commit 1ae54d298c7f77040a798f46d68c7278e9ac2dd6
author Sumanth Bhat <sumanth.bhat@linux.intel.com> Wed Mar 01 23:03:03 2023 +0530
committer Sumanth Bhat <sumanth.bhat@linux.intel.com> Sat Mar 04 08:40:10 2023 +0530
tree 4e70edb217f66bed716db8b18a2928b804a7bca2
parent 258161b358322dcd607a418c8477c63455ea6a3c

peci_cmds: Add request-to-response latency measurement

To help in validation of the peci interface, this patch adds capability
in peci_cmds utility to measure request to response delays. A new
swith -t option provides this capability and it is designed to work
with other switches like verbose mode and command loop mode.

The desired behaviour of the -t switch is as follows:
1) -t switch used in isolation will measure the latency of only the
single command under execution.
2) -t switch with -l (loop) mode will measure the total latency and
provides average per command execution time.
3) -t switch with -l (loop) and -v (verbose) mode will capture total
latency, overall average as well as per command execution times.

Tested:
Case 1)
root# peci_cmds ping -t
Succeeded
Total time taken = 0.000212 seconds

Case 2)
root# peci_cmds ping -t -l 10
Succeeded
Total time taken = 0.001365 seconds
Average time taken per command = 0.000137 seconds

Case 3)
root# peci_cmds ping -t -l 6 -v
Time taken in iteration 1 = 0.000121 s
Succeeded

Time taken in iteration 2 = 0.000122 s
Succeeded

Time taken in iteration 3 = 0.000141 s
Succeeded

Time taken in iteration 4 = 0.000138 s
Succeeded

Time taken in iteration 5 = 0.000143 s
Succeeded

Time taken in iteration 6 = 0.000112 s
Succeeded
Total time taken = 0.000777 seconds
Average time taken per command = 0.000129 seconds

Change-Id: Idde67a6aed05367d91a7bdc807ae1fbfe2a81104
Signed-off-by: Sumanth Bhat <sumanth.bhat@linux.intel.com>