From patchwork Fri Sep 21 08:11:22 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 10609251 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9266814BD for ; Fri, 21 Sep 2018 08:11:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 849A42D617 for ; Fri, 21 Sep 2018 08:11:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 786972D623; Fri, 21 Sep 2018 08:11:40 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id BBBD52D617 for ; Fri, 21 Sep 2018 08:11:39 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 28F876E70A; Fri, 21 Sep 2018 08:11:39 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from fireflyinternet.com (mail.fireflyinternet.com [109.228.58.192]) by gabe.freedesktop.org (Postfix) with ESMTPS id AA0766E70A for ; Fri, 21 Sep 2018 08:11:37 +0000 (UTC) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.65.138; Received: from haswell.alporthouse.com (unverified [78.156.65.138]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP id 13844168-1500050 for multiple; Fri, 21 Sep 2018 09:11:22 +0100 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Fri, 21 Sep 2018 09:11:22 +0100 Message-Id: <20180921081122.2206-1-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.19.0 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH] drm/i915/selftests: Smoketest preemption X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP Very light stress test to bombard the submission backends with a large stream with requests of randomly assigned priorities. Preemption will be occasionally requested, but never succeed! Signed-off-by: Chris Wilson Cc: Michał Winiarski Cc: Tvrtko Ursulin --- drivers/gpu/drm/i915/selftests/intel_lrc.c | 83 ++++++++++++++++++++++ 1 file changed, 83 insertions(+) diff --git a/drivers/gpu/drm/i915/selftests/intel_lrc.c b/drivers/gpu/drm/i915/selftests/intel_lrc.c index 1aea7a8f2224..8c8e6a8f7d52 100644 --- a/drivers/gpu/drm/i915/selftests/intel_lrc.c +++ b/drivers/gpu/drm/i915/selftests/intel_lrc.c @@ -6,6 +6,7 @@ #include "../i915_selftest.h" #include "igt_flush_test.h" +#include "i915_random.h" #include "mock_context.h" @@ -573,6 +574,87 @@ static int live_preempt_hang(void *arg) return err; } +static int random_range(struct rnd_state *rnd, int min, int max) +{ + return i915_prandom_u32_max_state(max - min, rnd) + min; +} + +static int random_priority(struct rnd_state *rnd) +{ + return random_range(rnd, I915_PRIORITY_MIN, I915_PRIORITY_MAX); +} + +static int live_preempt_smoke(void *arg) +{ +#define NCTX 1024 + struct drm_i915_private *i915 = arg; + struct i915_gem_context **contexts; + struct intel_engine_cs *engine; + enum intel_engine_id id; + IGT_TIMEOUT(end_time); + I915_RND_STATE(prng); + unsigned long count; + int err = -ENOMEM; + int n; + + if (!HAS_LOGICAL_RING_PREEMPTION(i915)) + return 0; + + contexts = kmalloc_array(NCTX, sizeof(*contexts), GFP_KERNEL); + if (!contexts) + return -ENOMEM; + + mutex_lock(&i915->drm.struct_mutex); + intel_runtime_pm_get(i915); + + for (n = 0; n < NCTX; n++) { + contexts[n] = kernel_context(i915); + if (!contexts[n]) + goto err_ctx; + } + + count = 0; + do { + for_each_engine(engine, i915, id) { + struct i915_gem_context *ctx = + contexts[i915_prandom_u32_max_state(NCTX, + &prng)]; + struct i915_request *rq; + + ctx->sched.priority = random_priority(&prng); + + rq = i915_request_alloc(engine, ctx); + if (IS_ERR(rq)) { + err = PTR_ERR(rq); + goto err_ctx; + } + + i915_request_add(rq); + count++; + } + } while (!__igt_timeout(end_time, NULL)); + + pr_info("Submitted %lu requests across %d engines and %d contexts\n", + count, INTEL_INFO(i915)->num_rings, NCTX); + + err = 0; +err_ctx: + if (igt_flush_test(i915, I915_WAIT_LOCKED)) + err = -EIO; + + for (n = 0; n < NCTX; n++) { + if (!contexts[n]) + break; + kernel_context_close(contexts[n]); + } + + intel_runtime_pm_put(i915); + mutex_unlock(&i915->drm.struct_mutex); + kfree(contexts); + return err; +#undef NCTX +} + int intel_execlists_live_selftests(struct drm_i915_private *i915) { static const struct i915_subtest tests[] = { @@ -580,6 +662,7 @@ int intel_execlists_live_selftests(struct drm_i915_private *i915) SUBTEST(live_preempt), SUBTEST(live_late_preempt), SUBTEST(live_preempt_hang), + SUBTEST(live_preempt_smoke), }; if (!HAS_EXECLISTS(i915))