On 25 August 2016 at 10:56, Daniel Wagner daniel.wagner@bmw-carit.de wrote:
Hi Binoy,
On 08/24/2016 01:17 PM, Binoy Jayan wrote:
Histogram output: cat /sys/kernel/debug/tracing/events/latency/latency_irqs/hist cat /sys/kernel/debug/tracing/events/latency/latency_preempt/hist cat /sys/kernel/debug/tracing/events/latency/latency_critical_timings/hist cat /sys/kernel/debug/tracing/events/latency/latency_hrtimer_interrupt/hist
[...]
Changes from v1 as per comments from Steven/Daniel
- Use single tracepoint for irq/preempt/critical timings by introducing a trace type field to differentiate trace type in the same tracepoint.
Did you send out the right patches? This version still looks like the previous one in this regard. And wouldn't be the 'Histogram output' have only one file? Maybe I just understood something wrong here.
cheers, daniel
Hi Daniel,
This patch is after incorporating changes w.r.t. comments by steven. And regarding using one tracepoint, I have mentioned the same in the cover letter. I have sent you (only) another patch with that change. When I do it like that I get an RCU error, the first time the "type" key is used. It is weird that it happens only for the first time something is echo-ed to the trigger file. I haven't been able to figure out why yet.
Binoy