Difference between revisions of "PAPI"
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{{#if: {{#var: pbs}}|==PBS Script Examples== | {{#if: {{#var: pbs}}|==PBS Script Examples== | ||
See the [[{{PAGENAME}}_PBS]] page for {{#var: app}} PBS script examples.|}} | See the [[{{PAGENAME}}_PBS]] page for {{#var: app}} PBS script examples.|}} | ||
| − | {{#if: {{#var: policy}}|==Usage | + | {{#if: {{#var: policy}}|==Usage Policy== |
WRITE USAGE POLICY HERE (perhaps templates for a couple of main licensing schemes can be used)|}} | WRITE USAGE POLICY HERE (perhaps templates for a couple of main licensing schemes can be used)|}} | ||
{{#if: {{#var: testing}}|==Performance== | {{#if: {{#var: testing}}|==Performance== | ||
Revision as of 16:32, 10 August 2012
Description
The Performance API (PAPI) project specifies a standard application programming interface (API) for accessing hardware performance counters available on most modern microprocessors. These counters exist as a small set of registers that count Events, occurrences of specific signals related to the processor's function. Monitoring these events facilitates correlation between the structure of source/object code and the efficiency of the mapping of that code to the underlying architecture. This correlation has a variety of uses in performance analysis including hand tuning, compiler optimization, debugging, benchmarking, monitoring and performance modeling. In addition, it is hoped that this information will prove useful in the development of new compilation technology as well as in steering architectural development towards alleviating commonly occurring bottlenecks in high performance computing.
Execution Environment and Modules
To use papi with the environment modules system at HPC the following commands are available:
Get module information for papi:
$module spider papi
Load the default application module:
$module load papi
The modulefile for this software adds the directory with executable files to the shell execution PATH and sets the following environment variables:
- HPC_PAPI_DIR - directory where papi is located.