From a3f56e7da5231c902925711940835b6716f63f73 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Wed, 25 Sep 2019 20:34:46 +0100 Subject: drm/i915/selftests: Exercise concurrent submission to all engines The simplest and most maximal submission we can do, a thread to submit requests unto each engine. Signed-off-by: Chris Wilson Cc: Mika Kuoppala Reviewed-by: Mika Kuoppala Link: https://patchwork.freedesktop.org/patch/msgid/20190925193446.26007-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/selftests/i915_request.c | 125 ++++++++++++++++++++++++++ 1 file changed, 125 insertions(+) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/selftests/i915_request.c b/drivers/gpu/drm/i915/selftests/i915_request.c index b3688543ed7d..57cd4180d06c 100644 --- a/drivers/gpu/drm/i915/selftests/i915_request.c +++ b/drivers/gpu/drm/i915/selftests/i915_request.c @@ -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), }; -- cgit v1.2.3