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-rw-r--r--src/vppinfra/time.c23
1 files changed, 20 insertions, 3 deletions
diff --git a/src/vppinfra/time.c b/src/vppinfra/time.c
index edeca1f9c2f..0b00a11421d 100644
--- a/src/vppinfra/time.c
+++ b/src/vppinfra/time.c
@@ -251,15 +251,32 @@ void
clib_time_verify_frequency (clib_time_t * c)
{
f64 now_reference, delta_reference, delta_reference_max;
- u64 delta_clock;
+ f64 delta_clock_in_seconds;
+ u64 now_clock, delta_clock;
f64 new_clocks_per_second, delta;
/* Ask the kernel and the CPU what time it is... */
now_reference = unix_time_now ();
- c->last_cpu_time = clib_cpu_time_now ();
+ now_clock = clib_cpu_time_now ();
- /* Calculate a new clock rate sample */
+ /* Compute change in the reference clock */
delta_reference = now_reference - c->last_verify_reference_time;
+
+ /* And change in the CPU clock */
+ delta_clock_in_seconds = (f64) (now_clock - c->last_verify_cpu_time) *
+ c->seconds_per_clock;
+
+ /*
+ * Recompute vpp start time reference, and total clocks
+ * using the current clock rate
+ */
+ c->init_reference_time += (delta_reference - delta_clock_in_seconds);
+ c->total_cpu_time = (now_reference - c->init_reference_time)
+ * c->clocks_per_second;
+
+ c->last_cpu_time = now_clock;
+
+ /* Calculate a new clock rate sample */
delta_clock = c->last_cpu_time - c->last_verify_cpu_time;
c->last_verify_cpu_time = c->last_cpu_time;