[SCM] Samba Shared Repository - branch master updated

[Ralph Böhme]

The branch, master has been updated
       via  b2f2ce0 examples: add cache effectiveness stats to gencache.stp
      from  62925cf README.Coding: add "Error and out logic"

https://git.samba.org/?p=samba.git;a=shortlog;h=master


- Log -----------------------------------------------------------------
commit b2f2ce0acc305f6ec99edf948c5994d7180c08a6
Author: Ralph Boehme <slow at samba.org>
Date:   Wed Jul 26 14:29:33 2017 +0200

    examples: add cache effectiveness stats to gencache.stp
    
    Signed-off-by: Ralph Boehme <slow at samba.org>
    Reviewed-by: Stefan Metzmacher <metze at samba.org>
    
    Autobuild-User(master): Ralph Böhme <slow at samba.org>
    Autobuild-Date(master): Fri Aug 11 14:19:24 CEST 2017 on sn-devel-144

-----------------------------------------------------------------------

Summary of changes:
 examples/systemtap/gencache.stp | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)


Changeset truncated at 500 lines:

diff --git a/examples/systemtap/gencache.stp b/examples/systemtap/gencache.stp
index 225f0ae..95fcff3 100755
--- a/examples/systemtap/gencache.stp
+++ b/examples/systemtap/gencache.stp
@@ -18,6 +18,7 @@
 #
 
 global running, intervals
+global cache_misses, cache_hits, neg_cache_hits
 
 probe begin {
 	printf("Collecting data, press ctrl-C to stop... ")
@@ -37,6 +38,18 @@ probe process(@1).library("*").function("gencache_parse").return {
 
 	duration = end - begin
 	intervals["gencache_parse"] <<< duration
+
+	if ($return == 0) {
+		cache_misses++
+	} else {
+		cache_hits++
+	}
+}
+
+probe process(@1).library("*").function("gencache_get_data_blob_parser") {
+	if ($timeout == 0) {
+		neg_cache_hits++
+	}
 }
 
 probe process(@1).library("*").function("gencache_get_data_blob") {
@@ -106,6 +119,16 @@ probe process(@1).library("*").function("gencache_stabilize").return {
 probe end {
 	printf("\n\n")
 
+	printf("Summary of cache access stats\n")
+	printf("=============================\n\n")
+	printf("%-10s %-10s %-10s\n",
+	       "Hits", "Misses", "Negative-Hits");
+	printf("--------------------------------------\n")
+	printf("%-10d %-10d %-10d\n",
+	       cache_hits, cache_misses, neg_cache_hits);
+
+	printf("\n")
+
 	foreach ([name] in intervals) {
 		printf("%-30s count: %d sum: %d us (min: %d us avg: %d us max: %d us)\n",
 		       name,


-- 
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