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[Bug 1899082] Re: ReplayKernel.test_x86_64_pc fails intermittently
From: |
Pavel Dovgalyuk |
Subject: |
[Bug 1899082] Re: ReplayKernel.test_x86_64_pc fails intermittently |
Date: |
Wed, 14 Oct 2020 08:14:34 -0000 |
I traced this bug to hw/char/serial.c/serial_ioport_read
Bug disappears when I add qemu_log("serial_ioport_read %x %x\n",
(int)addr, ret); into the end of this function.
I suppose that there is avocado (or socket) io synchronization problem,
because running the same test without avocado works normally.
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https://bugs.launchpad.net/bugs/1899082
Title:
ReplayKernel.test_x86_64_pc fails intermittently
Status in QEMU:
New
Bug description:
Even though this acceptance test is already skipped on GitLab CI, the
intermittent failures can be seen on other environments too.
The record phase works fine, but during the replay phase fail to
finish booting the kernel (until the expected place):
16:34:47 DEBUG| [ 0.034498] Last level dTLB entries: 4KB 0, 2MB 0, 4MB 0,
1GB 0
16:34:47 DEBUG| [ 0.034790] Spectre V2 : Spectre mitigation: LFENCE not
serializing, switching to generic retpoline
16:34:47 DEBUG| [ 0.035093] Spectre V2 : Mitigation: Full generic retpoline
16:34:47 DEBUG| [ 0.035347] Spectre V2 : Spectre v2 / SpectreRSB
mitigation: Filling RSB on context switch
16:34:47 DEBUG| [ 0.035667]
16:36:02 ERROR|
16:36:02 ERROR| Reproduced traceback from:
/home/cleber/src/avocado/avocado/avocado/core/test.py:767
16:36:02 ERROR| Traceback (most recent call last):
16:36:02 ERROR| File
"/var/lib/users/cleber/build/qemu/tests/acceptance/replay_kernel.py", line 92,
in test_x86_64_pc
16:36:02 ERROR| self.run_rr(kernel_path, kernel_command_line,
console_pattern, shift=5)
16:36:02 ERROR| File
"/var/lib/users/cleber/build/qemu/tests/acceptance/replay_kernel.py", line 73,
in run_rr
16:36:02 ERROR| False, shift, args, replay_path)
16:36:02 ERROR| File
"/var/lib/users/cleber/build/qemu/tests/acceptance/replay_kernel.py", line 55,
in run_vm
16:36:02 ERROR| self.wait_for_console_pattern(console_pattern, vm)
16:36:02 ERROR| File
"/var/lib/users/cleber/build/qemu/tests/acceptance/boot_linux_console.py", line
53, in wait_for_console_pattern
16:36:02 ERROR| vm=vm)
16:36:02 ERROR| File
"/var/lib/users/cleber/build/qemu/tests/acceptance/avocado_qemu/__init__.py",
line 130, in wait_for_console_pattern
16:36:02 ERROR| _console_interaction(test, success_message,
failure_message, None, vm=vm)
16:36:02 ERROR| File
"/var/lib/users/cleber/build/qemu/tests/acceptance/avocado_qemu/__init__.py",
line 82, in _console_interaction
16:36:02 ERROR| msg = console.readline().strip()
16:36:02 ERROR| File "/usr/lib64/python3.7/socket.py", line 575, in readinto
16:36:02 ERROR| def readinto(self, b):
16:36:02 ERROR| File
"/home/cleber/src/avocado/avocado/avocado/plugins/runner.py", line 77, in
sigterm_handler
16:36:02 ERROR| raise RuntimeError("Test interrupted by SIGTERM")
16:36:02 ERROR| RuntimeError: Test interrupted by SIGTERM
16:36:02 ERROR|
On my workstation, I can replicate the failure roughly once every 50
runs.
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