From: Daniel Wagner <daniel.wagner@bmw-carit.de>
To: Binoy Jayan <binoy.jayan@linaro.org>,
"Steven Rostedt (Red Hat)" <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>, Arnd Bergmann <arnd@arndb.de>,
<linux-kernel@vger.kernel.org>,
Masami <masami.hiramatsu@linaro.org>
Subject: Re: [PATCH v4 0/3] *** Latency histograms - IRQSOFF,PREEMPTOFF ***
Date: Tue, 30 Aug 2016 13:39:43 +0200 [thread overview]
Message-ID: <dbbb4a5c-50ff-2da0-c2bb-166dee1532ea@bmw-carit.de> (raw)
In-Reply-To: <1472552924-22297-1-git-send-email-binoy.jayan@linaro.org>
Hi Binoy,
On 08/30/2016 12:28 PM, Binoy Jayan wrote:
> Examples of triggers:
> echo 'hist:key=latency.log2:val=hitcount:sort=latency' > /sys/kernel/debug/tracing/events/latency/latency_preempt/trigger
> echo 'hist:key=cpu,latency:val=hitcount:sort=latency if cpu==1' > /sys/kernel/debug/tracing/events/latency/latency_preempt/trigger
> echo 'hist:key=ltype,cpu:val=latency:sort=ltype,cpu if ltype==0' > /sys/kernel/debug/tracing/events/latency/latency_preempt/trigger
>
> Histogram output:
> cat /sys/kernel/debug/tracing/events/latency/latency_preempt/hist
Could you also add couple of test cases to
tools/testing/selftests/ftrace/test.d/trigger?
Especially the sorting thing you mentioned in the other mail? Obviously
first we need to figure out what is the expected behavior of it :)
cheers,
daniel
next prev parent reply other threads:[~2016-08-30 11:39 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-30 10:28 [PATCH v4 0/3] *** Latency histograms - IRQSOFF,PREEMPTOFF *** Binoy Jayan
2016-08-30 10:28 ` [PATCH v4 1/3] tracing: Deference pointers without RCU checks Binoy Jayan
2016-08-30 10:28 ` [PATCH v4 2/3] tracing: Add trace_irqsoff tracepoints Binoy Jayan
2016-08-30 11:30 ` Daniel Wagner
2016-08-30 11:49 ` Binoy Jayan
2016-08-30 14:08 ` Steven Rostedt
2016-08-31 11:39 ` Binoy Jayan
2016-08-30 10:28 ` [PATCH v4 3/3] tracing: Histogram for missed timer offsets Binoy Jayan
2016-08-30 10:50 ` Masami Hiramatsu
2016-09-02 12:41 ` Binoy Jayan
2016-09-02 15:54 ` Masami Hiramatsu
2016-08-30 14:15 ` Steven Rostedt
2016-08-31 11:34 ` Binoy Jayan
2016-08-31 12:42 ` Steven Rostedt
2016-08-30 11:39 ` Daniel Wagner [this message]
2016-08-30 12:02 ` [PATCH v4 0/3] *** Latency histograms - IRQSOFF,PREEMPTOFF *** Masami Hiramatsu
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