From: Tingwei Zhang <tingwei@codeaurora.org>
To: Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@redhat.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@st.com>
Cc: tsoni@codeaurora.org,
Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>,
Mathieu Poirier <mathieu.poirier@linaro.org>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Mao Jinlong <jinlmao@codeaurora.org>,
linux-kernel@vger.kernel.org,
Tingwei Zhang <tingwei@codeaurora.org>,
linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 0/6] tracing: export event trace and trace_marker
Date: Thu, 3 Sep 2020 08:17:00 +0800 [thread overview]
Message-ID: <20200903001706.28147-1-tingwei@codeaurora.org> (raw)
Ftrace has ability to export trace packets to other destination.
Currently, only function trace can be exported. This series extends the
support to event trace and trace_maker. STM is one possible destination to
export ftrace. Use separate channel for each CPU to avoid mixing up packets
from different CPUs together.
Change from v2:
Change flag definition to BIT(). (Steven)
Add comment in stm_ftrace_write() to clarify it's safe to use
smp_processor_id() here since preempt is disabled. (Steven)
Change from v1:
All changes are suggested by Steven Rostedt.
User separate flag to control function trace, event trace and trace mark.
Allocate channels according to num_possible_cpu() dynamically.
Move ftrace_exports routines up so all ftrace can use them.
Tingwei Zhang (6):
stm class: ftrace: change dependency to TRACING
tracing: add flag to control different traces
tracing: add trace_export support for event trace
tracing: add trace_export support for trace_marker
stm class: ftrace: enable supported trace export flag
stm class: ftrace: use different channel accroding to CPU
drivers/hwtracing/stm/Kconfig | 2 +-
drivers/hwtracing/stm/ftrace.c | 7 +-
include/linux/trace.h | 7 +
kernel/trace/trace.c | 270 ++++++++++++++++++---------------
4 files changed, 159 insertions(+), 127 deletions(-)
--
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a Linux Foundation Collaborative Project
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next reply other threads:[~2020-09-03 0:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-03 0:17 Tingwei Zhang [this message]
2020-09-03 0:17 ` [PATCH v3 1/6] stm class: ftrace: change dependency to TRACING Tingwei Zhang
2020-09-03 0:17 ` [PATCH v3 2/6] tracing: add flag to control different traces Tingwei Zhang
2020-09-03 0:17 ` [PATCH v3 3/6] tracing: add trace_export support for event trace Tingwei Zhang
2020-09-03 0:17 ` [PATCH v3 4/6] tracing: add trace_export support for trace_marker Tingwei Zhang
2020-09-03 0:17 ` [PATCH v3 5/6] stm class: ftrace: enable supported trace export flag Tingwei Zhang
2020-09-03 0:17 ` [PATCH v3 6/6] stm class: ftrace: use different channel accroding to CPU Tingwei Zhang
2020-09-18 12:45 ` Alexander Shishkin
2020-09-23 4:39 ` Tingwei Zhang
2020-09-14 23:27 ` [PATCH v3 0/6] tracing: export event trace and trace_marker Tingwei Zhang
2020-09-18 14:26 ` Alexander Shishkin
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