Escali 4.4 manual Using SMCs built-in CPU-usage functionality, This produces the following report

Section: 4.5 Using SMC's built-in CPU-usage functionality

4.5 Using SMC's built-in CPU-usage functionality

Scali MPI Connect has the capability to report wall clock time, and user and system CPU time on all processes with a built-in CPU timing facility. To use SMC's built-in CPU-usage-timing it is necessary first to set the environment variable SCAMPI_CPU_USAGE.

The information displayed is collected with the system-call "times"; see man-pages for more information.

The output has two different blocks. The first block contains CPU-usage by the sub monitors on the different nodes. One line is printed for each sub monitor followed by a sum-line and an average-line. The second block consists of one line per process followed by a sum-line and an average-line.

For example, to get the CPU usage when running the image enhancement program do:

user% SCAMPI_CPU_USAGE=1 mpirun -np 4 ./kollektive-8 ./uf256-8.pgm

This produces the following report:

Submonitor timing stat. in secs	---------- Own ----------- ------ Own+Children ------
	Elapsed	User	System		Sum	User	System	Sum
Submonitor-1@r9	2.970	0.000	0.000		0.000	0.090	0.030	0.120
Submonitor-2@r8	3.250 -0.000		0.000		-0.000	0.060	0.040	0.100
Submonitor-3@r7	3.180 -0.000 -0.000			-0.000		0.050	0.030	0.080
Submonitor-4@r6	3.190	0.010	0.000		0.010	0.090	0.020	0.110
Total for submonitors	12.590	0.010	-0.000		0.010	0.290	0.120	0.410
Average per submonitor	3.147	0.003	-0.000		0.003	0.073	0.030	0.103

Process	timing stat. in secs	Elapsed	----------	Own -----------
			User	System	Sum
kollektive-8-0@r9		0.080	0.070	0.030	0.100
kollektive-8-1@r8		0.050	0.020	0.040	0.060
kollektive-8-2@r7		0.050	0.020	0.030	0.050
kollektive-8-3@r6		0.010	0.020	0.020	0.040
Sum for	processes	0.190	0.130	0.120	0.250
Average	per process	0.048	0.033	0.030	0.062
Elapsed	is walltime used by user-process/submonitor
User is	cpu-time used in user-process/submonitor

System is cpu-time used in system-calls

Sum is total cpu-time used by user-process/submonitor

Scali MPI Connect Release 4.4 Users Guide 45