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 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 57969C5AD49 for ; Wed, 28 May 2025 10:11:05 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uKDga-0005ev-Mr; Wed, 28 May 2025 06:07:01 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uKDgL-0004bE-FB for qemu-devel@nongnu.org; Wed, 28 May 2025 06:06:45 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uKDgB-0007Ib-0z for qemu-devel@nongnu.org; Wed, 28 May 2025 06:06:42 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1748426793; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=hVA012VkzcvdoDUkAdfR2+pJ3HkG0N8iDqVKF3jHfxo=; b=QUNzhrqJrSYQUfj7bZ5eS5pcaWFsjG2h0DEXhVGVFMaHhYceEiKwI3CFODfPfl69tnzZIW gftTlwmqjT4Inkg/6GSPR61yDdNUfotPV685J1Eiad7czxd9xJEES0gfyD0KRnQhpx/HLO JfYAqG8kBOSOClPYqs1bedA6yDZceUg= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-342-b4_s_PnAMDWa7gKSOXsZTw-1; Wed, 28 May 2025 06:05:29 -0400 X-MC-Unique: b4_s_PnAMDWa7gKSOXsZTw-1 X-Mimecast-MFC-AGG-ID: b4_s_PnAMDWa7gKSOXsZTw_1748426728 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E38851800374; Wed, 28 May 2025 10:05:27 +0000 (UTC) Received: from thuth-p1g4.redhat.com (unknown [10.44.34.110]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 8CF5118004A7; Wed, 28 May 2025 10:05:24 +0000 (UTC) From: Thomas Huth To: qemu-devel@nongnu.org Cc: Stefan Hajnoczi , Alexandr Moshkov Subject: [PULL 05/27] tests/functional: add memlock tests Date: Wed, 28 May 2025 12:04:45 +0200 Message-ID: <20250528100507.313906-6-thuth@redhat.com> In-Reply-To: <20250528100507.313906-1-thuth@redhat.com> References: <20250528100507.313906-1-thuth@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 Received-SPF: pass client-ip=170.10.129.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) DKIMWL_WL_HIGH=-2.907, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Alexandr Moshkov Add new tests to check the correctness of the `-overcommit memlock` option (possible values: off, on, on-fault) by using `/proc/{qemu_pid}/status` file to check in VmSize, VmRSS and VmLck values: * if `memlock=off`, then VmLck = 0; * if `memlock=on`, then VmLck > 0 and almost all memory is resident; * if `memlock=on-fault`, then VmLck > 0 and only few memory is resident. Signed-off-by: Alexandr Moshkov Message-ID: <20250525070737.54267-3-dtalexundeer@yandex-team.ru> [thuth: improved the text in a comment] Signed-off-by: Thomas Huth --- tests/functional/meson.build | 1 + tests/functional/test_memlock.py | 79 ++++++++++++++++++++++++++++++++ 2 files changed, 80 insertions(+) create mode 100755 tests/functional/test_memlock.py diff --git a/tests/functional/meson.build b/tests/functional/meson.build index 52b4706cfe8..13079f58b66 100644 --- a/tests/functional/meson.build +++ b/tests/functional/meson.build @@ -68,6 +68,7 @@ tests_generic_system = [ 'empty_cpu_model', 'info_usernet', 'version', + 'memlock', ] tests_generic_linuxuser = [ diff --git a/tests/functional/test_memlock.py b/tests/functional/test_memlock.py new file mode 100755 index 00000000000..8910cb6da33 --- /dev/null +++ b/tests/functional/test_memlock.py @@ -0,0 +1,79 @@ +#!/usr/bin/env python3 +# +# Functional test that check overcommit memlock options +# +# Copyright (c) Yandex Technologies LLC, 2025 +# +# Author: +# Alexandr Moshkov +# +# SPDX-License-Identifier: GPL-2.0-or-later + +import re + +from typing import Dict + +from qemu_test import QemuSystemTest +from qemu_test import skipLockedMemoryTest + + +STATUS_VALUE_PATTERN = re.compile(r'^(\w+):\s+(\d+) kB', re.MULTILINE) + + +@skipLockedMemoryTest(2_097_152) # 2GB +class MemlockTest(QemuSystemTest): + """ + Runs a guest with memlock options. + Then verify, that this options is working correctly + by checking the smaps of the QEMU process. + """ + + def common_vm_setup_with_memlock(self, memlock): + self.vm.add_args('-overcommit', f'mem-lock={memlock}') + self.vm.launch() + + def test_memlock_off(self): + self.common_vm_setup_with_memlock('off') + + status = self.get_process_status_values(self.vm.get_pid()) + + self.assertTrue(status['VmLck'] == 0) + + def test_memlock_on(self): + self.common_vm_setup_with_memlock('on') + + status = self.get_process_status_values(self.vm.get_pid()) + + # VmLck > 0 kB and almost all memory is resident + self.assertTrue(status['VmLck'] > 0) + self.assertTrue(status['VmRSS'] >= status['VmSize'] * 0.70) + + def test_memlock_onfault(self): + self.common_vm_setup_with_memlock('on-fault') + + status = self.get_process_status_values(self.vm.get_pid()) + + # VmLck > 0 kB and only few memory is resident + self.assertTrue(status['VmLck'] > 0) + self.assertTrue(status['VmRSS'] <= status['VmSize'] * 0.30) + + def get_process_status_values(self, pid: int) -> Dict[str, int]: + result = {} + raw_status = self._get_raw_process_status(pid) + + for line in raw_status.split('\n'): + if m := STATUS_VALUE_PATTERN.match(line): + result[m.group(1)] = int(m.group(2)) + + return result + + def _get_raw_process_status(self, pid: int) -> str: + try: + with open(f'/proc/{pid}/status', 'r') as f: + return f.read() + except FileNotFoundError: + self.skipTest("Can't open status file of the process") + + +if __name__ == '__main__': + MemlockTest.main() -- 2.49.0