Messages in this thread | | | Date | Wed, 30 Dec 2009 12:30:31 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH v3 1/5] perf_event: introduce 'inject' event and get HZ |
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* Peter Zijlstra <peterz@infradead.org> wrote:
> OK so there is no sysconf() syscall and its all implemented in glibc, which > is utter suckage.. will have to come up with something saner then.
I think integrating it into the perf stream of events would be the most desirable approach - tooling could make use of it easily.
For data record (and hierarchy) description /debug/tracing/events/ would be useful.
We dont want to actually 'activate' them in an 'event' fashion - but we could use event IDs and the record format and the transport to describe and recover the values.
For transport we could use the mmap ring-buffer and it would also be nice to add (or resurrect) some 'quick & easy' read()/write() based transport. It a bit like a value read-out from a counter - just here it's not a regular counter but some sort of kernel-internal value that we want to provide.
Hm?
Ingo
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