diff options
author | Ralph Boehme <slow@samba.org> | 2017-06-30 12:59:37 +0200 |
---|---|---|
committer | Ralph Boehme <slow@samba.org> | 2017-07-19 12:00:15 +0200 |
commit | 995aec51da659e46cbcc2bc07f4be19a9b0a38d1 (patch) | |
tree | df2528c70fb02700dbd5f8cf9dc47d39b78fa293 /examples | |
parent | f7daa453045c787ddab6e04c1fdaa386c231371f (diff) | |
download | samba-995aec51da659e46cbcc2bc07f4be19a9b0a38d1.tar.gz |
examples: add gencache.stp
Add a Systemtap script to profile gencache.
Usage:
- profile a single smbd process:
# stap -x 22225 gencache.stp smbd
- profile all winbindd proceses:
# stap gencache.stp winbindd
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Diffstat (limited to 'examples')
-rwxr-xr-x | examples/systemtap/gencache.stp | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/examples/systemtap/gencache.stp b/examples/systemtap/gencache.stp new file mode 100755 index 00000000000..225f0aefd71 --- /dev/null +++ b/examples/systemtap/gencache.stp @@ -0,0 +1,124 @@ +#!/usr/bin/stap +# +# Systemtap script to instrument the Samba gencache subsystem +# +# Usage: +# +# Instrument all smbd processes: +# # stap gencache.stp smbd +# +# Instrument all winbindd processes: +# # stap gencache.stp winbindd +# +# Instrument a specific smbd process: +# # stap -x PID gencache.stp smbd +# +# Instrument a specific winbindd process: +# # stap -x PID gencache.stp winbindd +# + +global running, intervals + +probe begin { + printf("Collecting data, press ctrl-C to stop... ") +} + +probe process(@1).library("*").function("gencache_parse") { + running["gencache_parse", tid()] = gettimeofday_us() +} + +probe process(@1).library("*").function("gencache_parse").return { + if (!(["gencache_parse", tid()] in running)) + next + + end = gettimeofday_us() + begin = running["gencache_parse", tid()] + delete running["gencache_parse", tid()] + + duration = end - begin + intervals["gencache_parse"] <<< duration +} + +probe process(@1).library("*").function("gencache_get_data_blob") { + running["gencache_get_data_blob", tid()] = gettimeofday_us() +} + +probe process(@1).library("*").function("gencache_get_data_blob").return { + if (!(["gencache_get_data_blob", tid()] in running)) + next + + end = gettimeofday_us() + begin = running["gencache_get_data_blob", tid()] + delete running["gencache_get_data_blob", tid()] + + duration = end - begin + intervals["gencache_get_data_blob"] <<< duration +} + +probe process(@1).library("*").function("gencache_set_data_blob") { + running["gencache_set_data_blob", tid()] = gettimeofday_us() +} + +probe process(@1).library("*").function("gencache_set_data_blob").return { + if (!(["gencache_set_data_blob", tid()] in running)) + next + + end = gettimeofday_us() + begin = running["gencache_set_data_blob", tid()] + delete running["gencache_set_data_blob", tid()] + + duration = end - begin + intervals["gencache_set_data_blob"] <<< duration +} + +probe process(@1).library("*").function("gencache_del") { + running["gencache_del", tid()] = gettimeofday_us() +} + +probe process(@1).library("*").function("gencache_del").return { + if (!(["gencache_del", tid()] in running)) + next + + end = gettimeofday_us() + begin = running["gencache_del", tid()] + delete running["gencache_del", tid()] + + duration = end - begin + intervals["gencache_del"] <<< duration +} + +probe process(@1).library("*").function("gencache_stabilize") { + running["gencache_stabilize", tid()] = gettimeofday_us() +} + +probe process(@1).library("*").function("gencache_stabilize").return { + if (!(["gencache_stabilize", tid()] in running)) + next + + end = gettimeofday_us() + begin = running["gencache_stabilize", tid()] + delete running["gencache_stabilize", tid()] + + duration = end - begin + intervals["gencache_stabilize"] <<< duration +} + +probe end { + printf("\n\n") + + foreach ([name] in intervals) { + printf("%-30s count: %d sum: %d us (min: %d us avg: %d us max: %d us)\n", + name, + @count(intervals[name]), + @sum(intervals[name]), + @min(intervals[name]), + @avg(intervals[name]), + @max(intervals[name])) + } + + printf("\n") + foreach ([name] in intervals) { + printf("%s time distribution histogram:\n", name) + println(@hist_log(intervals[name])) + } +} |