Description
The System Response Time Measurement (SRTM) utility measures timer delivery latencies using the eRTOS synchronized clock and timers. It then prints the results.
Source Files
| File | Description |
|---|---|
| srtm.c |
Gathers thread-level timer latencies and prints out a summary and an optional histogram of results. The timer can also generate a sound on the speaker. This is a useful tool for measuring application-level response time latencies while the system is stressed by other activity, such as disk, network, and GUI IO, and/or heavy processing. Different hardware platforms can also be compared. |
Building the Sample
- Open a project file in the corresponding Visual Studio version you use for development.
- Build the project.
Running the Sample
To run the SRTM sample:
- Boot the system in its Windows Boot Configuration.
- Navigate to
<InstallDrive>\MaxRT\eRTOS\. - Right-click AutoStart.bat and select Edit.
- Find or write the Run command(s) for SRTM.
Note: For more information on Run commands, see Run.
- If using pre-written Run commands, remove the comment characters (: :) to enable the command(s).
- Re-boot the system from a GRUB bootable USB drive or hard drive.
- Select the desired GRUB boot configuration. See GRUB Boot Configurations for more information.
- Upon system boot, the sample(s) will run automatically after the eRTOS Kernel startup.
- Sample output will be displayed on the screen when the program ends.
- Re-boot the system in its Windows Boot Configuration.
- Navigate to
<InstallDrive>\MaxRT\eRTOS\. - Open the RtLogFile.txt log file to view sample output.
Usage
Run | srtm [/?] [/h] [/s] [/1] [/f] seconds_to_sample
Options
/h = Display histogram (in addition to summary)
/s = Turn on sound (square wave driven by timer)
/1 = Use a 10 MS timer period (default is 1 MS)
/f = Use fastest available timer (1MS or better)
/n num = Multiple SRTM instances aware (num = the total number of instances)
/? = help on usage
If no parameters given, the default is srtm /h /s /f 15
APIs Referenced
