On Sandy Bridge and later, to count branch-related events you
have to or together a mask indicating the type of branch
instruction to count (e.g. direct jump, branch, etc) and a bits
indicating whether to count taken and not-taken branches. The
current counter definitions where defining this bits individually,
so the counters never worked and always just counted 0.
Fix the counter definitions to instead contain the proper
combination of masks. Also update the man pages to reflect the
new counters.
Differential Revision: https://reviews.freebsd.org/D1587
MFC after: 1 month
Sponsored by: Sandvine Inc.
case 0x3E: /* Per Intel document 325462-045US 01/2013. */
Add manpage to document all the goodness that is available in this
processor model.
No support for uncore events at this time.
Submitted by: hiren panchasara <hiren.panchasara@gmail.com>
Reviewed by: davide, jimharris, sbruno
Obtained from: Yahoo! Inc.
MFC after: 2 weeks
New kernel events can be added at various location for sampling or counting.
This will for example allow easy system profiling whatever the processor is
with known tools like pmcstat(8).
Simultaneous usage of software PMC and hardware PMC is possible, for example
looking at the lock acquire failure, page fault while sampling on
instructions.
Sponsored by: NETASQ
MFC after: 1 month
