From: Tom Zanussi <tom.zanussi@linux.intel.com>
To: Daniel Wagner <daniel.wagner@bmw-carit.de>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@redhat.com>, Carsten Emde <C.Emde@osadl.org>,
linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFD 5/5] tracing: Add trace_irqsoff tracepoints
Date: Thu, 30 Apr 2015 21:14:52 -0500 [thread overview]
Message-ID: <1430446492.17922.32.camel@picadillo> (raw)
In-Reply-To: <1430388385-29558-6-git-send-email-daniel.wagner@bmw-carit.de>
On Thu, 2015-04-30 at 12:06 +0200, Daniel Wagner wrote:
> Finally we place a few tracepoint at the end of critical section. With
> the hist trigger in place we can generate the plots.
>
> There are a few drawbacks compared to the latency_hist.patch [1]
>
> The latency plots contain the values from all CPUs. In theory you
> can also filter with something like
>
> 'hist:key=latency.bucket:val=hitcount:sort=latency if cpu==0'
>
> but I haven't got this working. I didn't spend much time figuring out
> why this doesn't work. Even if the above is working you still
I think it doesn't work because the tracepoint doesn't actually have a
'cpu' field to use in the filter...
Tom
next prev parent reply other threads:[~2015-05-01 2:15 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-30 10:06 [RFD 0/5] Add latency histogram Daniel Wagner
2015-04-30 10:06 ` [RFD 1/5] tracing: 'hist' triggers Daniel Wagner
2015-04-30 10:06 ` [RFD 2/5] tracing: Add support to sort on the key Daniel Wagner
2015-05-01 2:02 ` Tom Zanussi
2015-04-30 10:06 ` [RFD 3/5] tracing: Add option to quantize key values Daniel Wagner
2015-05-01 2:12 ` Tom Zanussi
2015-04-30 10:06 ` [RFD 4/5] tracing: Deference pointers without RCU checks Daniel Wagner
2015-04-30 10:06 ` [RFD 5/5] tracing: Add trace_irqsoff tracepoints Daniel Wagner
2015-05-01 2:14 ` Tom Zanussi [this message]
2015-05-01 2:54 ` Steven Rostedt
2015-05-01 9:23 ` Daniel Wagner
2015-05-04 14:05 ` Daniel Wagner
2015-05-04 15:41 ` Daniel Wagner
2015-05-06 6:31 ` Daniel Wagner
2015-05-01 1:52 ` [RFD 0/5] Add latency histogram Tom Zanussi
2015-05-01 9:22 ` Daniel Wagner
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