function::gettimeofday_ms - Linux

Overview

The gettimeofday_ms command is a precise microsecond timestamp generator. It provides a reliable and high-resolution timestamp for various use cases, such as performance benchmarking, synchronization, and logging accurate timestamps.

Syntax

gettimeofday_ms

Options/Flags

None

Examples

Get the current timestamp in milliseconds:

$ gettimeofday_ms
1673046584457

Use in a script to log timestamps:

while true; do
  echo "$(gettimeofday_ms): Message to log"
  sleep 1
done

Common Issues

  • Incorrect timestamp: Ensure that the system clock is accurate. Consider using ntpd or chrony to synchronize the clock.

Integration

  • Combine with awk: Extract specific fields from timestamp data.
  • Use in shell scripts: Add precise timestamps to logs or measure execution times.
  • Integrate with C/C++ code: Utilize the gettimeofday system call to obtain timestamps.

Related Commands

  • date: Display or format the current date and time.
  • clock_gettime: Retrieve high-resolution timestamps using different clock sources.