Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1179735
| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RFC PATCH v3 4/4] trace: Trace log handler for logging into STM blocks |
| Date | 2015-07-08 14:40 +0200 |
| Message-ID | <pJWNQ-2GX-9@gated-at.bofh.it> (permalink) |
| References | <pJy8N-4of-5@gated-at.bofh.it> <pJy8N-4of-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Tue, Jul 07, 2015 at 06:10:43PM +0800, Chunyan Zhang wrote:
> Add the function 'trace_event_stm_output_##call' for printing events
> trace log into STM blocks.
>
> This patch also adds a function call at where the events have been
> committed to ring buffer to export the trace event information to
> STM blocks.
So then you have two copies of the data, why that? Would a scheme were
data either goes to the STM or the regular buffer not make much more
sense?
> +++ b/include/trace/perf.h
> @@ -175,6 +175,7 @@ trace_event_raw_event_##call(void *__data, proto) \
> { assign; } \
> \
> trace_event_buffer_commit(&fbuffer); \
> + trace_event_stm_log(&fbuffer); \
This makes every trace event slower.
> }
> /*
> * The ftrace_test_probe is compiled out, it is only here as a build time check
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[RFC PATCH v3 4/4] trace: Trace log handler for logging into STM blocks Chunyan Zhang <zhang.chunyan@linaro.org> - 2015-07-07 12:20 +0200
Re: [RFC PATCH v3 4/4] trace: Trace log handler for logging into STM blocks Peter Zijlstra <peterz@infradead.org> - 2015-07-08 14:40 +0200
Re: [RFC PATCH v3 4/4] trace: Trace log handler for logging into STM blocks Chunyan Zhang <zhang.chunyan@linaro.org> - 2015-07-08 15:10 +0200
Re: [RFC PATCH v3 4/4] trace: Trace log handler for logging into STM blocks Ingo Molnar <mingo@kernel.org> - 2015-07-08 15:30 +0200
Re: [RFC PATCH v3 4/4] trace: Trace log handler for logging into STM blocks Steven Rostedt <rostedt@goodmis.org> - 2015-07-08 15:20 +0200
Re: [RFC PATCH v3 4/4] trace: Trace log handler for logging into STM blocks Chunyan Zhang <zhang.chunyan@linaro.org> - 2015-07-10 11:10 +0200
Re: [RFC PATCH v3 4/4] trace: Trace log handler for logging into STM blocks Chunyan Zhang <zhang.chunyan@linaro.org> - 2015-07-17 08:00 +0200
csiph-web