ftrace Package¶
ftrace
Module¶
Function tracer profiler for autotest.
author: | David Sharp (dhsharp@google.com) |
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class
autotest.client.profilers.ftrace.ftrace.
ftrace
(job)[source]¶ Bases:
autotest.client.profiler.profiler
ftrace profiler for autotest. It builds ftrace from souce and runs trace-cmd with configurable parameters.
@see: git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
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initialize
(tracepoints, buffer_size_kb=1408, **kwargs)[source]¶ Initialize ftrace profiler.
Parameters: - tracepoints – List containing a mix of tracpoint names and (tracepoint name, filter) tuples. Tracepoint names are as accepted by trace-cmd -e, eg “syscalls”, or “syscalls:sys_enter_read”. Filters are as accepted by trace-cmd -f, eg “((sig >= 10 && sig < 15) || sig == 17)”
- buffer_size_kb – Set the size of the ring buffer (per cpu).
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static
join_command
()[source]¶ Shell escape the command for BgJob. grmbl.
Parameters: cmd – Command list.
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mountpoint
= '/sys/kernel/debug'¶
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setup
(tarball='trace-cmd.tar.bz2', **kwargs)[source]¶ Build and install trace-cmd from source.
The tarball was obtained by checking the git repo at 09-14-2010, removing the Documentation and the .git folders, and compressing it.
Parameters: - tarball – Path to trace-cmd tarball.
- **kwargs –
Dictionary with additional parameters.
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start
(test)[source]¶ Start ftrace profiler
Parameters: test – Autotest test in which the profiler will operate on.
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stop
(test)[source]¶ Stop ftrace profiler.
Parameters: test – Autotest test in which the profiler will operate on.
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tracing_dir
= '/sys/kernel/debug/tracing'¶
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version
= 1¶
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