From patchwork Mon Feb 22 16:32:44 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 8380201 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id D356DC0553 for ; Mon, 22 Feb 2016 16:52:05 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 408D5201CE for ; Mon, 22 Feb 2016 16:52:05 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8D721201BC for ; Mon, 22 Feb 2016 16:52:04 +0000 (UTC) Received: from localhost ([::1]:50245 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aXtiO-0004En-2E for patchwork-qemu-devel@patchwork.kernel.org; Mon, 22 Feb 2016 11:52:04 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57133) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aXtQO-0006mh-Iw for qemu-devel@nongnu.org; Mon, 22 Feb 2016 11:33:29 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aXtQN-0004kf-6h for qemu-devel@nongnu.org; Mon, 22 Feb 2016 11:33:28 -0500 Received: from mx1.redhat.com ([209.132.183.28]:35685) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aXtQJ-0004iO-83; Mon, 22 Feb 2016 11:33:23 -0500 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (Postfix) with ESMTPS id DAE6E627E9; Mon, 22 Feb 2016 16:33:22 +0000 (UTC) Received: from noname.str.redhat.com. (dhcp-192-197.str.redhat.com [10.33.192.197]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u1MGWs1o024155; Mon, 22 Feb 2016 11:33:22 -0500 From: Kevin Wolf To: qemu-block@nongnu.org Date: Mon, 22 Feb 2016 17:32:44 +0100 Message-Id: <1456158772-9344-27-git-send-email-kwolf@redhat.com> In-Reply-To: <1456158772-9344-1-git-send-email-kwolf@redhat.com> References: <1456158772-9344-1-git-send-email-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Mon, 22 Feb 2016 16:33:22 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Cc: kwolf@redhat.com, qemu-devel@nongnu.org Subject: [Qemu-devel] [PULL 26/34] throttle: Test throttle_compute_wait() during bursts X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Alberto Garcia This test simulates an I/O burst for more than two seconds and checks that it works as expected. Signed-off-by: Alberto Garcia Reviewed-by: Stefan Hajnoczi Signed-off-by: Kevin Wolf --- tests/test-throttle.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/tests/test-throttle.c b/tests/test-throttle.c index 145ba08..59675fa 100644 --- a/tests/test-throttle.c +++ b/tests/test-throttle.c @@ -80,6 +80,7 @@ static void test_leak_bucket(void) static void test_compute_wait(void) { + unsigned i; int64_t wait; int64_t result; @@ -115,6 +116,27 @@ static void test_compute_wait(void) /* time required to do half an operation */ result = (int64_t) NANOSECONDS_PER_SECOND / 150 / 2; g_assert(wait == result); + + /* Perform I/O for 2.2 seconds at a rate of bkt.max */ + bkt.burst_length = 2; + bkt.level = 0; + bkt.avg = 10; + bkt.max = 200; + for (i = 0; i < 22; i++) { + double units = bkt.max / 10; + bkt.level += units; + bkt.burst_level += units; + throttle_leak_bucket(&bkt, NANOSECONDS_PER_SECOND / 10); + wait = throttle_compute_wait(&bkt); + g_assert(double_cmp(bkt.burst_level, 0)); + g_assert(double_cmp(bkt.level, (i + 1) * (bkt.max - bkt.avg) / 10)); + /* We can do bursts for the 2 seconds we have configured in + * burst_length. We have 100 extra miliseconds of burst + * because bkt.level has been leaking during this time. + * After that, we have to wait. */ + result = i < 21 ? 0 : 1.8 * NANOSECONDS_PER_SECOND; + g_assert(wait == result); + } } /* functions to test ThrottleState initialization/destroy methods */