From patchwork Fri Oct 14 17:35:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Ani Sinha X-Patchwork-Id: 13007228 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9353FC433FE for ; Fri, 14 Oct 2022 17:41:39 +0000 (UTC) Received: from localhost ([::1]:60904 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ojOgk-00070w-IW for qemu-devel@archiver.kernel.org; Fri, 14 Oct 2022 13:41:38 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49300) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ojObY-0002i4-VE for qemu-devel@nongnu.org; Fri, 14 Oct 2022 13:36:16 -0400 Received: from mail-pl1-x62b.google.com ([2607:f8b0:4864:20::62b]:39812) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1ojObW-000837-SU for qemu-devel@nongnu.org; Fri, 14 Oct 2022 13:36:16 -0400 Received: by mail-pl1-x62b.google.com with SMTP id f23so5381400plr.6 for ; Fri, 14 Oct 2022 10:36:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=anisinha-ca.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=jmWzXLUEgkSQk0CtRC65Qy9q7k6vgCayAbWoRpw6RB8=; b=2yAjPR5J42jIarRbpVZlozhJ4k1Bb5mZDRfKQbPWOqQV8mu8NbRpwmdkUAUyfV4228 lJJb0lBV2NCgM5ZEMHsLR6VEL2DYuA21VK/C6glBV2TBMu69NHme3huSdkacvghrF+vJ Ee9Nkyo5nY593akfXgiXJnjL8grj0I8Uy9amMoDz3qq/rso8jng9TtNU6M4Ua55i/Ch3 xG4y+G4cBREAVzncRZmVWwp71uwLm4oHuyoTZFNPQCqbfNCUX+9K5szTexPGGiB5TrTk 1y0h6ODrADxWrfRp2VidRl/paE2izWYJw1Obr0hCpcmqYe1AwKBLV7IX/WkeBKG09Abe 2xUQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=jmWzXLUEgkSQk0CtRC65Qy9q7k6vgCayAbWoRpw6RB8=; b=PPWy7EnliNNrj0YZh+x706TvP/EQ84altBFPuzZki66vxsjSmkPJ1FS5EpVrtnL+Ju TbWpuC37DjePpPr4BYVV5+amz0LBylZCa43sUWwgkf7YFTXQEdzuAhQ44f9dZXlyho4R VeCBb6P6EZECyMx50tBIQdTV1mie25JFCX24e8uRXVW+VmezGbaQz6Cfg9JJWPJ1aHJS Fbds8vzpG8qY+2eBP5wP24Vg/LN2iy9DFbOmB3+D40/blfUpkSHMncQfnij7xYa5n2H0 7YRAV/d4sGiuW87F2ETR2Ew0ora8UFSHAETQwirFt6r3XMd+CycmNkyeWjrl8/E/UBMq PXFQ== X-Gm-Message-State: ACrzQf27LKWRAi+nz7uUEtU37BskePOjgr8x3+gQpsCWqi80IdvwKMoq bCXXixV/RtPmufY1HkOWcQbj1A== X-Google-Smtp-Source: AMsMyM6YMQTvqhcL/QWxAVS6ohmkNfafrRf62sp5ZKhg0KFR94F8i49nSvyTfB+G6lCPOOD9qJ5j4A== X-Received: by 2002:a17:90a:d913:b0:20d:9303:cfae with SMTP id c19-20020a17090ad91300b0020d9303cfaemr15555055pjv.69.1665768973398; Fri, 14 Oct 2022 10:36:13 -0700 (PDT) Received: from anisinha-lenovo.ba.nuagenetworks.net ([203.163.243.197]) by smtp.googlemail.com with ESMTPSA id t13-20020a1709027fcd00b0016d8d277c02sm2030042plb.25.2022.10.14.10.36.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 14 Oct 2022 10:36:13 -0700 (PDT) From: Ani Sinha To: Cleber Rosa , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Wainer dos Santos Moschetta , Beraldo Leal Cc: Ani Sinha , =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Paolo Bonzini , Maydell Peter , John Snow , Thomas Huth , =?utf-8?q?Alex_Benn=C3=A9e?= , Igor Mammedov , Michael Tsirkin , qemu-devel@nongnu.org Subject: [PATCH v4 04/10] acpi/tests/avocado/bits: add smilatency test suite from bits in order to disable it Date: Fri, 14 Oct 2022 23:05:02 +0530 Message-Id: <20221014173508.222823-5-ani@anisinha.ca> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221014173508.222823-1-ani@anisinha.ca> References: <20221014173508.222823-1-ani@anisinha.ca> MIME-Version: 1.0 Received-SPF: none client-ip=2607:f8b0:4864:20::62b; envelope-from=ani@anisinha.ca; helo=mail-pl1-x62b.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" smilatency tests does not reliably pass every time it is run from QEMU. This change adds the test file unchanged from bits so that the next change can disable the test. The test has an extension .py2 just like other tests so that they are excluded from loading by avocado framework. Cc: Daniel P. Berrangé Cc: Paolo Bonzini Cc: Maydell Peter Cc: John Snow Cc: Thomas Huth Cc: Alex Bennée Cc: Igor Mammedov Cc: Michael Tsirkin Signed-off-by: Ani Sinha --- .../acpi-bits/bits-tests/smilatency.py2 | 102 ++++++++++++++++++ 1 file changed, 102 insertions(+) create mode 100644 tests/avocado/acpi-bits/bits-tests/smilatency.py2 diff --git a/tests/avocado/acpi-bits/bits-tests/smilatency.py2 b/tests/avocado/acpi-bits/bits-tests/smilatency.py2 new file mode 100644 index 0000000000..fb1b7228e3 --- /dev/null +++ b/tests/avocado/acpi-bits/bits-tests/smilatency.py2 @@ -0,0 +1,102 @@ +# Copyright (c) 2015, Intel Corporation +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are met: +# +# * Redistributions of source code must retain the above copyright notice, +# this list of conditions and the following disclaimer. +# * Redistributions in binary form must reproduce the above copyright notice, +# this list of conditions and the following disclaimer in the documentation +# and/or other materials provided with the distribution. +# * Neither the name of Intel Corporation nor the names of its contributors +# may be used to endorse or promote products derived from this software +# without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR +# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON +# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +"""SMI latency test.""" + +import bits +from collections import namedtuple +import testsuite +import time +import usb + +def register_tests(): + testsuite.add_test("SMI latency test", smi_latency); + testsuite.add_test("SMI latency test with USB disabled via BIOS handoff", test_with_usb_disabled, runall=False); + +def smi_latency(): + MSR_SMI_COUNT = 0x34 + + print "Warning: touching the keyboard can affect the results of this test." + + tsc_per_sec = bits.tsc_per_sec() + tsc_per_usec = tsc_per_sec / (1000 * 1000) + bins = [long(tsc_per_usec * 10**i) for i in range(9)] + bin_descs = [ + "0 < t <= 1us", + "1us < t <= 10us", + "10us < t <= 100us", + "100us < t <= 1ms", + "1ms < t <= 10ms", + "10ms < t <= 100ms", + "100ms < t <= 1s ", + "1s < t <= 10s ", + "10s < t <= 100s ", + "100s < t ", + ] + + print "Starting test. Wait here, I will be back in 15 seconds." + (max_latency, smi_count_delta, bins) = bits.smi_latency(long(15 * tsc_per_sec), bins) + BinType = namedtuple('BinType', ("max", "total", "count", "times")) + bins = [BinType(*b) for b in bins] + + testsuite.test("SMI latency < 150us to minimize risk of OS timeouts", max_latency / tsc_per_usec <= 150) + if not testsuite.show_detail(): + return + + for bin, desc in zip(bins, bin_descs): + if bin.count == 0: + continue + testsuite.print_detail("{}; average = {}; count = {}".format(desc, bits.format_tsc(bin.total/bin.count), bin.count)) + deltas = (bits.format_tsc(t2 - t1) for t1,t2 in zip(bin.times, bin.times[1:])) + testsuite.print_detail(" Times between first few observations: {}".format(" ".join("{:>6}".format(delta) for delta in deltas))) + + if smi_count_delta is not None: + testsuite.print_detail("{} SMI detected using MSR_SMI_COUNT (MSR {:#x})".format(smi_count_delta, MSR_SMI_COUNT)) + + testsuite.print_detail("Summary of impact: observed maximum latency = {}".format(bits.format_tsc(max_latency))) + +def test_with_usb_disabled(): + if usb.handoff_to_os(): + smi_latency() + +def average_io_smi(port, value, count): + def f(): + tsc_start = bits.rdtsc() + bits.outb(port, value) + return bits.rdtsc() - tsc_start + counts = [f() for i in range(count)] + return sum(counts)/len(counts) + +def time_io_smi(port=0xb2, value=0, count=1000): + count_for_estimate = 10 + start = time.time() + average_io_smi(port, value, count_for_estimate) + avg10 = time.time() - start + estimate = avg10 * count/count_for_estimate + if estimate > 1: + print "Running test, estimated time: {}s".format(int(estimate)) + average = average_io_smi(port, value, count) + print "Average of {} SMIs (via outb, port={:#x}, value={:#x}): {}".format(count, port, value, bits.format_tsc(average))