Domain Id

System identification number of the logical domain.

 

On ccNUMA systems, cell local memory domains are numbered starting

 

at 1, and the interleaved memory domain Id is –1.

 

On SMP systems, the only domain is numbered 0.

Shared Pages

Number of shared resident memory pages currently in use by this process.

 

This is typically executable code for the program, shared libraries, and

 

mmap'd (shared) regions. These are pages that could be shared with another

 

process but are not necessarily currently being shared.

Private Pages

Number of private resident memory pages currently in use by this process.

 

These are typically static data and dynamic (malloc'd heap) regions.

 

These memory pages cannot be shared with other processes.

Weighted Pages

Number of resident pages for this process, weighted by the number of

 

processes actually sharing each page. Private pages count as one page

 

and shared pages count as the page divided by the number of processes

 

sharing that page. Therefore, it will be at least as large as the number of

 

private pages but less than or equal to the total number of pages. It indicates

 

the “load” that this process is putting on system memory.

Total Pages

Total number of resident pages that are currently allocated to this process.

 

It is the total of Shared Pages and Private Pages.

Measuring System Usage Concurrently with Other Measurements

You can request a measurement of your program's system usage in addition to, and at the same time as, any other HP Caliper measurement.

To do this, use the --system-usage=option. You can use this option with any measurement:

--system-usage=[all][:runstatus][:cpu][:io][:syscalls]

For example:

$ caliper cpu -o REPORT --system-usage=all my_app

You can use this option to get four kinds of system measurement data:

•Run status: how much time each process or thread spent running, eligible to run but not running, and waiting (runstatus parameter)

•cpu: how much of each process or thread running time was spent on each CPU and how often the process or thread was moved to another CPU (cpu parameter).

•io: gives a breakdown of all I/O a process or thread does, by category (10 parameter).

•System calls: the count and time spent in every system call called by a process or thread (syscalls parameter)

The all parameter causes all four kinds of system data to be measured.

As with all HP Caliper command-line options, --system-usage=can be abbreviated to any non-ambiguous string, and colon-separated arguments can be given in any order.

Example Report Output

Figure 29 (page 157) shows some example output for the --system-usage=alloption.

156 HP Caliper Features Specific to HP-UX