Use high-resolution clock in ddsperf

Signed-off-by: Erik Boasson <[email protected]>

Author: eboasson

src/tools/ddsperf/cputime.c

@@ -80,7 +80,7 @@ struct record_cputime_state_thr {
 
 struct record_cputime_state {
   bool supported;
-  dds_time_t tprev;
+  ddsrt_hrtime_t tprev;
   uint32_t vcswprev;
   uint32_t ivcswprev;
   size_t nthreads;
@@ -113,7 +113,7 @@ static bool above_threshold (double *max, double *du_skip, double *ds_skip, doub
   }
 }
 
-bool record_cputime (struct record_cputime_state *state, const char *prefix, dds_time_t tnow)
+bool record_cputime (struct record_cputime_state *state, const char *prefix, ddsrt_hrtime_t tnow)
 {
   if (state == NULL)
     return false;
@@ -126,7 +126,7 @@ bool record_cputime (struct record_cputime_state *state, const char *prefix, dds
   }
   double max = 0;
   double du_skip = 0.0, ds_skip = 0.0;
-  const double dt = (double) (tnow - state->tprev) / 1e9;
+  const double dt = (double) (tnow.v - state->tprev.v) / 1e9;
   bool some_above = false;
 
   state->s.maxrss = (double) usage.maxrss;
@@ -205,7 +205,7 @@ struct record_cputime_state *record_cputime_new (dds_entity_t wr)
   ddsrt_rusage_t usage;
   if (ddsrt_getrusage (DDSRT_RUSAGE_SELF, &usage) < 0)
     usage.nvcsw = usage.nivcsw = 0;
-  state->tprev = dds_time ();
+  state->tprev = ddsrt_time_highres ();
   state->wr = wr;
   state->vcswprev = (uint32_t) usage.nvcsw;
   state->ivcswprev = (uint32_t) usage.nivcsw;
@@ -259,7 +259,7 @@ void record_cputime_free (struct record_cputime_state *state)
 
 #else
 
-bool record_cputime (struct record_cputime_state *state, const char *prefix, dds_time_t tnow)
+bool record_cputime (struct record_cputime_state *state, const char *prefix, ddsrt_hrtime_t tnow)
 {
   (void) state;
   (void) prefix;

src/tools/ddsperf/cputime.h

@@ -17,7 +17,7 @@ struct record_cputime_state;
 
 struct record_cputime_state *record_cputime_new (dds_entity_t wr);
 void record_cputime_free (struct record_cputime_state *state);
-bool record_cputime (struct record_cputime_state *state, const char *prefix, dds_time_t tnow);
+bool record_cputime (struct record_cputime_state *state, const char *prefix, ddsrt_hrtime_t tnow);
 double record_cputime_read_rss (const struct record_cputime_state *state);
 bool print_cputime (const struct CPUStats *s, const char *prefix, bool print_host, bool is_fresh);