74 lines
2.6 KiB
Python
74 lines
2.6 KiB
Python
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# Record/replay test that boots a Linux kernel
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#
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# Copyright (c) 2020 ISP RAS
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#
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# Author:
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# Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
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#
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# This work is licensed under the terms of the GNU GPL, version 2 or
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# later. See the COPYING file in the top-level directory.
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import os
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import logging
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import time
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from avocado_qemu import wait_for_console_pattern
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from avocado.utils import archive
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from avocado.utils import process
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from boot_linux_console import LinuxKernelTest
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class ReplayKernel(LinuxKernelTest):
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"""
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Boots a Linux kernel in record mode and checks that the console
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is operational and the kernel command line is properly passed
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from QEMU to the kernel.
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Then replays the same scenario and verifies, that QEMU correctly
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terminates.
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"""
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timeout = 90
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KERNEL_COMMON_COMMAND_LINE = 'printk.time=1 panic=-1 '
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def run_vm(self, kernel_path, kernel_command_line, console_pattern,
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record, shift, args, replay_path):
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logger = logging.getLogger('replay')
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start_time = time.time()
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vm = self.get_vm()
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vm.set_console()
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if record:
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logger.info('recording the execution...')
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mode = 'record'
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else:
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logger.info('replaying the execution...')
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mode = 'replay'
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vm.add_args('-icount', 'shift=%s,rr=%s,rrfile=%s' %
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(shift, mode, replay_path),
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'-kernel', kernel_path,
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'-append', kernel_command_line,
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'-net', 'none',
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'-no-reboot')
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if args:
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vm.add_args(*args)
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vm.launch()
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self.wait_for_console_pattern(console_pattern, vm)
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if record:
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vm.shutdown()
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logger.info('finished the recording with log size %s bytes'
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% os.path.getsize(replay_path))
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else:
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vm.wait()
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logger.info('successfully finished the replay')
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elapsed = time.time() - start_time
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logger.info('elapsed time %.2f sec' % elapsed)
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return elapsed
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def run_rr(self, kernel_path, kernel_command_line, console_pattern,
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shift=7, args=None):
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replay_path = os.path.join(self.workdir, 'replay.bin')
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t1 = self.run_vm(kernel_path, kernel_command_line, console_pattern,
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True, shift, args, replay_path)
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t2 = self.run_vm(kernel_path, kernel_command_line, console_pattern,
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False, shift, args, replay_path)
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logger = logging.getLogger('replay')
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logger.info('replay overhead {:.2%}'.format(t2 / t1 - 1))
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