[PATCH BlueZ] monitor: Use gnuplot to plot graph of Latency-Packets

[PATCH BlueZ] monitor: Use gnuplot to plot graph of Latency-Packets

[Luiz Augusto von Dentz]

From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

This make use of gnuplot when using -a/--analyze to plot a graph of
Latency-Packets:

  Found BR-ACL connection with handle 256
        Address: XX:XX:XX:XX:XX:XX (Sony Home Entertainment&Sound Products Inc)
        60 RX packets
        22548 TX packets
        22547 TX completed packets
        3 msec min latency
        73 msec max latency
        11 msec median latency
        6 octets TX min packet size
        850 octets TX max packet size
        847 octets TX median packet size

  7000 +-------------------------------------------------------------------+
       |        +       +        +       +        +       +        +       |
       |        A                                          Packets    A    |
  6000 |-+     A                                                         +-|
       |                                                                   |
  5000 |-+                                                               +-|
       |                                                                   |
       |                                                                   |
  4000 |-+                                                               +-|
       |                                                                   |
       |                                                                   |
  3000 |-+      A                                                        +-|
       |                                                                   |
       |                                                                   |
  2000 |-+                                                               +-|
       |      A                                                            |
  1000 |-+       AA                                                      +-|
       |           A A                                                     |
       |        +   AAAA+        +       +        +       +        +       |
     0 +-------------------------------------------------------------------+
       0        10      20       30      40       50      60       70      80
                                      Latency
---
 monitor/analyze.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)

diff --git a/monitor/analyze.c b/monitor/analyze.c
index a20ba98b0be4..6fdb32f2dc55 100644
--- a/monitor/analyze.c
+++ b/monitor/analyze.c
@@ -28,6 +28,9 @@
 #include "monitor/packet.h"
 #include "monitor/analyze.h"
 
+#define TIMEVAL_MSEC(_tv) \
+	(long long)((_tv)->tv_sec * 1000 + (_tv)->tv_usec / 1000)
+
 struct hci_dev {
 	uint16_t index;
 	uint8_t type;
@@ -69,12 +72,18 @@ struct hci_conn {
 	struct timeval tx_lat_min;
 	struct timeval tx_lat_max;
 	struct timeval tx_lat_med;
+	struct queue *plot;
 	uint16_t tx_pkt_min;
 	uint16_t tx_pkt_max;
 	uint16_t tx_pkt_med;
 	struct queue *chan_list;
 };
 
+struct conn_plot {
+	long long x_msec;
+	size_t y_count;
+};
+
 struct l2cap_chan {
 	uint16_t cid;
 	uint16_t psm;
@@ -135,6 +144,42 @@ static struct l2cap_chan *chan_lookup(struct hci_conn *conn, uint16_t cid,
 	return chan;
 }
 
+static void tmp_write(void *data, void *user_data)
+{
+	struct conn_plot *plot = data;
+	FILE *tmp = user_data;
+
+	fprintf(tmp, "%lld %zu\n", plot->x_msec, plot->y_count);
+}
+
+static void conn_plot_draw(struct hci_conn *conn)
+{
+	const char *filename = "plot.tmp";
+	FILE *gplot = popen("gnuplot", "w");
+	FILE *tmp;
+
+	if (!gplot)
+		return;
+
+	if (queue_isempty(conn->plot))
+		goto done;
+
+	tmp = fopen(filename, "w");
+	if (!tmp)
+		goto done;
+
+	queue_foreach(conn->plot, tmp_write, tmp);
+
+	fprintf(gplot, "set terminal dumb\n");
+	fprintf(gplot, "set xlabel 'Latency'\n");
+	fprintf(gplot, "plot './%s' using 1:2 t 'Packets'\n", filename);
+	fflush(gplot);
+
+	fclose(tmp);
+done:
+	pclose(gplot);
+}
+
 static void conn_destroy(void *data)
 {
 	struct hci_conn *conn = data;
@@ -187,6 +232,10 @@ static void conn_destroy(void *data)
 	print_field("%u octets TX min packet size", conn->tx_pkt_min);
 	print_field("%u octets TX max packet size", conn->tx_pkt_max);
 	print_field("%u octets TX median packet size", conn->tx_pkt_med);
+
+	conn_plot_draw(conn);
+
+	queue_destroy(conn->plot, free);
 	queue_destroy(conn->chan_list, chan_destroy);
 
 	queue_destroy(conn->tx_queue, free);
@@ -447,6 +496,35 @@ static void evt_cmd_complete(struct hci_dev *dev, struct timeval *tv,
 	}
 }
 
+static bool match_plot_latency(const void *data, const void *user_data)
+{
+	const struct conn_plot *plot = data;
+	const struct timeval *latency = user_data;
+
+	return TIMEVAL_MSEC(latency) == plot->x_msec;
+}
+
+static void conn_plot_add(struct hci_conn *conn, struct timeval *latency,
+						uint16_t count)
+{
+	struct conn_plot *plot;
+
+	plot = queue_find(conn->plot, match_plot_latency, latency);
+	if (plot) {
+		plot->y_count += count;
+		return;
+	}
+
+	if (!conn->plot)
+		conn->plot = queue_new();
+
+	plot = new0(struct conn_plot, 1);
+	plot->x_msec = TIMEVAL_MSEC(latency);
+	plot->y_count = count;
+
+	queue_push_tail(conn->plot, plot);
+}
+
 static void evt_num_completed_packets(struct hci_dev *dev, struct timeval *tv,
 					const void *data, uint16_t size)
 {
@@ -504,6 +582,8 @@ static void evt_num_completed_packets(struct hci_dev *dev, struct timeval *tv,
 			} else
 				conn->tx_lat_med = res;
 
+			conn_plot_add(conn, &res, count);
+
 			free(last_tx);
 		}
 	}
-- 
2.41.0

RE: [BlueZ] monitor: Use gnuplot to plot graph of Latency-Packets

[bluez.test.bot]

[-- Attachment #1: Type: text/plain, Size: 1907 bytes --]

This is automated email and please do not reply to this email!

Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=769868

---Test result---

Test Summary:
CheckPatch                    FAIL      0.71 seconds
GitLint                       PASS      0.34 seconds
BuildEll                      PASS      28.32 seconds
BluezMake                     PASS      914.22 seconds
MakeCheck                     PASS      12.71 seconds
MakeDistcheck                 PASS      162.75 seconds
CheckValgrind                 PASS      265.33 seconds
CheckSmatch                   PASS      357.25 seconds
bluezmakeextell               PASS      107.57 seconds
IncrementalBuild              PASS      745.92 seconds
ScanBuild                     PASS      1126.12 seconds

Details
##############################
Test: CheckPatch - FAIL
Desc: Run checkpatch.pl script
Output:
[BlueZ] monitor: Use gnuplot to plot graph of Latency-Packets
WARNING:COMMIT_LOG_LONG_LINE: Possible unwrapped commit description (prefer a maximum 75 chars per line)
#85: 
        Address: XX:XX:XX:XX:XX:XX (Sony Home Entertainment&Sound Products Inc)

/github/workspace/src/src/13328625.patch total: 0 errors, 1 warnings, 122 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

/github/workspace/src/src/13328625.patch has style problems, please review.

NOTE: Ignored message types: COMMIT_MESSAGE COMPLEX_MACRO CONST_STRUCT FILE_PATH_CHANGES MISSING_SIGN_OFF PREFER_PACKED SPDX_LICENSE_TAG SPLIT_STRING SSCANF_TO_KSTRTO

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.




---
Regards,
Linux Bluetooth