Add software PMC support.

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

1 files changed, 8 insertions, 0 deletions

diff --git a/lib/libpmc/pmclog.h b/lib/libpmc/pmclog.h
index b7c9c84..2a50945 100644
--- a/lib/libpmc/pmclog.h
+++ b/lib/libpmc/pmclog.h
@@ -88,6 +88,13 @@ struct pmclog_ev_pmcallocate {
 	pmc_id_t	pl_pmcid;
 };
 
+struct pmclog_ev_pmcallocatedyn {
+	uint32_t	pl_event;
+	char 		pl_evname[PMC_NAME_MAX];
+	uint32_t	pl_flags;
+	pmc_id_t	pl_pmcid;
+};
+
 struct pmclog_ev_pmcattach {
 	pmc_id_t	pl_pmcid;
 	pid_t		pl_pid;
@@ -146,6 +153,7 @@ struct pmclog_ev {
 		struct pmclog_ev_map_out	pl_mo;
 		struct pmclog_ev_pcsample	pl_s;
 		struct pmclog_ev_pmcallocate	pl_a;
+		struct pmclog_ev_pmcallocatedyn	pl_ad;
 		struct pmclog_ev_pmcattach	pl_t;
 		struct pmclog_ev_pmcdetach	pl_d;
 		struct pmclog_ev_proccsw	pl_c;