lshwc - Extract CPU Measurement Facilities counter sets

Red Hat Enterprise Linux 9.2 LPAR mode

Use the lshwc command to extract complete counter sets from the CPU Measurement Facilities for Linux® on IBM® Z.

The command output is in comma-separated values (CSV) format. Each output line starts with a timestamp and the CPU number, followed by the extracted counter values.

lshwc syntax

Read syntax diagramSkip visual syntax diagramlshwc-a-l<count>-i 60-i<seconds>,<cpu><from_cpu>-<to_cpu>: <sets>
Where:
-a or --allcpu
Displays counter values separately for each CPU. The default is a total summary line of all counters from all CPUs.
-l or --loop <count>
Performs the specified number of read operations.
-i or --interval <seconds>
Specifies a time interval, in seconds, that the command waits between read operations. The default is 60 seconds.
<cpu>
The number of a logical CPU.
<from_cpu>-<to_cpu>
A range of CPUs, where <from_cpu> is the number of the first logical CPU in the range and <to_cpu> is the number of the last logical CPU in the range. Ranges are useful if you want to extract the same counter sets for multiple, consecutive CPU numbers.
<sets>
A specification of counter sets to be extracted for a specified CPU or CPU range. By default, all available counters are extracted. Use a single alphabetic character to specify a counter set. You can specify multiple counter sets by specifying a multiple letters without a blank. In the specification, uppercase letters are equivalent to lowercase letters.
b|B
Include the basic counter set.
c|C
Include the crypto counter set.
e|E
Include the extended counter set.
m|M
Include the MT_Diagnostic counter set.
p|P|u|U
Include the problem counter set.
a|A
Include all known counter sets. This is the default.

Examples

  • This example selects the basic and problem counter sets on CPU 0 and CPU 1. Two read operations are performed and a summary line is printed for each read operation.
    # lshwc -l2 0-1:BP
Date,Time,CPU,CPU_CYCLES(0),INSTRUCTIONS(1),L1I_DIR_WRITES(2),L1I_PENALTY_CYCLES(3), ...
2021-04-01,11:50:32,Total,125422,39421,304,13953,454,97489,0,0
2021-04-01,11:51:32,Total,68074231,16386850,194028,21382384,317227,104503489,777383,14198
  • This example shows the counter values of the problem state counter set per CPU. CPU 0 and CPU 1 are selected.
    # lshwc -l 3 -a 0-1:p
Date,Time,CPU,PROBLEM_STATE_CPU_CYCLES(32),PROBLEM_STATE_INSTRUCTIONS(33)
2021-04-01,11:54:47,CPU0,0,0
2021-04-01,11:54:47,CPU1,0,0
2021-04-01,11:54:47,Total,0,0
2021-04-01,11:55:47,CPU0,818775,14198
2021-04-01,11:55:47,CPU1,125689,1306
2021-04-01,11:55:47,Total,944464,15504
2021-04-01,11:56:47,CPU0,3207071426,1489122591
2021-04-01,11:56:47,CPU1,3225092021,1489278312
2021-04-01,11:56:47,Total,6432163447,2978400903