31 std::string PrettyDuration(uint64_t nano_duration, size_t max_fraction_digits) {  in PrettyDuration()
40 TimeUnit GetAppropriateTimeUnit(uint64_t nano_duration) {  in GetAppropriateTimeUnit()
41   const uint64_t one_sec = 1000 * 1000 * 1000;  in GetAppropriateTimeUnit()
42   const uint64_t one_ms  = 1000 * 1000;  in GetAppropriateTimeUnit()
43   const uint64_t one_us  = 1000;  in GetAppropriateTimeUnit()
55 uint64_t GetNsToTimeUnitDivisor(TimeUnit time_unit) {  in GetNsToTimeUnitDivisor()
56   const uint64_t one_sec = 1000 * 1000 * 1000;  in GetNsToTimeUnitDivisor()
57   const uint64_t one_ms  = 1000 * 1000;  in GetNsToTimeUnitDivisor()
58   const uint64_t one_us  = 1000;  in GetNsToTimeUnitDivisor()
73 std::string FormatDuration(uint64_t nano_duration, TimeUnit time_unit,  in FormatDuration()
76   uint64_t divisor = GetNsToTimeUnitDivisor(time_unit);  in FormatDuration()
91   const uint64_t whole_part = nano_duration / divisor;  in FormatDuration()
92   uint64_t fractional_part = nano_duration % divisor;  in FormatDuration()
100     uint64_t multiplier = 10;  in FormatDuration()
122 uint64_t MilliTime() {  in MilliTime()
126   return static_cast<uint64_t>(now.tv_sec) * UINT64_C(1000) + now.tv_nsec / UINT64_C(1000000);  in MilliTime()
130   return static_cast<uint64_t>(now.tv_sec) * UINT64_C(1000) + now.tv_usec / UINT64_C(1000);  in MilliTime()
134 uint64_t MicroTime() {  in MicroTime()
138   return static_cast<uint64_t>(now.tv_sec) * UINT64_C(1000000) + now.tv_nsec / UINT64_C(1000);  in MicroTime()
142   return static_cast<uint64_t>(now.tv_sec) * UINT64_C(1000000) + now.tv_usec;  in MicroTime()
146 uint64_t NanoTime() {  in NanoTime()
150   return static_cast<uint64_t>(now.tv_sec) * UINT64_C(1000000000) + now.tv_nsec;  in NanoTime()
154   return static_cast<uint64_t>(now.tv_sec) * UINT64_C(1000000000) + now.tv_usec * UINT64_C(1000);  in NanoTime()
158 uint64_t ThreadCpuNanoTime() {  in ThreadCpuNanoTime()
162   return static_cast<uint64_t>(now.tv_sec) * UINT64_C(1000000000) + now.tv_nsec;  in ThreadCpuNanoTime()
169 void NanoSleep(uint64_t ns) {  in NanoSleep()
172   tm.tv_nsec = ns - static_cast<uint64_t>(tm.tv_sec) * MsToNs(1000);  in NanoSleep()