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trace2line: gem5 support

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As noted however, it is potentially too slow to be useful.

run: unify gem5 and qemu tracing under -T

readme: overhaul tracing documentation from what I've learnt from trace2line
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Ciro Santilli
2018-04-25 08:41:41 +01:00
parent 14965a40d2
commit ab21ef58de
8 changed files with 131 additions and 50 deletions
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11
run-usage.adoc
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@@ -40,11 +40,12 @@
The default is the minimum amount that boots all archs without extra
options added. Anything lower will lead some arch to fail to boot.
Any
|`-T` | |Enable extra QEMU trace events.
`./configure --enable-trace-backends=simple` seems to enable
some by default, e.g. `pr_manager_run`, and I don't know how to
get rid of them. But those events are rare and should not impact
performance, so we just ignore them for now.
|`-T` |`TRACE_TYPES` |Set trace events to be enabled.
If not given, gem5 tracing is completely disabled, while QEMU tracing
is enabled but uses default traces that are very rare and don't affect
performance. `./configure --enable-trace-backends=simple` seems to enable
some traces by default, e.g. `pr_manager_run`, and I don't know how to
get rid of them.
|`-U` | |Pass extra parameters to the program running on the `-u` tmux split.
|`-u` | |Create a tmUx split the window.
You must already be inside of a `tmux` session to use this option.