[PATCH v4 2/3] eal: add cpuset lcore telemetry entries

[Kevin Laatz <kevin.laatz@intel.com>]

From: Anatoly Burakov <anatoly.burakov@intel.com>

Expose per-lcore cpuset information to telemetry.

Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
---
 lib/eal/common/eal_common_lcore_telemetry.c | 47 +++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/lib/eal/common/eal_common_lcore_telemetry.c b/lib/eal/common/eal_common_lcore_telemetry.c
index 540ac5eba0..976a615d4e 100644
--- a/lib/eal/common/eal_common_lcore_telemetry.c
+++ b/lib/eal/common/eal_common_lcore_telemetry.c
@@ -19,6 +19,8 @@ rte_atomic32_t __rte_lcore_telemetry_enabled;
 
 #ifdef RTE_LCORE_POLL_BUSYNESS
 
+#include "eal_private.h"
+
 struct lcore_telemetry {
 	int poll_busyness;
 	/**< Calculated poll busyness (gets set/returned by the API) */
@@ -247,6 +249,48 @@ lcore_handle_poll_busyness(const char *cmd __rte_unused,
 	return 0;
 }
 
+static int
+lcore_handle_cpuset(const char *cmd __rte_unused,
+		    const char *params __rte_unused,
+		    struct rte_tel_data *d)
+{
+	char corenum[64];
+	int i;
+
+	rte_tel_data_start_dict(d);
+
+	RTE_LCORE_FOREACH(i) {
+		const struct lcore_config *cfg = &lcore_config[i];
+		const rte_cpuset_t *cpuset = &cfg->cpuset;
+		struct rte_tel_data *ld;
+		unsigned int cpu;
+
+		if (!rte_lcore_is_enabled(i))
+			continue;
+
+		/* create an array of integers */
+		ld = rte_tel_data_alloc();
+		if (ld == NULL)
+			return -ENOMEM;
+		rte_tel_data_start_array(ld, RTE_TEL_INT_VAL);
+
+		/* add cpu ID's from cpuset to the array */
+		for (cpu = 0; cpu < CPU_SETSIZE; cpu++) {
+			if (!CPU_ISSET(cpu, cpuset))
+				continue;
+			rte_tel_data_add_array_int(ld, cpu);
+		}
+
+		/* add array to the per-lcore container */
+		snprintf(corenum, sizeof(corenum), "%d", i);
+
+		/* tell telemetry library to free this array automatically */
+		rte_tel_data_add_dict_container(d, corenum, ld, 0);
+	}
+
+	return 0;
+}
+
 void
 rte_lcore_telemetry_free(void)
 {
@@ -274,6 +318,9 @@ RTE_INIT(lcore_init_telemetry)
 
 	rte_telemetry_register_cmd("/eal/lcore/poll_busyness_disable", lcore_poll_busyness_disable,
 				   "disable lcore poll busyness measurement");
+
+	rte_telemetry_register_cmd("/eal/lcore/cpuset", lcore_handle_cpuset,
+				   "list physical core affinity for each lcore");
 }
 
 #else
-- 
2.31.1