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[Qemu-devel] [Bug 1391942] Re: Unnecessary events option of the trace ar
From: |
Francis Deslauriers |
Subject: |
[Qemu-devel] [Bug 1391942] Re: Unnecessary events option of the trace argument with UST backend |
Date: |
Wed, 07 Jan 2015 16:20:47 -0000 |
It works without the -trace option.
Want I meant with this post is that the "events" argument of the "-trace"
option has no effect in the case of using LTTng UST as the tracing backend
because the events are enabled from the LTTng tracer itself.
Is there some way I can make an argument optional or conditional to a tracing
framework?
Thanks,
Francis
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https://bugs.launchpad.net/bugs/1391942
Title:
Unnecessary events option of the trace argument with UST backend
Status in QEMU:
New
Bug description:
When running configure with the --enable-trace-backends=ust option and
compiling.
The user should not have to specify a the "events" and "file" options because
they are not used with that tracing framework.
Right now, in order the use this option the need to specify a dummy
events file.
This fails:
$> qemu-system-x86_64 -hda debian_wheezy_amd64_standard.qcow2 -trace -m 512
qemu-system-x86_64: -trace -m: Invalid parameter '-m'
This works:
$> qemu-system-x86_64 -hda debian_wheezy_amd64_standard.qcow2 -trace
events=dummy-events.txt -m 512
VNC server running on `127.0.0.1:5900'
I am using version:
$> qemu-system-x86_64 --version
QEMU emulator version 2.1.90, Copyright (c) 2003-2008 Fabrice Bellard
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