X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fcoverage.c;h=2b8b6e6ced1edb32077cc55fade1691bcf62307a;hb=c55acc2eed76ae17667fa5f65f5f3c347b796926;hp=eaa441c0db905665da332b3c38c1d9f4f9c27597;hpb=34e63086edddcae06d7c1a4fa84fec0861e50758;p=sliver-openvswitch.git

diff --git a/lib/coverage.c b/lib/coverage.c
index eaa441c0d..2b8b6e6ce 100644
--- a/lib/coverage.c
+++ b/lib/coverage.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009 Nicira Networks.
+ * Copyright (c) 2009, 2010 Nicira Networks.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,16 +18,49 @@
 #include "coverage.h"
 #include <inttypes.h>
 #include <stdlib.h>
-#include "coverage-counters.h"
 #include "dynamic-string.h"
 #include "hash.h"
+#include "unixctl.h"
 #include "util.h"
-
-#define THIS_MODULE VLM_coverage
 #include "vlog.h"
 
+VLOG_DEFINE_THIS_MODULE(coverage);
+
+/* The coverage counters. */
+#if USE_LINKER_SECTIONS
+extern struct coverage_counter *__start_coverage[];
+extern struct coverage_counter *__stop_coverage[];
+#define coverage_counters __start_coverage
+#define n_coverage_counters  (__stop_coverage - __start_coverage)
+#else  /* !USE_LINKER_SECTIONS */
+#define COVERAGE_COUNTER(NAME) COVERAGE_DEFINE__(NAME);
+#include "coverage.def"
+#undef COVERAGE_COUNTER
+
+struct coverage_counter *coverage_counters[] = {
+#define COVERAGE_COUNTER(NAME) &counter_##NAME,
+#include "coverage.def"
+#undef COVERAGE_COUNTER
+};
+#define n_coverage_counters ARRAY_SIZE(coverage_counters)
+#endif  /* !USE_LINKER_SECTIONS */
+
 static unsigned int epoch;
 
+static void
+coverage_unixctl_log(struct unixctl_conn *conn, const char *args OVS_UNUSED,
+                     void *aux OVS_UNUSED)
+{
+    coverage_log(VLL_WARN, false);
+    unixctl_command_reply(conn, 200, NULL);
+}
+
+void
+coverage_init(void)
+{
+    unixctl_command_register("coverage/log", coverage_unixctl_log, NULL);
+}
+
 /* Sorts coverage counters in descending order by count, within equal counts
  * alphabetically by name. */
 static int
@@ -52,15 +85,15 @@ coverage_hash(void)
     int n_groups, i;
 
     /* Sort coverage counters into groups with equal counts. */
-    c = xmalloc(coverage_n_counters * sizeof *c);
-    for (i = 0; i < coverage_n_counters; i++) {
+    c = xmalloc(n_coverage_counters * sizeof *c);
+    for (i = 0; i < n_coverage_counters; i++) {
         c[i] = coverage_counters[i];
     }
-    qsort(c, coverage_n_counters, sizeof *c, compare_coverage_counters);
+    qsort(c, n_coverage_counters, sizeof *c, compare_coverage_counters);
 
     /* Hash the names in each group along with the rank. */
     n_groups = 0;
-    for (i = 0; i < coverage_n_counters; ) {
+    for (i = 0; i < n_coverage_counters; ) {
         int j;
 
         if (!c[i]->count) {
@@ -68,7 +101,7 @@ coverage_hash(void)
         }
         n_groups++;
         hash = hash_int(i, hash);
-        for (j = i; j < coverage_n_counters; j++) {
+        for (j = i; j < n_coverage_counters; j++) {
             if (c[j]->count != c[i]->count) {
                 break;
             }
@@ -94,7 +127,7 @@ coverage_hit(uint32_t hash)
     unsigned int word_mask = 1u << (bit_index % BITS_PER_WORD);
 
     if (hit[word_index] & word_mask) {
-        return true;
+ return true;
     } else {
         hit[word_index] |= word_mask;
         return false;
@@ -107,9 +140,13 @@ coverage_log_counter(enum vlog_level level, const struct coverage_counter *c)
     VLOG(level, "%-24s %5u / %9llu", c->name, c->count, c->count + c->total);
 }
 
-/* Logs the coverage counters at the given vlog 'level'. */
+/* Logs the coverage counters at the given vlog 'level'.  If
+ * 'suppress_dups' is true, then duplicate events are not displayed.
+ * Care should be taken in the value used for 'level'.  Depending on the
+ * configuration, syslog can write changes synchronously, which can
+ * cause the coverage messages to take several seconds to write. */
 void
-coverage_log(enum vlog_level level)
+coverage_log(enum vlog_level level, bool suppress_dups)
 {
     size_t n_never_hit;
     uint32_t hash;
@@ -120,22 +157,24 @@ coverage_log(enum vlog_level level)
     }
 
     hash = coverage_hash();
-    if (coverage_hit(hash)) {
-        VLOG(level, "Skipping details of duplicate event coverage for "
-             "hash=%08"PRIx32" in epoch %u", hash, epoch);
-        return;
+    if (suppress_dups) {
+        if (coverage_hit(hash)) {
+            VLOG(level, "Skipping details of duplicate event coverage for "
+                 "hash=%08"PRIx32" in epoch %u", hash, epoch);
+            return;
+        }
     }
 
     n_never_hit = 0;
     VLOG(level, "Event coverage (epoch %u/entire run), hash=%08"PRIx32":",
          epoch, hash);
-    for (i = 0; i < coverage_n_counters; i++) {
+    for (i = 0; i < n_coverage_counters; i++) {
         struct coverage_counter *c = coverage_counters[i];
         if (c->count) {
             coverage_log_counter(level, c);
         }
     }
-    for (i = 0; i < coverage_n_counters; i++) {
+    for (i = 0; i < n_coverage_counters; i++) {
         struct coverage_counter *c = coverage_counters[i];
         if (!c->count) {
             if (c->total) {
@@ -155,7 +194,7 @@ coverage_clear(void)
     size_t i;
 
     epoch++;
-    for (i = 0; i < coverage_n_counters; i++) {
+    for (i = 0; i < n_coverage_counters; i++) {
         struct coverage_counter *c = coverage_counters[i];
         c->total += c->count;
         c->count = 0;