From c7ebab0f16fd4e0dc3dd6d9c7ea73876a9db88f5 Mon Sep 17 00:00:00 2001 From: Pavel Dovgalyuk Date: Fri, 29 May 2020 10:04:51 +0300 Subject: [PATCH] tests/acceptance: add base class record/replay kernel tests MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch adds a base for testing kernel boot recording and replaying. Each test has the phase of recording and phase of replaying. Virtual machines just boot the kernel and do not interact with the network. Structure and image links for the tests are borrowed from boot_linux_console.py Testing controls the message pattern at the end of the kernel boot for both record and replay modes. In replay mode QEMU is also intended to finish the execution automatically. Signed-off-by: Pavel Dovgalyuk Tested-by: Philippe Mathieu-Daude Message-Id: <159073589099.20809.14078431743098373301.stgit@pasha-ThinkPad-X280> Reviewed-by: Philippe Mathieu-Daudé [PMD: Keep imports sorted alphabetically] Signed-off-by: Philippe Mathieu-Daudé --- MAINTAINERS | 1 + tests/acceptance/replay_kernel.py | 73 +++++++++++++++++++++++++++++++ 2 files changed, 74 insertions(+) create mode 100644 tests/acceptance/replay_kernel.py diff --git a/MAINTAINERS b/MAINTAINERS index 7b1262e925..dc61830c64 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2534,6 +2534,7 @@ F: net/filter-replay.c F: include/sysemu/replay.h F: docs/replay.txt F: stubs/replay.c +F: tests/acceptance/replay_kernel.py IOVA Tree M: Peter Xu diff --git a/tests/acceptance/replay_kernel.py b/tests/acceptance/replay_kernel.py new file mode 100644 index 0000000000..90986ca503 --- /dev/null +++ b/tests/acceptance/replay_kernel.py @@ -0,0 +1,73 @@ +# Record/replay test that boots a Linux kernel +# +# Copyright (c) 2020 ISP RAS +# +# Author: +# Pavel Dovgalyuk +# +# This work is licensed under the terms of the GNU GPL, version 2 or +# later. See the COPYING file in the top-level directory. + +import os +import logging +import time + +from avocado_qemu import wait_for_console_pattern +from avocado.utils import archive +from avocado.utils import process +from boot_linux_console import LinuxKernelTest + +class ReplayKernel(LinuxKernelTest): + """ + Boots a Linux kernel in record mode and checks that the console + is operational and the kernel command line is properly passed + from QEMU to the kernel. + Then replays the same scenario and verifies, that QEMU correctly + terminates. + """ + + timeout = 90 + KERNEL_COMMON_COMMAND_LINE = 'printk.time=1 panic=-1 ' + + def run_vm(self, kernel_path, kernel_command_line, console_pattern, + record, shift, args, replay_path): + logger = logging.getLogger('replay') + start_time = time.time() + vm = self.get_vm() + vm.set_console() + if record: + logger.info('recording the execution...') + mode = 'record' + else: + logger.info('replaying the execution...') + mode = 'replay' + vm.add_args('-icount', 'shift=%s,rr=%s,rrfile=%s' % + (shift, mode, replay_path), + '-kernel', kernel_path, + '-append', kernel_command_line, + '-net', 'none', + '-no-reboot') + if args: + vm.add_args(*args) + vm.launch() + self.wait_for_console_pattern(console_pattern, vm) + if record: + vm.shutdown() + logger.info('finished the recording with log size %s bytes' + % os.path.getsize(replay_path)) + else: + vm.wait() + logger.info('successfully finished the replay') + elapsed = time.time() - start_time + logger.info('elapsed time %.2f sec' % elapsed) + return elapsed + + def run_rr(self, kernel_path, kernel_command_line, console_pattern, + shift=7, args=None): + replay_path = os.path.join(self.workdir, 'replay.bin') + t1 = self.run_vm(kernel_path, kernel_command_line, console_pattern, + True, shift, args, replay_path) + t2 = self.run_vm(kernel_path, kernel_command_line, console_pattern, + False, shift, args, replay_path) + logger = logging.getLogger('replay') + logger.info('replay overhead {:.2%}'.format(t2 / t1 - 1))