From patchwork Tue Dec 10 12:19:34 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 11282161 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AEE09138D for ; Tue, 10 Dec 2019 12:19:43 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 975B42077B for ; Tue, 10 Dec 2019 12:19:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 975B42077B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=chris-wilson.co.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1EF516E8C6; Tue, 10 Dec 2019 12:19:43 +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 59E716E8D4; Tue, 10 Dec 2019 12:19:41 +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 19526075-1500050 for multiple; Tue, 10 Dec 2019 12:19:34 +0000 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Tue, 10 Dec 2019 12:19:34 +0000 Message-Id: <20191210121934.3845438-1-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.24.0 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH i-g-t] i915/perf_pmu: Cap target number of interrupts X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: igt-dev@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Limit the maximum number of interrupts in order to avoid overburdening older CPUs and GPUs. Signed-off-by: Chris Wilson --- tests/perf_pmu.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/tests/perf_pmu.c b/tests/perf_pmu.c index 33fb4d653..e1bbf2410 100644 --- a/tests/perf_pmu.c +++ b/tests/perf_pmu.c @@ -1274,11 +1274,15 @@ static void cpu_hotplug(int gem_fd) assert_within_epsilon(val, ts[1] - ts[0], tolerance); } +static int target_num_interrupts(int i915) +{ + return min(gem_measure_ring_inflight(i915, I915_EXEC_DEFAULT, 0), 30); +} + static void test_interrupts(int gem_fd) { - const int target = - gem_measure_ring_inflight(gem_fd, I915_EXEC_DEFAULT, 0); + const int target = target_num_interrupts(gem_fd); const unsigned int test_duration_ms = 1000; igt_spin_t *spin[target]; struct pollfd pfd; @@ -1342,8 +1346,7 @@ test_interrupts(int gem_fd) static void test_interrupts_sync(int gem_fd) { - const int target = - gem_measure_ring_inflight(gem_fd, I915_EXEC_DEFAULT, 0); + const int target = target_num_interrupts(gem_fd); const unsigned int test_duration_ms = 1000; igt_spin_t *spin[target]; struct pollfd pfd;