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-rw-r--r--cmds/atrace/atrace.cpp24
1 files changed, 21 insertions, 3 deletions
diff --git a/cmds/atrace/atrace.cpp b/cmds/atrace/atrace.cpp
index 9def406..26c5b4a 100644
--- a/cmds/atrace/atrace.cpp
+++ b/cmds/atrace/atrace.cpp
@@ -264,9 +264,27 @@ static bool appendStr(const char* filename, const char* str)
static void writeClockSyncMarker()
{
char buffer[128];
+ int len = 0;
+ int fd = open(k_traceMarkerPath, O_WRONLY);
+ if (fd == -1) {
+ fprintf(stderr, "error opening %s: %s (%d)\n", k_traceMarkerPath,
+ strerror(errno), errno);
+ return;
+ }
float now_in_seconds = systemTime(CLOCK_MONOTONIC) / 1000000000.0f;
- snprintf(buffer, 128, "trace_event_clock_sync: parent_ts=%f\n", now_in_seconds);
- writeStr(k_traceMarkerPath, buffer);
+
+ len = snprintf(buffer, 128, "trace_event_clock_sync: parent_ts=%f\n", now_in_seconds);
+ if (write(fd, buffer, len) != len) {
+ fprintf(stderr, "error writing clock sync marker %s (%d)\n", strerror(errno), errno);
+ }
+
+ int64_t realtime_in_ms = systemTime(CLOCK_REALTIME) / 1000000;
+ len = snprintf(buffer, 128, "trace_event_clock_sync: realtime_ts=%" PRId64 "\n", realtime_in_ms);
+ if (write(fd, buffer, len) != len) {
+ fprintf(stderr, "error writing clock sync marker %s (%d)\n", strerror(errno), errno);
+ }
+
+ close(fd);
}
// Enable or disable a kernel option by writing a "1" or a "0" into a /sys
@@ -646,7 +664,6 @@ static bool startTrace()
// Disable tracing in the kernel.
static void stopTrace()
{
- writeClockSyncMarker();
setTracingEnabled(false);
}
@@ -940,6 +957,7 @@ int main(int argc, char **argv)
// another.
ok = clearTrace();
+ writeClockSyncMarker();
if (ok && !async) {
// Sleep to allow the trace to be captured.
struct timespec timeLeft;