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Software for White Rabbit PTP Core
Commit b8041f39 authored by Alessandro Rubini's avatar Alessandro Rubini Committed by Adam Wujek
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latency: add a way to force a fake late frame 

Signed-off-by: Alessandro Rubini's avatarAlessandro Rubini <rubini@gnudd.com>
parent 7302c8f1
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Showing with 19 additions and 1 deletion
lib/latency.c
View file @ b8041f39
......@@ -26,6 +26,8 @@ static int lat_verbose = 1;
static unsigned long prios[] = {7, 6, 0}; /* the prio for the 3 frames */
static int ltest_fake_delay_ns;
/* latency probe: we need to enqueue 3 short frames: 64*3+overhead = 256 */
static uint8_t __latency_queue[256];
static struct wrpc_socket *latency_socket, __static_latency_socket = {
......@@ -213,7 +215,10 @@ static int latency_poll_tx(void)
static uint32_t sequence;
static uint32_t lasts;
/* Send three frames -- lazily in native byte order */
/*
* Send three frames -- lazily in native byte order. Possibly
* subtract a fake delay, to trigger reporting.
*/
memset(&frame, 0, sizeof(frame));
frame.sequence = sequence++;
......@@ -221,16 +226,27 @@ static int latency_poll_tx(void)
latency_socket->prio = prios[0];
ptpd_netif_sendto(latency_socket, &latency_addr, &frame, sizeof(frame),
frame.ts + 0);
frame.ts[0].nsec -= ltest_fake_delay_ns;
if (frame.ts[0].nsec < 0) {
frame.ts[0].nsec += 1000 * 1000 * 1000;
frame.ts[0].sec --;
}
frame.type = 2;
latency_socket->prio = prios[1];
ptpd_netif_sendto(latency_socket, &latency_addr, &frame, sizeof(frame),
frame.ts + 1);
frame.ts[1].nsec -= ltest_fake_delay_ns;
if (frame.ts[1].nsec < 0) {
frame.ts[1].nsec += 1000 * 1000 * 1000;
frame.ts[1].sec --;
}
frame.type = 3;
latency_socket->prio = prios[2];
ptpd_netif_sendto(latency_socket, &latency_addr, &frame, sizeof(frame),
NULL);
ltest_fake_delay_ns = 0;
/* Every 10s remind we are sending ltest */
if (!lasts) {
......@@ -277,6 +293,8 @@ static int cmd_ltest(const char *args[])
lat_verbose = 1;
else if (HAS_SYSLOG && !strcmp(args[0], "quiet"))
lat_verbose = 0;
else if (!strcmp(args[0], "fake"))
fromdec(args[1], &ltest_fake_delay_ns);
else {
fromdec(args[0], &v);
latency_period_ms = v * 1000 + v1;
......
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