[Intel-gfx] [PATCH i-g-t 2/4] tools/intel_gpu_top: Fix client layout on first sample period

[Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>]

From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

When I moved the client name to be last, I did not account for the fact
current code skips showing engine utilisation until at least two sampling
periods have passed. Consequence of this is that client name gets printed
as the second field and not under the "NAME" column header.

Fix it by emitting spaces instead of engine utilisation until two samples
have been collected.

v2:
 * Fix n_spaces return type to signed.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Kamil Konieczny <kamil.konieczny@linux.intel.com>
---
 tools/intel_gpu_top.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/tools/intel_gpu_top.c b/tools/intel_gpu_top.c
index 60fe06917531..b6d1014f00b8 100644
--- a/tools/intel_gpu_top.c
+++ b/tools/intel_gpu_top.c
@@ -928,12 +928,14 @@ static void free_display_clients(struct igt_drm_clients *clients)
 
 static const char *bars[] = { " ", "▏", "▎", "▍", "▌", "▋", "▊", "▉", "█" };
 
-static void n_spaces(const unsigned int n)
+static int n_spaces(const int n)
 {
-	unsigned int i;
+	int i;
 
 	for (i = 0; i < n; i++)
 		putchar(' ');
+
+	return n;
 }
 
 static void
@@ -2043,14 +2045,17 @@ print_client(struct igt_drm_client *c, struct engines *engines, double t, int li
 
 		len = printf("%*s ", clients->max_pid_len, c->pid_str);
 
-		for (i = 0;
-		     c->samples > 1 && i <= iclients->classes.max_engine_id;
-		     i++) {
+		for (i = 0; i <= iclients->classes.max_engine_id; i++) {
 			double pct, max;
 
 			if (!iclients->classes.capacity[i])
 				continue;
 
+			if (c->samples < 2) {
+				len += n_spaces(*class_w);
+				continue;
+			}
+
 			pct = (double)c->val[i] / period_us / 1e3 * 100;
 
 			/*
-- 
2.39.2