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drm/i915/selftests: Exercise concurrent submission to all engines

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The simplest and most maximal submission we can do, a thread to submit
requests unto each engine.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190925193446.26007-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-09-25 20:34:46 +01:00
parent 74b2089a10
commit a3f56e7da5
1 changed files with 125 additions and 0 deletions
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125
drivers/gpu/drm/i915/selftests/i915_request.c
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@ -1062,6 +1062,130 @@ out_unlock:
return err;
}
static int __live_parallel_engine1(void *arg)
{
struct intel_engine_cs *engine = arg;
IGT_TIMEOUT(end_time);
unsigned long count;
count = 0;
do {
struct i915_request *rq;
int err;
mutex_lock(&engine->i915->drm.struct_mutex);
rq = i915_request_create(engine->kernel_context);
if (IS_ERR(rq)) {
mutex_unlock(&engine->i915->drm.struct_mutex);
return PTR_ERR(rq);
}
i915_request_get(rq);
i915_request_add(rq);
mutex_unlock(&engine->i915->drm.struct_mutex);
err = 0;
if (i915_request_wait(rq, 0, HZ / 5) < 0)
err = -ETIME;
i915_request_put(rq);
if (err)
return err;
count++;
} while (!__igt_timeout(end_time, NULL));
pr_info("%s: %lu request + sync\n", engine->name, count);
return 0;
}
static int __live_parallel_engineN(void *arg)
{
struct intel_engine_cs *engine = arg;
IGT_TIMEOUT(end_time);
unsigned long count;
count = 0;
do {
struct i915_request *rq;
mutex_lock(&engine->i915->drm.struct_mutex);
rq = i915_request_create(engine->kernel_context);
if (IS_ERR(rq)) {
mutex_unlock(&engine->i915->drm.struct_mutex);
return PTR_ERR(rq);
}
i915_request_add(rq);
mutex_unlock(&engine->i915->drm.struct_mutex);
count++;
} while (!__igt_timeout(end_time, NULL));
pr_info("%s: %lu requests\n", engine->name, count);
return 0;
}
static int live_parallel_engines(void *arg)
{
struct drm_i915_private *i915 = arg;
static int (* const func[])(void *arg) = {
__live_parallel_engine1,
__live_parallel_engineN,
NULL,
};
struct intel_engine_cs *engine;
enum intel_engine_id id;
int (* const *fn)(void *arg);
int err = 0;
/*
* Check we can submit requests to all engines concurrently. This
* tests that we load up the system maximally.
*/
for (fn = func; !err && *fn; fn++) {
struct task_struct *tsk[I915_NUM_ENGINES] = {};
struct igt_live_test t;
mutex_lock(&i915->drm.struct_mutex);
err = igt_live_test_begin(&t, i915, __func__, "");
mutex_unlock(&i915->drm.struct_mutex);
if (err)
break;
for_each_engine(engine, i915, id) {
tsk[id] = kthread_run(*fn, engine,
"igt/parallel:%s",
engine->name);
if (IS_ERR(tsk[id])) {
err = PTR_ERR(tsk[id]);
break;
}
get_task_struct(tsk[id]);
}
for_each_engine(engine, i915, id) {
int status;
if (IS_ERR_OR_NULL(tsk[id]))
continue;
status = kthread_stop(tsk[id]);
if (status && !err)
err = status;
put_task_struct(tsk[id]);
}
mutex_lock(&i915->drm.struct_mutex);
if (igt_live_test_end(&t))
err = -EIO;
mutex_unlock(&i915->drm.struct_mutex);
}
return err;
}
static int
max_batches(struct i915_gem_context *ctx, struct intel_engine_cs *engine)
{
@ -1240,6 +1364,7 @@ int i915_request_live_selftests(struct drm_i915_private *i915)
SUBTEST(live_nop_request),
SUBTEST(live_all_engines),
SUBTEST(live_sequential_engines),
SUBTEST(live_parallel_engines),
SUBTEST(live_empty_request),
SUBTEST(live_breadcrumbs_smoketest),
};