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nexedi
tsn-measures
Commits
9ef4fea2
Commit
9ef4fea2
authored
Sep 24, 2020
by
Joanne Hugé
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Plain Diff
Add histogram for diff ts measures
parent
2ba307c4
Changes
2
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2 changed files
with
46 additions
and
18 deletions
+46
-18
packet-exchange/src/common.h
packet-exchange/src/common.h
+1
-0
packet-exchange/src/server.c
packet-exchange/src/server.c
+45
-18
No files found.
packet-exchange/src/common.h
View file @
9ef4fea2
...
...
@@ -26,6 +26,7 @@
#define MAX_KERNEL_LATENCY 1000
#define MAX_RTT 1000
#define MAX_JITTER 1000
#define MAX_DIFF_TS 1000
#define MAX_BUFFER_SIZE 1024
...
...
packet-exchange/src/server.c
View file @
9ef4fea2
...
...
@@ -65,6 +65,7 @@ static void sighand(int sig_num);
static
uint64_t
kernel_latency_hist
[
MAX_KERNEL_LATENCY
];
static
uint64_t
jitter_hist
[
MAX_JITTER
];
static
uint64_t
diff_ts_hist
[
MAX_DIFF_TS
];
static
main_param_t
main_params
;
static
thread_param_t
thread_params
;
static
ingress_param_t
ingress_params
;
...
...
@@ -84,6 +85,7 @@ static pthread_cond_t emit_signal_ts_received;
static
int64_t
min_diff_ts
=
INT_MAX
;
static
int64_t
max_diff_ts
=
0
;
static
int64_t
avg_diff_ts
=
0
;
static
uint64_t
high_diff_ts
=
0
;
static
char
ts_tracemark_buf
[
64
];
...
...
@@ -264,6 +266,14 @@ static void *tsn_thread(void *p) {
max_diff_ts
=
_max_
(
diff_us
,
max_diff_ts
);
avg_diff_ts
=
(
avg_diff_ts
*
ingress_stats
.
packets_received
+
diff_us
)
/
(
ingress_stats
.
packets_received
+
1
);
// Histogram
if
(
enable_histograms
)
{
if
(
diff_us
>
((
int
)
MAX_DIFF_TS
)
||
diff_us
<
0
)
high_diff_ts
++
;
else
diff_ts_hist
[
diff_us
]
++
;
}
// If the latency hits the tracing threshold, stop tracing
if
(
main_params
.
enable_tracing
&&
(
max_diff_ts
>
((
int64_t
)
thread_params
.
latency_threshold
)))
{
...
...
@@ -400,6 +410,7 @@ int main(int argc, char *argv[]) {
if
(
enable_histograms
)
{
memset
(
kernel_latency_hist
,
0
,
sizeof
(
kernel_latency_hist
));
memset
(
jitter_hist
,
0
,
sizeof
(
jitter_hist
));
memset
(
diff_ts_hist
,
0
,
sizeof
(
diff_ts_hist
));
}
// Enable ftrace
...
...
@@ -481,6 +492,21 @@ static void print_histograms() {
duration_hour
=
duration
/
NSEC_PER_SEC
/
3600
;
duration_minutes
=
duration
/
NSEC_PER_SEC
/
60
-
duration_hour
*
60
;
if
(
thread_params
.
enable_diff_ts
)
{
printf
(
"# RX latency histogram
\n
"
);
max_latency
=
histogram_max
(
diff_ts_hist
,
MAX_DIFF_TS
-
1
);
for
(
int
j
=
0
;
j
<
max_latency
;
j
++
)
printf
(
" %06d %015"
PRIi64
"
\n
"
,
j
,
diff_ts_hist
[
j
]);
printf
(
"# Duration: %dh%d
\n
"
"# Lost packets: %"
PRIu64
"
\n
"
,
duration_hour
,
duration_minutes
,
high_diff_ts
);
}
else
{
max_jitter
=
histogram_max
(
jitter_hist
,
MAX_JITTER
-
1
);
min_jitter
=
histogram_min
(
jitter_hist
,
MAX_JITTER
-
1
);
...
...
@@ -510,6 +536,7 @@ static void print_histograms() {
"# Lost packets: %"
PRIu64
"
\n
"
,
MAX_JITTER
/
2
-
min_jitter
,
duration_hour
,
duration_minutes
,
ingress_stats
.
high_jitter
);
}
}
...
...
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