@@ -17,6 +17,7 @@
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
+#include <unistd.h>
#include "lib/bluetooth.h"
@@ -28,6 +29,9 @@
#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 +73,18 @@ 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 +145,44 @@ 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 = "analyze.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 enhanced ansi\n");
+ fprintf(gplot, "set xlabel 'Latency (ms)'\n");
+ fprintf(gplot, "plot './%s' using 1:2 t 'Packets' w impulses\n",
+ filename);
+ fflush(gplot);
+
+ fclose(tmp);
+done:
+ pclose(gplot);
+ unlink(filename);
+}
+
static void conn_destroy(void *data)
{
struct hci_conn *conn = data;
@@ -187,6 +235,10 @@ 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 +499,35 @@ 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 +585,8 @@ 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);
}
}
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 +-------------------------------------------------------------------+ | + + + + + + + | | + Packets +-----+ | 6000 |-+ +| +-| | || | 5000 |-+ || +-| | || | | || | 4000 |-+ || +-| | || | | || | 3000 |-+ |+ +-| | || | | || | 2000 |-+ || +-| | +|| | 1000 |-+ |||++ +-| | |||||+ + | | ||||||+|+++ + + + + + | 0 +-------------------------------------------------------------------+ 0 10 20 30 40 50 60 70 80 Latency (ms) --- monitor/analyze.c | 83 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+)