Re: Sample memory references with at least a given latency?

[Harald Servat <harald.servat@bsc.es>]

Hello Manuel,

    that's a very nice interesting piece of code! Thank you very much!

    Now two different questions arise:

     * still, is this possible through regular perf binary from the 
linux kernel?

     * with respect to your code, I observe that the data region for the 
PEBS collected samples is pointed by metadata_page. However, when 
printing its contents through print_samples the output does not print 
time-stamps. Are the time-stamps collected? If so, how can one access to 
that information?

Thank you very much in advance!!

On 04/02/15 14:06, Manuel Selva wrote:
> Yes you can. I wrote a small "memory not" for how to do this while
> trying to enable memory sampling:
>
> https://manuelselva.wordpress.com/2013/10/31/how-to-use-the-linux-perf_event_open-system-call/
>
> I also wrote some code exampl here:
> https://github.com/ManuelSelva/c4fun/tree/master/pebs_tests
>
> 2015-02-04 13:48 GMT+01:00 Harald Servat <harald.servat@bsc.es
> <mailto:harald.servat@bsc.es>>:
>
>     Hello list,
>
>        is there any way to configure perf to sample memory references
>     through PEBS and enable the Load Latency Performance Monitoring
>     Facility (section 18.7.1.2 from the Intel 64 and IA-32 Architectures
>     Software Developer's Manual).
>
>     Thank you very much in advance.
>
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