From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [63.128.21.124]) by sourceware.org (Postfix) with ESMTP id A853C3836C55 for ; Wed, 16 Dec 2020 13:38:20 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org A853C3836C55 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-228-Er2YxPgkOz2VjkZwYy9fTw-1; Wed, 16 Dec 2020 08:38:18 -0500 X-MC-Unique: Er2YxPgkOz2VjkZwYy9fTw-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 40976800D62; Wed, 16 Dec 2020 13:38:17 +0000 (UTC) Received: from localhost (unknown [10.33.36.115]) by smtp.corp.redhat.com (Postfix) with ESMTP id DE97D5D71B; Wed, 16 Dec 2020 13:38:16 +0000 (UTC) Date: Wed, 16 Dec 2020 13:38:16 +0000 From: Jonathan Wakely To: libstdc++@gcc.gnu.org, gcc-patches@gcc.gnu.org Subject: [committed] libstdc++: Add performance test for atomic_flag [PR 46447] Message-ID: <20201216133816.GA1029052@redhat.com> MIME-Version: 1.0 X-Clacks-Overhead: GNU Terry Pratchett X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: multipart/mixed; boundary="oyUTqETQ0mS9luUI" Content-Disposition: inline X-Spam-Status: No, score=-14.0 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H4, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=unavailable autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: libstdc++@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libstdc++ mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Dec 2020 13:38:22 -0000 --oyUTqETQ0mS9luUI Content-Type: text/plain; charset=us-ascii Content-Disposition: inline This adds a test to compare the performance of std::atomic_flag with similar operations on std::atomic_uchar and std::atomic_int. libstdc++-v3/ChangeLog: PR libstdc++/46447 * testsuite/performance/29_atomics/atomic_flag.cc: New test. Tested powerpc64le-linux. Committed to trunk. --oyUTqETQ0mS9luUI Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="patch.txt" commit 3cee0c6562e5d8df69a9d6ad613a6f3edcfcc797 Author: Jonathan Wakely Date: Wed Dec 16 11:51:42 2020 libstdc++: Add performance test for atomic_flag [PR 46447] This adds a test to compare the performance of std::atomic_flag with similar operations on std::atomic_uchar and std::atomic_int. libstdc++-v3/ChangeLog: PR libstdc++/46447 * testsuite/performance/29_atomics/atomic_flag.cc: New test. diff --git a/libstdc++-v3/testsuite/performance/29_atomics/atomic_flag.cc b/libstdc++-v3/testsuite/performance/29_atomics/atomic_flag.cc new file mode 100644 index 00000000000..af1a269a0e0 --- /dev/null +++ b/libstdc++-v3/testsuite/performance/29_atomics/atomic_flag.cc @@ -0,0 +1,71 @@ +// Copyright (C) 2009-2020 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 3, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING3. If not see +// . + + +#include +#include + +volatile std::atomic_flag af; +volatile std::atomic_uchar ac; +volatile std::atomic_int ai; + +int main() +{ + using namespace __gnu_test; + time_counter time; + resource_counter resource; + + const int n = 100000000; + + start_counters(time, resource); + for (int i = 0; i < n; ++i) + af.test_and_set(); + stop_counters(time, resource); + report_performance(__FILE__, "atomic_flag::test_and_set()", time, resource); + + start_counters(time, resource); + for (int i = 0; i < n; ++i) + af.clear(); + stop_counters(time, resource); + report_performance(__FILE__, "atomic_flag::clear()", time, resource); + + start_counters(time, resource); + for (int i = 0; i < n; ++i) + ac |= 1; + stop_counters(time, resource); + report_performance(__FILE__, "atomic_uchar::operator|=(1)", time, resource); + + start_counters(time, resource); + for (int i = 0; i < n; ++i) + ac = 0; + stop_counters(time, resource); + report_performance(__FILE__, "atomic_flag::operator=(0)", time, resource); + + start_counters(time, resource); + for (int i = 0; i < n; ++i) + ai |= 1; + stop_counters(time, resource); + report_performance(__FILE__, "atomic_int::operator|=(1)", time, resource); + + start_counters(time, resource); + for (int i = 0; i < n; ++i) + ai = 0; + stop_counters(time, resource); + report_performance(__FILE__, "atomic_int::operator=(0)", time, resource); + + return 0; +} --oyUTqETQ0mS9luUI--