linux-kernel - Re: Support Intel uncore event lists

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Date:   Mon, 17 Oct 2016 12:58:50 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Andi Kleen <andi@...stfloor.org>
Cc:     acme@...nel.org, jolsa@...nel.org, sukadev@...ux.vnet.ibm.com,
        eranian@...gle.com, linux-kernel@...r.kernel.org
Subject: Re: Support Intel uncore event lists

On Thu, Oct 13, 2016 at 02:15:22PM -0700, Andi Kleen wrote:
> This adds uncore support on top of the recently merged JSON event list
> infrastructure for core events. Uncore is everything outside the core,
> including memory controllers, PCI, interconnect etc.
> 
> Uncore is more complicated to handle than core events because it uses
> many duplicated PMUs, which leads to long event lists and verbose duplicated
> outputs. 
> 
> In fact previously it was nearly unusable for many cases without special 
> tools to generate event list and aggregate data (such as 
> https://github.com/andikleen/pmu-tools/tree/master/ucevent)
> 
> With this patchkit we add:
> - Basic support for uncore events in JSON events
> - Support aliases that get duplicated over many PMUs transparently
> - Support summing up duplicated PMUs per socket
> - Support extending the perf stat builtin metrics with simple ratios
> specified in the event list. This covers the vast majority of useful
> metrics.
> 
> So far mainly servers are supported. Also this is not using full event lists
> (which are full of very obscure events) but only for a smaller subset of
> curated useful and understandable metrics.
> 
> The actual event lists are not posted, but available at
> git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc perf/intel-uncore-json-files-1
> 
> The code is available here
> git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc perf/builtin-json-15

perf test 5 is failing

[jolsa@...va perf]$ sudo ./perf test 5 -v
...
mem-loads -> cpu/event=0xcd,umask=0x1,ldlat=3/
failed to parse event 'mem-snp-hit:u,cpu/event=mem-snp-hit/u', err 1
test child finished with 1
---- end ----
parse events tests: FAILED!

jirka