From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Analoguous to top(1) we can enable the user to exit from the tool by
pressing 'q' on the console.
v2:
* Fix sleep period with closed stdin. (Chris)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
---
man/intel_gpu_top.rst | 6 ++++
tools/intel_gpu_top.c | 80 ++++++++++++++++++++++++++++++++++++-------
2 files changed, 73 insertions(+), 13 deletions(-)
diff --git a/man/intel_gpu_top.rst b/man/intel_gpu_top.rst
index 5552e9699d26..2e0c3a05acc1 100644
--- a/man/intel_gpu_top.rst
+++ b/man/intel_gpu_top.rst
@@ -48,6 +48,12 @@ OPTIONS
-d
Select a specific GPU using supported filter.
+RUNTIME CONTROL
+===============
+
+Supported keys:
+
+ 'q' Exit from the tool.
DEVICE SELECTION
================
diff --git a/tools/intel_gpu_top.c b/tools/intel_gpu_top.c
index dbd353673e55..46221c9543eb 100644
--- a/tools/intel_gpu_top.c
+++ b/tools/intel_gpu_top.c
@@ -23,24 +23,26 @@
#include "igt_device_scan.h"
-#include <stdio.h>
-#include <sys/types.h>
-#include <dirent.h>
-#include <stdint.h>
#include <assert.h>
-#include <string.h>
#include <ctype.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <sys/stat.h>
+#include <dirent.h>
+#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
-#include <sys/ioctl.h>
-#include <errno.h>
-#include <math.h>
-#include <locale.h>
#include <limits.h>
+#include <locale.h>
+#include <math.h>
+#include <poll.h>
#include <signal.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <termios.h>
#include "igt_perf.h"
@@ -1246,6 +1248,54 @@ static char *tr_pmu_name(struct igt_device_card *card)
return device;
}
+static void interactive_stdin(void)
+{
+ struct termios termios = { };
+ int ret;
+
+ ret = fcntl(0, F_GETFL, NULL);
+ ret |= O_NONBLOCK;
+ ret = fcntl(0, F_SETFL, ret);
+ assert(ret == 0);
+
+ ret = tcgetattr(0, &termios);
+ assert(ret == 0);
+
+ termios.c_lflag &= ~ICANON;
+ termios.c_cc[VMIN] = 1;
+ termios.c_cc[VTIME] = 0; /* Deciseconds only - we'll use poll. */
+
+ ret = tcsetattr(0, TCSAFLUSH, &termios);
+ assert(ret == 0);
+}
+
+static void process_stdin(unsigned int timeout_us)
+{
+ struct pollfd p = { .fd = 0, .events = POLLIN };
+ int ret;
+
+ ret = poll(&p, 1, timeout_us / 1000);
+ if (ret <= 0) {
+ if (ret < 0)
+ stop_top = true;
+ return;
+ }
+
+ for (;;) {
+ char c;
+
+ ret = read(0, &c, 1);
+ if (ret <= 0)
+ break;
+
+ switch (c) {
+ case 'q':
+ stop_top = true;
+ break;
+ };
+ }
+}
+
int main(int argc, char **argv)
{
unsigned int period_us = DEFAULT_PERIOD_MS * 1000;
@@ -1315,6 +1365,7 @@ int main(int argc, char **argv)
switch (output_mode) {
case INTERACTIVE:
pops = &term_pops;
+ interactive_stdin();
break;
case STDOUT:
pops = &stdout_pops;
@@ -1427,7 +1478,10 @@ int main(int argc, char **argv)
if (stop_top)
break;
- usleep(period_us);
+ if (output_mode == INTERACTIVE)
+ process_stdin(period_us);
+ else
+ usleep(period_us);
}
free(codename);
--
2.25.1
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