin;
+ struct {
+ uint32_t engine;
+ uint32_t min;
+ uint32_t max;
+ } req;
+
+ while (read(link, &req, sizeof(req)) > 0) {
+ if ((req.engine | req.min | req.max) == 0)
+ goto out;
+
+ igt_assert(req.engine < nengine);
+ set_freq(fd, ctx[req.engine], req.min, req.max);
+ }
+
+ /* Create a 20% load using busy spinners */
+ spin = __igt_spin_batch_new(fd, ctx[0], engines[0], 0);
+ for (unsigned int n = 1; n < nengine; n++) {
+ struct drm_i915_gem_exec_object2 obj = {
+ .handle = spin->handle,
+ };
+ struct drm_i915_gem_execbuffer2 eb = {
+ .buffer_count = 1,
+ .buffers_ptr = to_user_pointer(&obj),
+ .flags = engines[n],
+ .rsvd1 = ctx[n],
+ };
+ gem_execbuf(fd, &eb);
+ }
+ usleep(100);
+ igt_spin_batch_end(spin);
+
+ do
+ usleep(10);
+ while (gem_bo_busy(fd, spin->handle));
+ igt_spin_batch_free(fd, spin);
+ usleep(400);
+ } while (1);
+
+out:
+ for (unsigned int n = 0; n < nengine; n++)
+ gem_context_destroy(fd, ctx[n]);
+}
+
+static void smoketest(int fd, int timeout)
+{
+ unsigned int engines[16];
+ unsigned int nengine;
+ unsigned int engine;
+ uint32_t min[16], max[16];
+ int pmu, link[2];
+
+ get_freq(fd, 0, &min[0], &max[0]);
+
+ nengine = 0;
+ for_each_physical_engine(fd, engine) {
+ if (nengine == ARRAY_SIZE(engines) - 1)
+ break;
+
+ min[nengine] = min[0];
+ max[nengine] = max[0];
+ engines[nengine] = engine;
+ nengine++;
+ }
+ igt_require(nengine);
+
+ igt_assert(pipe(link) == 0);
+ igt_fork(child, 1)
+ pwm(fd, engines, nengine, link[0]);
+ close(link[0]);
+
+ pmu = perf_i915_open(I915_PMU_REQUESTED_FREQUENCY);
+ igt_require(pmu >= 0);
+
+ igt_until_timeout(timeout) {
+ struct {
+ uint32_t engine;
+ uint32_t min;
+ uint32_t max;
+ } req;
+ double measured;
+ uint32_t ctx;
+
+ req.engine = rand() % nengine;
+
+ ctx = gem_context_create(fd);
+ get_freq(fd, ctx, &req.min, &req.max);
+ req.min = rand() % (req.max - req.min) + req.min;
+ req.max = rand() % (req.max - req.min) + req.min;
+ set_freq(fd, ctx, req.min, req.max);
+ get_freq(fd, ctx, &req.min, &req.max);
+
+ igt_debug("Replacing (%d, %d) on engine %x with (%d, %d)\n",
+ min[req.engine], max[req.engine], req.engine,
+ req.min, req.max);
+ igt_assert(write(link[1], &req, sizeof(req)) == sizeof(req));
+ gem_context_destroy(fd, ctx);
+
+ min[req.engine] = req.min;
+ max[req.engine] = req.max;
+
+ for (unsigned int n = 0; n < nengine; n++) {
+ igt_debug("[%d]: [%d, %d]\n", n, min[n], max[n]);
+ if (min[n] < req.min)
+ req.min = min[n];
+ if (max[n] > req.max)
+ req.max = max[n];
+ }
+ igt_assert(req.max >= req.min);
+
+ usleep(50000);
+ measured = measure_frequency(pmu, SAMPLE_PERIOD);
+
+ if (measured <= req.min - 100 || measured >= req.max + 100)
+ igt_debugfs_dump(fd, "i915_rps_boost_info");
+ igt_info("Measured %.1fMHz, expected [%d, %d]Mhz\n",
+ measured, req.min, req.max);
+ igt_assert(measured > req.min - 100 &&
+ measured < req.max + 100);
+ }
+
+ do {
+ struct {
+ uint32_t engine;
+ uint32_t min;
+ uint32_t max;
+ } req = {};
+
+ write(link[1], &req, sizeof(req));
+ close(link[1]);
+ } while (0);
+ igt_waitchildren();
+ gem_quiescent_gpu(fd);
+
+ close(pmu);
+}
+
+static void invalid_param(int fd)
+{
+ uint32_t min, max;
+ uint32_t cur_min, cur_max;
+
+ get_freq(fd, 0, &min, &max);
+
+ igt_assert_eq(__set_freq(fd, 0, min - 50, max), -EINVAL);
+ igt_assert_eq(__set_freq(fd, 0, min, max + 50), -EINVAL);
+ igt_assert_eq(__set_freq(fd, 0, min + 50, min), -EINVAL);
+ igt_assert_eq(__set_freq(fd, 0, max, max - 50), -EINVAL);
+
+ get_freq(fd, 0, &cur_min, &cur_max);
+ igt_assert_eq(cur_min, min);
+ igt_assert_eq(cur_max, max);
+}
+
+static void idempotent(int fd)
+{
+ uint32_t min, max;
+ uint32_t cur_min, cur_max;
+
+ get_freq(fd, 0, &min, &max);
+
+ set_freq(fd, 0, max, max);
+ get_freq(fd, 0, &cur_min, &cur_max);
+ igt_assert_eq(cur_min, max);
+ igt_assert_eq(cur_max, max);
+
+ set_freq(fd, 0, min, min);
+ get_freq(fd, 0, &cur_min, &cur_max);
+ igt_assert_eq(cur_min, min);
+ igt_assert_eq(cur_max, min);
+
+ set_freq(fd, 0, min, max);
+ get_freq(fd, 0, &cur_min, &cur_max);
+ igt_assert_eq(cur_min, min);
+ igt_assert_eq(cur_max, max);
+}
+
+static void independent(int fd)
+{
+ uint32_t min, max;
+ uint32_t cur_min, cur_max;
+ uint32_t ctx[2];
+
+ get_freq(fd, 0, &min, &max);
+
+ set_freq(fd, 0, max, max);
+ ctx[0] = gem_context_create(fd);
+ get_freq(fd, ctx[0], &cur_min, &cur_max);
+ igt_assert_eq(cur_min, min);
+ igt_assert_eq(cur_max, max);
+
+ set_freq(fd, 0, min, min);
+ get_freq(fd, ctx[0], &cur_min, &cur_max);
+ igt_assert_eq(cur_min, min);
+ igt_assert_eq(cur_max, max);
+
+ ctx[1] = gem_context_create(fd);
+ get_freq(fd, ctx[1], &cur_min, &cur_max);
+ igt_assert_eq(cur_min, min);
+ igt_assert_eq(cur_max, max);
+
+ set_freq(fd, ctx[1], max, max);
+ get_freq(fd, ctx[0], &cur_min, &cur_max);
+ igt_assert_eq(cur_min, min);
+ igt_assert_eq(cur_max, max);
+
+ get_freq(fd, 0, &cur_min, &cur_max);
+ igt_assert_eq(cur_min, min);
+ igt_assert_eq(cur_max, min);
+
+ get_freq(fd, ctx[1], &cur_min, &cur_max);
+ igt_assert_eq(cur_min, max);
+ igt_assert_eq(cur_max, max);
+ gem_context_destroy(fd, ctx[1]);
+
+ get_freq(fd, ctx[0], &cur_min, &cur_max);
+ igt_assert_eq(cur_min, min);
+ igt_assert_eq(cur_max, max);
+ gem_context_destroy(fd, ctx[0]);
+}
+
+static bool has_ctx_freq(int fd)
+{
+ struct drm_i915_gem_context_param param = {
+ .param = LOCAL_CONTEXT_PARAM_FREQUENCY,
+ };
+
+ return __gem_context_get_param(fd, ¶m) == 0;
+}
+
+igt_main
+{
+ const struct intel_execution_engine *e;
+ int fd = -1;
+
+ igt_fixture {
+ fd = drm_open_driver(DRIVER_INTEL);
+ igt_require_gem(fd);
+
+ igt_require(has_ctx_freq(fd));
+ }
+
+ igt_subtest("invalid")
+ invalid_param(fd);
+
+ igt_subtest("idempotent")
+ idempotent(fd);
+
+ igt_subtest("independent")
+ independent(fd);
+
+ igt_skip_on_simulation();
+
+ for (e = intel_execution_engines; e->name; e++) {
+ if (e->exec_id == 0)
+ continue;
+
+ igt_subtest_group {
+ igt_fixture {
+ igt_require(gem_ring_has_physical_engine(fd, e->exec_id | e->flags));
+ }
+
+ igt_subtest_f("%s-single", e->name)
+ single(fd, e);
+ igt_subtest_f("%s-continuous", e->name)
+ continuous(fd, e);
+ igt_subtest_f("%s-inflight", e->name)
+ inflight(fd, e);
+ }
+ }
+
+ igt_subtest("sandwich")
+ sandwich(fd);
+
+ igt_subtest("smoketest")
+ smoketest(fd, 20);
+}
diff --git a/tests/meson.build b/tests/meson.build
index 58729231..f1271274 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -35,6 +35,7 @@ test_progs = [
'gem_ctx_bad_exec',
'gem_ctx_create',
'gem_ctx_exec',
+ 'gem_ctx_freq',
'gem_ctx_param',
'gem_ctx_switch',
'gem_ctx_thrash',
--
2.16.2
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