support for stats static userspace probes via systemtap
We currently only have probes for the logging sub-system.
This patch adds two tracepoints for tracing the performance
impact of statistics reporting: stat_start and stat_done.
They can be used to trace the amount of time a libosmocore-using
application spends in reporting/exporting statistics. This includes
both the CPU time for encoding the statistics, as well as the system
calls for sending them.
Change-Id: I7208c45f6d051505dd2435305c67b4d26c0b1dd2
Related: OS#4311
Related: SYS#4877
diff --git a/tapset/libosmocore.stp b/tapset/libosmocore.stp
index 0ec3c42..a3e8f21 100644
--- a/tapset/libosmocore.stp
+++ b/tapset/libosmocore.stp
@@ -16,3 +16,14 @@
{
probestr = sprintf("%s", $$name);
}
+
+probe libosmocore_stats_start = process("libosmocore").mark("statsd_start")
+{
+ count = $arg1;
+ probestr = sprintf("%s(count=%d), $$name, count);
+}
+
+probe libosmocore_stats_done = process("libosmocore").mark("statsd_done")
+{
+ probestr = sprintf("%s", $$name);
+}