diff mbox series

[v3,2/3] log: track log level changes

Message ID 20210409110453.20078-3-david.marchand@redhat.com (mailing list archive)
State Accepted
Delegated to: David Marchand
Headers show
Series Track log level changes | expand

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

David Marchand April 9, 2021, 11:04 a.m. UTC
Add a log message when registering log types and changing log levels.

__rte_log_register previous handled both legacy and dynamic logtypes.
To simplify the code, __rte_log_register is reworked to only handle
dynamic logtypes and takes a log level.

Example:
$ DPDK_TEST=logs_autotest ./build/app/test/dpdk-test --no-huge -m 512 \
  --log-level=lib.eal:debug
...
RTE>>logs_autotest
== dynamic log types
EAL: logtype1 logtype level changed from disabled to info
EAL: logtype2 logtype level changed from disabled to info
EAL: logtype1 logtype level changed from info to error
EAL: logtype3 logtype level changed from error to emerg
EAL: logtype2 logtype level changed from info to emerg
EAL: logtype3 logtype level changed from emerg to debug
EAL: logtype1 logtype level changed from error to debug
EAL: logtype2 logtype level changed from emerg to debug
error message
critical message
critical message
error message
== static log types
TESTAPP1: error message
TESTAPP1: critical message
TESTAPP2: critical message
TESTAPP1: error message
Test OK

Suggested-by: Ilya Maximets <i.maximets@ovn.org>
Signed-off-by: David Marchand <david.marchand@redhat.com>
Acked-by: Andrew Rybchenko <arybchenko@solarflare.com>
Acked-by: Lukasz Wojciechowski <l.wojciechow@partner.samsung.com>
---
Changes since v2:
- rebased on Thomas changes,
- updated log level change message,

Changes since v1:
- updated commitlog,

---
 lib/librte_eal/common/eal_common_log.c | 79 +++++++++++++-------------
 1 file changed, 41 insertions(+), 38 deletions(-)

Comments

Thomas Monjalon April 9, 2021, 11:59 a.m. UTC | #1
09/04/2021 13:04, David Marchand:
> Add a log message when registering log types and changing log levels.
> 
> __rte_log_register previous handled both legacy and dynamic logtypes.
> To simplify the code, __rte_log_register is reworked to only handle
> dynamic logtypes and takes a log level.
> 
> Example:
> $ DPDK_TEST=logs_autotest ./build/app/test/dpdk-test --no-huge -m 512 \
>   --log-level=lib.eal:debug
> ...
> RTE>>logs_autotest
> == dynamic log types
> EAL: logtype1 logtype level changed from disabled to info
> EAL: logtype2 logtype level changed from disabled to info
> EAL: logtype1 logtype level changed from info to error
> EAL: logtype3 logtype level changed from error to emerg
> EAL: logtype2 logtype level changed from info to emerg
> EAL: logtype3 logtype level changed from emerg to debug
> EAL: logtype1 logtype level changed from error to debug
> EAL: logtype2 logtype level changed from emerg to debug

This needs to be updated: logtype -> log

> error message
> critical message
> critical message
> error message
> == static log types
> TESTAPP1: error message
> TESTAPP1: critical message
> TESTAPP2: critical message
> TESTAPP1: error message
> Test OK
> 
> Suggested-by: Ilya Maximets <i.maximets@ovn.org>
> Signed-off-by: David Marchand <david.marchand@redhat.com>
> Acked-by: Andrew Rybchenko <arybchenko@solarflare.com>
> Acked-by: Lukasz Wojciechowski <l.wojciechow@partner.samsung.com>

Acked-by: Thomas Monjalon <thomas@monjalon.net>
David Marchand April 9, 2021, 12:14 p.m. UTC | #2
On Fri, Apr 9, 2021 at 1:59 PM Thomas Monjalon <thomas@monjalon.net> wrote:
>
> 09/04/2021 13:04, David Marchand:
> > Add a log message when registering log types and changing log levels.
> >
> > __rte_log_register previous handled both legacy and dynamic logtypes.
> > To simplify the code, __rte_log_register is reworked to only handle
> > dynamic logtypes and takes a log level.
> >
> > Example:
> > $ DPDK_TEST=logs_autotest ./build/app/test/dpdk-test --no-huge -m 512 \
> >   --log-level=lib.eal:debug
> > ...
> > RTE>>logs_autotest
> > == dynamic log types
> > EAL: logtype1 logtype level changed from disabled to info
> > EAL: logtype2 logtype level changed from disabled to info
> > EAL: logtype1 logtype level changed from info to error
> > EAL: logtype3 logtype level changed from error to emerg
> > EAL: logtype2 logtype level changed from info to emerg
> > EAL: logtype3 logtype level changed from emerg to debug
> > EAL: logtype1 logtype level changed from error to debug
> > EAL: logtype2 logtype level changed from emerg to debug
>
> This needs to be updated: logtype -> log

I refreshed patch 3 commitlog too.
Thanks.
diff mbox series

Patch

diff --git a/lib/librte_eal/common/eal_common_log.c b/lib/librte_eal/common/eal_common_log.c
index 4c1d514770..bed83a402a 100644
--- a/lib/librte_eal/common/eal_common_log.c
+++ b/lib/librte_eal/common/eal_common_log.c
@@ -135,6 +135,21 @@  rte_log_can_log(uint32_t logtype, uint32_t level)
 	return true;
 }
 
+static void
+logtype_set_level(uint32_t type, uint32_t level)
+{
+	uint32_t current = rte_logs.dynamic_types[type].loglevel;
+
+	if (current != level) {
+		rte_logs.dynamic_types[type].loglevel = level;
+		RTE_LOG(DEBUG, EAL, "%s log level changed from %s to %s\n",
+			rte_logs.dynamic_types[type].name == NULL ?
+				"" : rte_logs.dynamic_types[type].name,
+			eal_log_level2str(current),
+			eal_log_level2str(level));
+	}
+}
+
 int
 rte_log_set_level(uint32_t type, uint32_t level)
 {
@@ -143,7 +158,7 @@  rte_log_set_level(uint32_t type, uint32_t level)
 	if (level > RTE_LOG_MAX)
 		return -1;
 
-	rte_logs.dynamic_types[type].loglevel = level;
+	logtype_set_level(type, level);
 
 	return 0;
 }
@@ -166,7 +181,7 @@  rte_log_set_level_regexp(const char *regex, uint32_t level)
 			continue;
 		if (regexec(&r, rte_logs.dynamic_types[i].name, 0,
 				NULL, 0) == 0)
-			rte_logs.dynamic_types[i].loglevel = level;
+			logtype_set_level(i, level);
 	}
 
 	regfree(&r);
@@ -227,7 +242,7 @@  rte_log_set_level_pattern(const char *pattern, uint32_t level)
 			continue;
 
 		if (fnmatch(pattern, rte_logs.dynamic_types[i].name, 0) == 0)
-			rte_logs.dynamic_types[i].loglevel = level;
+			logtype_set_level(i, level);
 	}
 
 	return 0;
@@ -266,29 +281,11 @@  log_lookup(const char *name)
 	return -1;
 }
 
-/* register an extended log type, assuming table is large enough, and id
- * is not yet registered.
- */
 static int
-log_register(const char *name, int id)
-{
-	char *dup_name = strdup(name);
-
-	if (dup_name == NULL)
-		return -ENOMEM;
-
-	rte_logs.dynamic_types[id].name = dup_name;
-	rte_logs.dynamic_types[id].loglevel = RTE_LOG_INFO;
-
-	return id;
-}
-
-/* register an extended log type */
-int
-rte_log_register(const char *name)
+log_register(const char *name, uint32_t level)
 {
 	struct rte_log_dynamic_type *new_dynamic_types;
-	int id, ret;
+	int id;
 
 	id = log_lookup(name);
 	if (id >= 0)
@@ -301,13 +298,24 @@  rte_log_register(const char *name)
 		return -ENOMEM;
 	rte_logs.dynamic_types = new_dynamic_types;
 
-	ret = log_register(name, rte_logs.dynamic_types_len);
-	if (ret < 0)
-		return ret;
+	id = rte_logs.dynamic_types_len;
+	memset(&rte_logs.dynamic_types[id], 0,
+		sizeof(rte_logs.dynamic_types[id]));
+	rte_logs.dynamic_types[id].name = strdup(name);
+	if (rte_logs.dynamic_types[id].name == NULL)
+		return -ENOMEM;
+	logtype_set_level(id, level);
 
 	rte_logs.dynamic_types_len++;
 
-	return ret;
+	return id;
+}
+
+/* register an extended log type */
+int
+rte_log_register(const char *name)
+{
+	return log_register(name, RTE_LOG_INFO);
 }
 
 /* Register an extended log type and try to pick its level from EAL options */
@@ -316,11 +324,6 @@  rte_log_register_type_and_pick_level(const char *name, uint32_t level_def)
 {
 	struct rte_eal_opt_loglevel *opt_ll;
 	uint32_t level = level_def;
-	int type;
-
-	type = rte_log_register(name);
-	if (type < 0)
-		return type;
 
 	TAILQ_FOREACH(opt_ll, &opt_loglevel_list, next) {
 		if (opt_ll->level > RTE_LOG_MAX)
@@ -335,9 +338,7 @@  rte_log_register_type_and_pick_level(const char *name, uint32_t level_def)
 		}
 	}
 
-	rte_logs.dynamic_types[type].loglevel = level;
-
-	return type;
+	return log_register(name, level);
 }
 
 struct logtype {
@@ -390,9 +391,11 @@  RTE_INIT_PRIO(log_init, LOG)
 		return;
 
 	/* register legacy log types */
-	for (i = 0; i < RTE_DIM(logtype_strings); i++)
-		log_register(logtype_strings[i].logtype,
-				logtype_strings[i].log_id);
+	for (i = 0; i < RTE_DIM(logtype_strings); i++) {
+		rte_logs.dynamic_types[logtype_strings[i].log_id].name =
+			strdup(logtype_strings[i].logtype);
+		logtype_set_level(logtype_strings[i].log_id, RTE_LOG_INFO);
+	}
 
 	rte_logs.dynamic_types_len = RTE_LOGTYPE_FIRST_EXT_ID;
 }