Integrate irq mode into PROX (support display and command line)

irq mode can be used to show how a core is interrupted by other tasks.
This mode does not handle packets. It only loops reading tsc.
When the difference between two consecutive calls to rdtsc() is high
then it means the core was interrupted.
This task implementes the display, so that we can see a histogram of
interrupts as well as the maximum, per core.
Command line is also supported, through "show irq buckets" (too show
the intervals of each buckets, in micrcoseconds), and the stats
command line (showing the number of items in each buckets and the max)..

Change-Id: I153cc3deaa7b86ae2776ea44e46ef9ecfd116992
Signed-off-by: Xavier Simonart <xavier.simonart@intel.com>

1 files changed, 144 insertions, 0 deletions

diff --git a/VNFs/DPPD-PROX/stats_irq.c b/VNFs/DPPD-PROX/stats_irq.c
new file mode 100644
index 00000000..cd1b78d7
--- /dev/null
+++ b/VNFs/DPPD-PROX/stats_irq.c
@@ -0,0 +1,144 @@
+/*
+// Copyright (c) 2010-2018 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#include <stddef.h>
+
+#include "handle_irq.h"
+#include "stats_irq.h"
+#include "prox_cfg.h"
+#include "prox_globals.h"
+#include "lconf.h"
+
+static struct irq_task_stats   irq_task_stats_set[RTE_MAX_LCORE * MAX_TASKS_PER_CORE];
+static uint8_t nb_irq_tasks;
+
+int stats_get_n_irq_tasks(void)
+{
+        return nb_irq_tasks;
+}
+
+struct irq_sample *get_irq_sample(uint32_t task_id, int l)
+{
+	return &irq_task_stats_set[task_id].sample[last_stat == l];
+}
+
+struct irq_sample *get_irq_sample_by_core_task(uint32_t lcore_id, uint32_t irq_task_id, int l)
+{
+	for (uint8_t task_id = 0; task_id < nb_irq_tasks; ++task_id) {
+		if ((irq_task_stats_set[task_id].lcore_id == lcore_id) && (irq_task_stats_set[task_id].task_id == irq_task_id))
+			return &irq_task_stats_set[task_id].sample[last_stat == l];
+	}
+	return NULL;
+}
+
+void stats_irq_reset(void)
+{
+	struct irq_task_stats *cur_task_stats;
+
+	for (uint8_t task_id = 0; task_id < nb_irq_tasks; ++task_id) {
+		cur_task_stats = &irq_task_stats_set[task_id];
+		cur_task_stats->max_irq = 0;
+		for (uint i = 0; i < IRQ_BUCKETS_COUNT; ++i) {
+			cur_task_stats->irq[i] = 0;
+		}
+	}
+}
+
+void stats_irq_post_proc(void)
+{
+	for (uint8_t task_id = 0; task_id < nb_irq_tasks; ++task_id) {
+		struct irq_task_stats *cur_task_stats = &irq_task_stats_set[task_id];
+		struct irq_rt_stats *stats = cur_task_stats->stats;
+		const struct irq_sample *last = &cur_task_stats->sample[last_stat];
+		const struct irq_sample *prev = &cur_task_stats->sample[!last_stat];
+
+		if (cur_task_stats->max_irq < last->max_irq)
+			cur_task_stats->max_irq = last->max_irq;
+		for (uint i = 0; i < IRQ_BUCKETS_COUNT; ++i) {
+			cur_task_stats->irq[i] += last->irq[i] - prev->irq[i];
+		}
+		stats->max_irq = 0;
+	}
+}
+
+void stats_irq_update(void)
+{
+	for (uint8_t task_id = 0; task_id < nb_irq_tasks; ++task_id) {
+		struct irq_task_stats *cur_task_stats = &irq_task_stats_set[task_id];
+		struct irq_rt_stats *stats = cur_task_stats->stats;
+		struct irq_sample *sample = &cur_task_stats->sample[last_stat];
+
+		sample->max_irq = stats->max_irq;
+		for (uint i = 0; i < IRQ_BUCKETS_COUNT; ++i) {
+			sample->irq[i] = stats->irq[i];
+		}
+	}
+}
+
+void stats_irq_init(void)
+{
+	struct lcore_cfg *lconf;
+	uint32_t lcore_id;
+
+	lcore_id = -1;
+	while(prox_core_next(&lcore_id, 0) == 0) {
+		lconf = &lcore_cfg[lcore_id];
+		for (uint8_t task_id = 0; task_id < lconf->n_tasks_all; ++task_id) {
+			struct task_args *targ = &lconf->targs[task_id];
+			if (strcmp(targ->task_init->mode_str, "irq") == 0) {
+				struct irq_rt_stats *stats = &((struct task_irq *)(lconf->tasks_all[task_id]))->stats;
+				irq_task_stats_set[nb_irq_tasks].stats = stats;
+				irq_task_stats_set[nb_irq_tasks].lcore_id = lcore_id;
+				irq_task_stats_set[nb_irq_tasks++].task_id = task_id;
+			}
+		}
+	}
+}
+
+uint64_t get_max_irq_stats_by_core_task(uint8_t lcore_id, uint8_t irq_task_id)
+{
+	for (uint8_t task_id = 0; task_id < nb_irq_tasks; ++task_id) {
+		if ((irq_task_stats_set[task_id].lcore_id == lcore_id) && (irq_task_stats_set[task_id].task_id == irq_task_id))
+			return (irq_task_stats_set[task_id].max_irq * 1000000) / rte_get_tsc_hz();
+	}
+	return -1;
+}
+
+uint64_t get_irq_stats_by_core_task(uint8_t lcore_id, uint8_t irq_task_id, int id)
+{
+	for (uint8_t task_id = 0; task_id < nb_irq_tasks; ++task_id) {
+		if ((irq_task_stats_set[task_id].lcore_id == lcore_id) && (irq_task_stats_set[task_id].task_id == irq_task_id))
+			return irq_task_stats_set[task_id].irq[id];
+	}
+	return -1;
+}
+
+uint64_t get_max_irq_stats(uint8_t task_id)
+{
+	return (irq_task_stats_set[task_id].max_irq * 1000000L) / rte_get_tsc_hz();
+}
+
+uint64_t get_irq_stats(uint8_t task_id, int bucket_id)
+{
+	return irq_task_stats_set[task_id].irq[bucket_id];
+}
+void get_irq_buckets_by_core_task(char *buf, uint8_t lcore_id, uint8_t irq_task_id)
+{
+	for (int i = 0; i < IRQ_BUCKETS_COUNT; i++) {
+		sprintf(buf+strlen(buf), "%ld; ", irq_bucket_maxtime_micro[i]);
+	}
+	sprintf(buf+strlen(buf), "\n");
+}