From a18023f67864841fbeee6c93e9c504768e652281 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Tue, 27 Aug 2013 23:51:32 +0100
Subject: [PATCH] overlay: Add number of running processes to CPU display

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 overlay/cpu-top.c |  7 ++++++-
 overlay/cpu-top.h |  1 +
 overlay/overlay.c | 19 ++++++++++++++++---
 3 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/overlay/cpu-top.c b/overlay/cpu-top.c
index c134d40..13ae70d 100644
--- a/overlay/cpu-top.c
+++ b/overlay/cpu-top.c
@@ -23,6 +23,7 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <string.h>
@@ -44,7 +45,7 @@ int cpu_top_update(struct cpu_top *cpu)
 	struct cpu_stat *s = &cpu->stat[cpu->count++&1];
 	struct cpu_stat *d = &cpu->stat[cpu->count&1];
 	uint64_t d_total, d_idle;
-	char buf[4096];
+	char buf[4096], *b;
 	int fd, len = -1;
 
 	fd = open("/proc/stat", 0);
@@ -66,6 +67,10 @@ int cpu_top_update(struct cpu_top *cpu)
 	       &s->user, &s->nice, &s->sys, &s->idle);
 #endif
 
+	b = strstr(buf, "procs_running");
+	if (b)
+		cpu->nr_running = atoi(b+sizeof("procs_running")) - 1;
+
 	s->total = s->user + s->nice + s->sys + s->idle;
 	if (cpu->count == 1)
 		return EAGAIN;
diff --git a/overlay/cpu-top.h b/overlay/cpu-top.h
index c91814f..a061a48 100644
--- a/overlay/cpu-top.h
+++ b/overlay/cpu-top.h
@@ -30,6 +30,7 @@
 struct cpu_top {
 	uint8_t busy;
 	int nr_cpu;
+	int nr_running;
 
 	int count;
 	struct cpu_stat {
diff --git a/overlay/overlay.c b/overlay/overlay.c
index d270f16..38c597e 100644
--- a/overlay/overlay.c
+++ b/overlay/overlay.c
@@ -183,6 +183,8 @@ static void show_gpu_top(struct overlay_context *ctx, struct overlay_gpu_top *gt
 	int y, y1, y2, n, update, len;
 	cairo_pattern_t *linear;
 	char txt[160];
+	int rewind;
+	int do_rewind;
 
 	update = gpu_top_update(&gt->gpu_top);
 
@@ -222,9 +224,20 @@ static void show_gpu_top(struct overlay_context *ctx, struct overlay_gpu_top *gt
 	y = PAD + 12 - 2;
 	cairo_set_source_rgba(ctx->cr, 0.75, 0.25, 0.75, 1.);
 	cairo_move_to(ctx->cr, PAD, y);
-	len = sprintf(txt, "CPU: %3d%% busy", gt->cpu_top.busy * gt->cpu_top.nr_cpu);
-	if (gt->cpu_top.nr_cpu)
-		sprintf(txt + len, " (%d cores)", gt->cpu_top.nr_cpu);
+	rewind = len = sprintf(txt, "CPU: %3d%% busy", gt->cpu_top.busy * gt->cpu_top.nr_cpu);
+	do_rewind = 1;
+	len += sprintf(txt + len, " (");
+	if (gt->cpu_top.nr_cpu > 1) {
+		len += sprintf(txt + len, "%s%d cores", do_rewind ? "" : ", ", gt->cpu_top.nr_cpu);
+		do_rewind = 0;
+	}
+	if (gt->cpu_top.nr_running) {
+		len += sprintf(txt + len, "%s%d processes", do_rewind ? "" : ", ", gt->cpu_top.nr_running);
+		do_rewind = 0;
+	}
+	sprintf(txt + len, ")");
+	if (do_rewind)
+		txt[rewind] = '\0';
 	cairo_show_text(ctx->cr, txt);
 	y += 14;
 
-- 
2.7.4