diff options
Diffstat (limited to 'lib/coverage.c')
-rw-r--r-- | lib/coverage.c | 91 |
1 files changed, 58 insertions, 33 deletions
diff --git a/lib/coverage.c b/lib/coverage.c index ff20f5e9..ee27af02 100644 --- a/lib/coverage.c +++ b/lib/coverage.c @@ -20,6 +20,7 @@ #include <stdlib.h> #include "dynamic-string.h" #include "hash.h" +#include "svec.h" #include "timeval.h" #include "unixctl.h" #include "util.h" @@ -48,19 +49,28 @@ struct coverage_counter *coverage_counters[] = { static unsigned int epoch; +static void coverage_read(struct svec *); + static void -coverage_unixctl_log(struct unixctl_conn *conn, int argc OVS_UNUSED, +coverage_unixctl_show(struct unixctl_conn *conn, int argc OVS_UNUSED, const char *argv[] OVS_UNUSED, void *aux OVS_UNUSED) { - coverage_log(VLL_WARN, false); - unixctl_command_reply(conn, NULL); + struct svec lines; + char *reply; + + svec_init(&lines); + coverage_read(&lines); + reply = svec_join(&lines, "\n", "\n"); + unixctl_command_reply(conn, reply); + free(reply); + svec_destroy(&lines); } void coverage_init(void) { - unixctl_command_register("coverage/log", "", 0, 0, - coverage_unixctl_log, NULL); + unixctl_command_register("coverage/show", "", 0, 0, + coverage_unixctl_show, NULL); } /* Sorts coverage counters in descending order by count, within equal counts @@ -144,60 +154,75 @@ coverage_hit(uint32_t hash) } } +/* Logs the coverage counters, unless a similar set of events has already been + * logged. + * + * This function logs at log level VLL_INFO. Use care before adjusting this + * level, because depending on its configuration, syslogd can write changes + * synchronously, which can cause the coverage messages to take several seconds + * to write. */ +void +coverage_log(void) +{ + static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 3); + + if (!VLOG_DROP_INFO(&rl)) { + uint32_t hash = coverage_hash(); + if (coverage_hit(hash)) { + VLOG_INFO("Skipping details of duplicate event coverage for " + "hash=%08"PRIx32" in epoch %u", hash, epoch); + } else { + struct svec lines; + const char *line; + size_t i; + + svec_init(&lines); + coverage_read(&lines); + SVEC_FOR_EACH (i, line, &lines) { + VLOG_INFO("%s", line); + } + svec_destroy(&lines); + } + } +} + static void -coverage_log_counter(enum vlog_level level, const struct coverage_counter *c) +coverage_read_counter(struct svec *lines, const struct coverage_counter *c) { - VLOG(level, "%-24s %5u / %9llu", c->name, c->count, c->count + c->total); + svec_add_nocopy(lines, xasprintf("%-24s %5u / %9llu", + c->name, c->count, c->count + c->total)); } -/* 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, bool suppress_dups) +/* Adds coverage counter information to 'lines'. */ +static void +coverage_read(struct svec *lines) { - static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 3); size_t n_never_hit; uint32_t hash; size_t i; - if (suppress_dups - ? !vlog_is_enabled(THIS_MODULE, level) - : vlog_should_drop(THIS_MODULE, level, &rl)) { - return; - } - hash = coverage_hash(); - 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); + svec_add_nocopy(lines, xasprintf("Event coverage (epoch %u/entire run), " + "hash=%08"PRIx32":", epoch, hash)); for (i = 0; i < n_coverage_counters; i++) { struct coverage_counter *c = coverage_counters[i]; if (c->count) { - coverage_log_counter(level, c); + coverage_read_counter(lines, c); } } for (i = 0; i < n_coverage_counters; i++) { struct coverage_counter *c = coverage_counters[i]; if (!c->count) { if (c->total) { - coverage_log_counter(level, c); + coverage_read_counter(lines, c); } else { n_never_hit++; } } } - VLOG(level, "%zu events never hit", n_never_hit); + svec_add_nocopy(lines, xasprintf("%zu events never hit", n_never_hit)); } /* Advances to the next epoch of coverage, resetting all the counters to 0. */ |