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, 160 insertions, 0 deletions

diff --git a/VNFs/DPPD-PROX/display_irq.c b/VNFs/DPPD-PROX/display_irq.c
new file mode 100644
index 00000000..5cf347d7
--- /dev/null
+++ b/VNFs/DPPD-PROX/display_irq.c
@@ -0,0 +1,160 @@
+/*
+// 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 "display_irq.h"
+#include "stats_irq.h"
+#include "display.h"
+#include "lconf.h"
+
+static struct display_page display_page_irq;
+static struct display_column *stats_irq[IRQ_BUCKETS_COUNT];
+static struct display_column *stats_max;
+static struct display_column *core_col;
+static struct display_column *name_col;
+
+static void display_irq_draw_frame(struct screen_state *state)
+{
+  	uint32_t n_tasks = stats_get_n_irq_tasks();
+	struct lcore_cfg *lconf = NULL;
+	struct task_args *targ;
+	char name[32];
+	char *ptr;
+
+	display_page_init(&display_page_irq);
+
+	struct display_table *core_name = display_page_add_table(&display_page_irq);
+
+	display_table_init(core_name, "Core/task");
+	core_col = display_table_add_col(core_name);
+	name_col = display_table_add_col(core_name);
+	display_column_init(core_col, "Nb", 4);
+	display_column_init(name_col, "Name", 5);
+
+	struct display_table *stats = display_page_add_table(&display_page_irq);
+	if (state->toggle == 0) {
+		display_table_init(stats, "Statistics per second");
+
+		char title[64];
+		stats_max = display_table_add_col(stats);
+		snprintf(title, sizeof(title), " MAXIMUM(mic)");
+		display_column_init(stats_max, title, 11);
+
+		stats_irq[0] = display_table_add_col(stats);
+		if (irq_bucket_maxtime_micro[0] < 1000)
+			snprintf(title, sizeof(title), " %d-%ld mic", 0, irq_bucket_maxtime_micro[0]);
+		else
+			snprintf(title, sizeof(title), " %d-%ld ms", 0, irq_bucket_maxtime_micro[0] / 1000);
+		display_column_init(stats_irq[0], title, 9);
+		for (uint i = 1; i < IRQ_BUCKETS_COUNT - 1; ++i) {
+			stats_irq[i] = display_table_add_col(stats);
+			if (irq_bucket_maxtime_micro[i-1] < 1000)
+				snprintf(title, sizeof(title), " %ld-%ld mic", irq_bucket_maxtime_micro[i-1], irq_bucket_maxtime_micro[i]);
+			else
+				snprintf(title, sizeof(title), " %ld-%ld ms", irq_bucket_maxtime_micro[i-1] / 1000, irq_bucket_maxtime_micro[i] / 1000);
+			display_column_init(stats_irq[i], title, 9);
+		}
+		stats_irq[IRQ_BUCKETS_COUNT - 1] = display_table_add_col(stats);
+		if (irq_bucket_maxtime_micro[IRQ_BUCKETS_COUNT - 2] < 1000)
+			snprintf(title, sizeof(title), "  > %ld mic ", irq_bucket_maxtime_micro[IRQ_BUCKETS_COUNT - 2]);
+		else
+			snprintf(title, sizeof(title), " > %ld ms   ", irq_bucket_maxtime_micro[IRQ_BUCKETS_COUNT - 2] / 1000);
+		display_column_init(stats_irq[IRQ_BUCKETS_COUNT - 1], title, 9);
+	} else {
+		display_table_init(stats, "Total statistics");
+
+		char title[64];
+		stats_max = display_table_add_col(stats);
+		snprintf(title, sizeof(title), " MAXIMUM(mic)");
+		display_column_init(stats_max, title, 9);
+
+		stats_irq[0] = display_table_add_col(stats);
+		if (irq_bucket_maxtime_micro[0] < 1000)
+			snprintf(title, sizeof(title), " %d-%ld   ", 0, irq_bucket_maxtime_micro[0]);
+		else
+			snprintf(title, sizeof(title), " %d-%ld ms", 0, irq_bucket_maxtime_micro[0] / 1000);
+		display_column_init(stats_irq[0], title, 9);
+		for (uint i = 1; i < IRQ_BUCKETS_COUNT - 1; ++i) {
+			stats_irq[i] = display_table_add_col(stats);
+			if (irq_bucket_maxtime_micro[i-1] < 1000)
+				snprintf(title, sizeof(title), " %ld-%ld  ", irq_bucket_maxtime_micro[i-1], irq_bucket_maxtime_micro[i]);
+			else
+				snprintf(title, sizeof(title), " %ld-%ld ms", irq_bucket_maxtime_micro[i-1] / 1000, irq_bucket_maxtime_micro[i] / 1000);
+			display_column_init(stats_irq[i], title, 9);
+		}
+		stats_irq[IRQ_BUCKETS_COUNT - 1] = display_table_add_col(stats);
+		if (irq_bucket_maxtime_micro[IRQ_BUCKETS_COUNT - 2] < 1000)
+			snprintf(title, sizeof(title), " > %ld ", irq_bucket_maxtime_micro[IRQ_BUCKETS_COUNT - 2]);
+		else
+			snprintf(title, sizeof(title), " > %ld  ", irq_bucket_maxtime_micro[IRQ_BUCKETS_COUNT - 2] / 1000);
+		display_column_init(stats_irq[IRQ_BUCKETS_COUNT - 1], title, 9);
+	}
+
+	display_page_draw_frame(&display_page_irq, n_tasks);
+
+	uint32_t count = 0;
+	lconf = NULL;
+	while (core_targ_next(&lconf, &targ, 0) == 0) {
+		if (strcmp(targ->task_init->mode_str, "irq") == 0) {
+			display_column_print_core_task(core_col, count, lconf, targ);
+			if (targ->id == 0)
+				display_column_print(name_col, count, "%s", lconf->name);
+			count++;
+		}
+	}
+}
+
+static void display_irq_draw_stats(struct screen_state *state)
+{
+	struct lcore_cfg *lconf = NULL;
+	struct task_args *targ;
+	const uint32_t n_stats_irq = stats_get_n_irq_tasks();
+
+	if (state->toggle == 0) {
+		for (uint32_t count = 0; count < n_stats_irq; ++count) {
+			struct irq_sample *last = get_irq_sample(count, 1);
+			struct irq_sample *prev = get_irq_sample(count, 0);
+
+			display_column_print(stats_max, count, "%9lu", (last->max_irq * 1000000L) / rte_get_tsc_hz());
+			for (uint i = 0; i < IRQ_BUCKETS_COUNT; ++i) {
+				display_column_print(stats_irq[i], count, "%9lu", last->irq[i] - prev->irq[i]);
+			}
+		}
+	} else {
+		for (uint32_t count = 0; count < n_stats_irq; ++count) {
+			display_column_print(stats_max, count, "%9lu", get_max_irq_stats(count));
+			for (uint i = 0; i < IRQ_BUCKETS_COUNT; ++i) {
+				display_column_print(stats_irq[i], count, "%9lu", get_irq_stats(count, i));
+			}
+		}
+	}
+}
+
+static int display_irq_get_height(void)
+{
+	return stats_get_n_irq_tasks();
+}
+
+static struct display_screen display_screen_irq = {
+	.draw_frame = display_irq_draw_frame,
+	.draw_stats = display_irq_draw_stats,
+	.get_height = display_irq_get_height,
+	.title = "irq",
+};
+
+struct display_screen *display_irq(void)
+{
+	return &display_screen_irq;
+}