From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7A806C433E0 for ; Thu, 2 Jul 2020 05:49:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 54287207E8 for ; Thu, 2 Jul 2020 05:49:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="B2sAk4Hh" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726089AbgGBFtM (ORCPT ); Thu, 2 Jul 2020 01:49:12 -0400 Received: from us-smtp-1.mimecast.com ([207.211.31.81]:56956 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725263AbgGBFtM (ORCPT ); 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Thu, 2 Jul 2020 05:49:05 +0000 (UTC) Received: from kamzik.brq.redhat.com (unknown [10.40.192.87]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 43AAA60CD3; Thu, 2 Jul 2020 05:49:00 +0000 (UTC) Date: Thu, 2 Jul 2020 07:48:57 +0200 From: Andrew Jones To: Jingyi Wang Cc: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, maz@kernel.org, wanghaibin.wang@huawei.com, yuzenghui@huawei.com, eric.auger@redhat.com Subject: Re: [kvm-unit-tests PATCH v2 7/8] arm64: microbench: Add time limit for each individual test Message-ID: <20200702054857.qcmaaproewgzzljf@kamzik.brq.redhat.com> References: <20200702030132.20252-1-wangjingyi11@huawei.com> <20200702030132.20252-8-wangjingyi11@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200702030132.20252-8-wangjingyi11@huawei.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Thu, Jul 02, 2020 at 11:01:31AM +0800, Jingyi Wang wrote: > Besides using separate running times parameter, we add time limit > for loop_test to make sure each test should be done in a certain > time(5 sec here). > > Signed-off-by: Jingyi Wang > --- > arm/micro-bench.c | 17 +++++++++++------ > 1 file changed, 11 insertions(+), 6 deletions(-) > > diff --git a/arm/micro-bench.c b/arm/micro-bench.c > index 506d2f9..4c962b7 100644 > --- a/arm/micro-bench.c > +++ b/arm/micro-bench.c > @@ -23,6 +23,7 @@ > #include > > #define NTIMES (1U << 16) > +#define MAX_NS (5 * 1000 * 1000 * 1000UL) How about naming this something like "NS_5_SECONDS"? > > static u32 cntfrq; > > @@ -258,22 +259,26 @@ static void loop_test(struct exit_test *test) > uint64_t start, end, total_ticks, ntimes = 0; > struct ns_time total_ns, avg_ns; > > + total_ticks = 0; > if (test->prep) { > if(!test->prep()) { > printf("%s test skipped\n", test->name); > return; > } > } > - isb(); > - start = read_sysreg(cntpct_el0); > - while (ntimes < test->times) { > + > + while (ntimes < test->times && total_ns.ns < MAX_NS) { > + isb(); > + start = read_sysreg(cntpct_el0); > test->exec(); > + isb(); > + end = read_sysreg(cntpct_el0); > + > ntimes++; > + total_ticks += (end - start); > + ticks_to_ns_time(total_ticks, &total_ns); > } > - isb(); > - end = read_sysreg(cntpct_el0); > > - total_ticks = end - start; > ticks_to_ns_time(total_ticks, &total_ns); > avg_ns.ns = total_ns.ns / ntimes; > avg_ns.ns_frac = total_ns.ns_frac / ntimes; > -- > 2.19.1 > > Thanks, drew From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 78329C433E0 for ; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu On Thu, Jul 02, 2020 at 11:01:31AM +0800, Jingyi Wang wrote: > Besides using separate running times parameter, we add time limit > for loop_test to make sure each test should be done in a certain > time(5 sec here). > > Signed-off-by: Jingyi Wang > --- > arm/micro-bench.c | 17 +++++++++++------ > 1 file changed, 11 insertions(+), 6 deletions(-) > > diff --git a/arm/micro-bench.c b/arm/micro-bench.c > index 506d2f9..4c962b7 100644 > --- a/arm/micro-bench.c > +++ b/arm/micro-bench.c > @@ -23,6 +23,7 @@ > #include > > #define NTIMES (1U << 16) > +#define MAX_NS (5 * 1000 * 1000 * 1000UL) How about naming this something like "NS_5_SECONDS"? > > static u32 cntfrq; > > @@ -258,22 +259,26 @@ static void loop_test(struct exit_test *test) > uint64_t start, end, total_ticks, ntimes = 0; > struct ns_time total_ns, avg_ns; > > + total_ticks = 0; > if (test->prep) { > if(!test->prep()) { > printf("%s test skipped\n", test->name); > return; > } > } > - isb(); > - start = read_sysreg(cntpct_el0); > - while (ntimes < test->times) { > + > + while (ntimes < test->times && total_ns.ns < MAX_NS) { > + isb(); > + start = read_sysreg(cntpct_el0); > test->exec(); > + isb(); > + end = read_sysreg(cntpct_el0); > + > ntimes++; > + total_ticks += (end - start); > + ticks_to_ns_time(total_ticks, &total_ns); > } > - isb(); > - end = read_sysreg(cntpct_el0); > > - total_ticks = end - start; > ticks_to_ns_time(total_ticks, &total_ns); > avg_ns.ns = total_ns.ns / ntimes; > avg_ns.ns_frac = total_ns.ns_frac / ntimes; > -- > 2.19.1 > > Thanks, drew _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm