Change in osmo-mgw[master]: mgcp_ratectr: add stats items to monitor trunk usage

dexter gerrit-no-reply at lists.osmocom.org
Wed Jul 21 09:13:22 UTC 2021


dexter has submitted this change. ( https://gerrit.osmocom.org/c/osmo-mgw/+/24942 )

Change subject: mgcp_ratectr: add stats items to monitor trunk usage
......................................................................

mgcp_ratectr: add stats items to monitor trunk usage

We are currently counting events in rate counters, but there is
currently no way to get a sample of the current situation of the trunk
usage. In particular how many endpoints are currently in use.

Change-Id: Ib7b654168dc3512f55e45cc4755dc1f6f423d023
Related: SYS#5535
---
M include/osmocom/mgcp/mgcp_ratectr.h
M include/osmocom/mgcp/mgcp_trunk.h
M src/libosmo-mgcp/mgcp_endp.c
M src/libosmo-mgcp/mgcp_ratectr.c
M src/libosmo-mgcp/mgcp_trunk.c
M tests/mgcp/mgcp_test.c
6 files changed, 94 insertions(+), 21 deletions(-)

Approvals:
  Jenkins Builder: Verified
  pespin: Looks good to me, but someone else must approve
  daniel: Looks good to me, approved



diff --git a/include/osmocom/mgcp/mgcp_ratectr.h b/include/osmocom/mgcp/mgcp_ratectr.h
index 78c687b..0bd6f88 100644
--- a/include/osmocom/mgcp/mgcp_ratectr.h
+++ b/include/osmocom/mgcp/mgcp_ratectr.h
@@ -95,3 +95,17 @@
 
 int mgcp_ratectr_global_alloc(struct mgcp_config *cfg);
 int mgcp_ratectr_trunk_alloc(struct mgcp_trunk *trunk);
+
+/* Trunk-global common stat items */
+enum {
+	TRUNK_STAT_ENDPOINTS_TOTAL,
+	TRUNK_STAT_ENDPOINTS_USED,
+};
+
+struct mgcp_stat_trunk {
+	/* Stat item group which contains general status values of the trunk. */
+	struct osmo_stat_item_group *common;
+};
+
+int mgcp_stat_trunk_alloc(struct mgcp_trunk *trunk);
+
diff --git a/include/osmocom/mgcp/mgcp_trunk.h b/include/osmocom/mgcp/mgcp_trunk.h
index 048ac5b..d960428 100644
--- a/include/osmocom/mgcp/mgcp_trunk.h
+++ b/include/osmocom/mgcp/mgcp_trunk.h
@@ -52,8 +52,9 @@
 	unsigned int number_endpoints;
 	struct mgcp_endpoint **endpoints;
 
-	/* global rate counters to measure the trunks overall performance and health */
+	/* rate counters and stat items to measure the trunks overall performance and health */
 	struct mgcp_ratectr_trunk ratectr;
+	struct mgcp_stat_trunk stats;
 
 	union {
 		/* Virtual trunk specific */
diff --git a/src/libosmo-mgcp/mgcp_endp.c b/src/libosmo-mgcp/mgcp_endp.c
index ae376b0..7df4a80 100644
--- a/src/libosmo-mgcp/mgcp_endp.c
+++ b/src/libosmo-mgcp/mgcp_endp.c
@@ -29,6 +29,7 @@
 
 #include <osmocom/abis/e1_input.h>
 #include <osmocom/mgcp/mgcp_e1.h>
+#include <osmocom/core/stat_item.h>
 
 #define E1_RATE_MAX 64
 #define E1_OFFS_MAX 8
@@ -122,6 +123,12 @@
 	 * RSIP is executed), free them all at once. */
 	mgcp_conn_free_all(endp);
 
+	/* We must only decrement the stat item when the endpoint as actually
+	 * claimed. An endpoint is claimed when a call-id is set */
+	if (endp->callid)
+		osmo_stat_item_dec(osmo_stat_item_group_get_item(endp->trunk->stats.common,
+								 TRUNK_STAT_ENDPOINTS_USED), 1);
+
 	/* Reset endpoint parameters and states */
 	talloc_free(endp->callid);
 	endp->callid = NULL;
@@ -631,6 +638,8 @@
 	 * connection ids) */
 	endp->callid = talloc_strdup(endp, callid);
 	OSMO_ASSERT(endp->callid);
+	osmo_stat_item_inc(osmo_stat_item_group_get_item(endp->trunk->stats.common,
+							 TRUNK_STAT_ENDPOINTS_USED), 1);
 
 	/* Allocate resources */
 	switch (endp->trunk->trunk_type) {
diff --git a/src/libosmo-mgcp/mgcp_ratectr.c b/src/libosmo-mgcp/mgcp_ratectr.c
index 1f8b233..740a3b0 100644
--- a/src/libosmo-mgcp/mgcp_ratectr.c
+++ b/src/libosmo-mgcp/mgcp_ratectr.c
@@ -24,8 +24,11 @@
 
 #include <errno.h>
 #include <osmocom/core/stats.h>
+#include <osmocom/core/stat_item.h>
 #include <osmocom/mgcp/mgcp_conn.h>
 #include <osmocom/mgcp/mgcp_trunk.h>
+#include <osmocom/mgcp/mgcp_protocol.h>
+#include <osmocom/mgcp/mgcp_endp.h>
 #include <osmocom/mgcp/mgcp_ratectr.h>
 
 static const struct rate_ctr_desc mgcp_general_ctr_desc[] = {
@@ -248,3 +251,41 @@
 	}
 	return 0;
 }
+
+const struct osmo_stat_item_desc trunk_stat_desc[] = {
+	[TRUNK_STAT_ENDPOINTS_TOTAL] = { "endpoints:total",
+					 "Number of endpoints that exist on the trunk",
+					 "", 60, 0 },
+	[TRUNK_STAT_ENDPOINTS_USED] = { "endpoints:used",
+					"Number of endpoints in use",
+					"", 60, 0 },
+};
+
+const struct osmo_stat_item_group_desc trunk_statg_desc = {
+	.group_name_prefix = "trunk",
+	.group_description = "mgw trunk",
+	.class_id = OSMO_STATS_CLASS_GLOBAL,
+	.num_items = ARRAY_SIZE(trunk_stat_desc),
+	.item_desc = trunk_stat_desc,
+};
+
+/*! allocate trunk specific stat items
+ *  (called once on trunk initialization).
+ *  \param[in] trunk for which the stat items are allocated.
+ *  \returns 0 on success, -EINVAL on failure. */
+int mgcp_stat_trunk_alloc(struct mgcp_trunk *trunk)
+{
+	struct mgcp_stat_trunk *stats = &trunk->stats;
+	static unsigned int common_stat_index = 0;
+	char stat_name[256];
+
+	stats->common = osmo_stat_item_group_alloc(trunk, &trunk_statg_desc, common_stat_index);
+	if (!stats->common)
+		return -EINVAL;
+	snprintf(stat_name, sizeof(stat_name), "%s-%u:common", mgcp_trunk_type_strs_str(trunk->trunk_type),
+		 trunk->trunk_nr);
+	osmo_stat_item_group_set_name(stats->common, stat_name);
+	common_stat_index++;
+
+	return 0;
+}
diff --git a/src/libosmo-mgcp/mgcp_trunk.c b/src/libosmo-mgcp/mgcp_trunk.c
index 27663b4..b2d1969 100644
--- a/src/libosmo-mgcp/mgcp_trunk.c
+++ b/src/libosmo-mgcp/mgcp_trunk.c
@@ -27,6 +27,7 @@
 #include <osmocom/mgcp/mgcp_trunk.h>
 #include <osmocom/mgcp/mgcp_e1.h>
 #include <osmocom/abis/e1_input.h>
+#include <osmocom/core/stat_item.h>
 
 const struct value_string mgcp_trunk_type_strs[] = {
 	{ MGCP_TRUNK_VIRTUAL,		"virtual" },
@@ -64,6 +65,7 @@
 	llist_add_tail(&trunk->entry, &cfg->trunks);
 
 	mgcp_ratectr_trunk_alloc(trunk);
+	mgcp_stat_trunk_alloc(trunk);
 
 	return trunk;
 }
@@ -127,7 +129,8 @@
 
 	/* make the endpoints we just created available to the MGW code */
 	trunk->number_endpoints = number_endpoints;
-
+	osmo_stat_item_set(osmo_stat_item_group_get_item(trunk->stats.common, TRUNK_STAT_ENDPOINTS_TOTAL),
+			   trunk->number_endpoints);
 	return 0;
 }
 
diff --git a/tests/mgcp/mgcp_test.c b/tests/mgcp/mgcp_test.c
index bcbcc02..26fcc2a 100644
--- a/tests/mgcp/mgcp_test.c
+++ b/tests/mgcp/mgcp_test.c
@@ -1065,20 +1065,20 @@
 	int i;
 	struct mgcp_endpoint endp;
 	struct mgcp_endpoint *endpoints[1];
-	struct mgcp_config cfg = {0};
-	struct mgcp_trunk trunk;
+	struct mgcp_config *cfg;
+	struct mgcp_trunk *trunk;
 
 	printf("Testing packet loss calculation.\n");
 
 	memset(&endp, 0, sizeof(endp));
-	memset(&trunk, 0, sizeof(trunk));
-
-	endp.cfg = &cfg;
+	cfg = mgcp_config_alloc();
+	trunk = mgcp_trunk_alloc(cfg, MGCP_TRUNK_VIRTUAL, MGCP_VIRT_TRUNK_ID);
+	endp.cfg = cfg;
 	endp.type = &ep_typeset.rtp;
-	trunk.v.vty_number_endpoints = 1;
-	trunk.endpoints = endpoints;
-	trunk.endpoints[0] = &endp;
-	endp.trunk = &trunk;
+	trunk->v.vty_number_endpoints = 1;
+	trunk->endpoints = endpoints;
+	trunk->endpoints[0] = &endp;
+	endp.trunk = trunk;
 	INIT_LLIST_HEAD(&endp.conns);
 
 	for (i = 0; i < ARRAY_SIZE(pl_test_dat); ++i) {
@@ -1116,6 +1116,8 @@
 		mgcp_conn_free_all(&endp);
 	}
 
+	talloc_free(trunk);
+	talloc_free(cfg);
 }
 
 int mgcp_parse_stats(struct msgb *msg, uint32_t *ps, uint32_t *os,
@@ -1297,10 +1299,10 @@
 {
 	int i;
 
-	struct mgcp_trunk trunk;
+	struct mgcp_trunk *trunk;
 	struct mgcp_endpoint endp;
 	struct mgcp_endpoint *endpoints[1];
-	struct mgcp_config cfg = {0};
+	struct mgcp_config *cfg;
 	struct mgcp_rtp_state state;
 	struct mgcp_rtp_end *rtp;
 	struct osmo_sockaddr addr = { 0 };
@@ -1318,7 +1320,8 @@
 	       patch_ssrc ? ", patch SSRC" : "",
 	       patch_ts ? ", patch timestamps" : "");
 
-	memset(&trunk, 0, sizeof(trunk));
+	cfg = mgcp_config_alloc();
+	trunk = mgcp_trunk_alloc(cfg, MGCP_TRUNK_VIRTUAL, MGCP_VIRT_TRUNK_ID);
 	memset(&endp, 0, sizeof(endp));
 	memset(&state, 0, sizeof(state));
 
@@ -1327,16 +1330,16 @@
 	state.in_stream.err_ts_ctr = &test_ctr_in;
 	state.out_stream.err_ts_ctr = &test_ctr_out;
 
-	endp.cfg = &cfg;
+	endp.cfg = cfg;
 	endp.type = &ep_typeset.rtp;
 
-	trunk.v.vty_number_endpoints = 1;
-	trunk.endpoints = endpoints;
-	trunk.endpoints[0] = &endp;
-	trunk.force_constant_ssrc = patch_ssrc;
-	trunk.force_aligned_timing = patch_ts;
+	trunk->v.vty_number_endpoints = 1;
+	trunk->endpoints = endpoints;
+	trunk->endpoints[0] = &endp;
+	trunk->force_constant_ssrc = patch_ssrc;
+	trunk->force_aligned_timing = patch_ts;
 
-	endp.trunk = &trunk;
+	endp.trunk = trunk;
 
 	INIT_LLIST_HEAD(&endp.conns);
 	_conn = mgcp_conn_alloc(NULL, &endp, MGCP_CONN_TYPE_RTP,
@@ -1395,6 +1398,8 @@
 
 	force_monotonic_time_us = -1;
 	mgcp_conn_free_all(&endp);
+	talloc_free(trunk);
+	talloc_free(cfg);
 }
 
 static void test_multilple_codec(void)

-- 
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Gerrit-Project: osmo-mgw
Gerrit-Branch: master
Gerrit-Change-Id: Ib7b654168dc3512f55e45cc4755dc1f6f423d023
Gerrit-Change-Number: 24942
Gerrit-PatchSet: 7
Gerrit-Owner: dexter <pmaier at sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: daniel <dwillmann at sysmocom.de>
Gerrit-Reviewer: dexter <pmaier at sysmocom.de>
Gerrit-Reviewer: laforge <laforge at osmocom.org>
Gerrit-Reviewer: pespin <pespin at sysmocom.de>
Gerrit-MessageType: merged
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