AMPSUBZ parameter: Difference between revisions
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<dd><var class="product">Model 204 V7.4</var> | <dd><var class="product">Model 204 V7.4</var> | ||
</dl> | </dl> | ||
==Description== | ==Description== | ||
<p>Applies to z/OS only</p> | <p> | ||
<p>On a z/OS system, <var class="product">Model 204</var> zIIP support enables you to offload <var class="product">Model 204</var> work from regular processors to zIIP processors.</p> | Applies to z/OS only</p> | ||
<p>AMPSUBZ specifies the number of active zIIP subtasks.</p> | <p> | ||
On a z/OS system, <var class="product">Model 204</var> zIIP support enables you to offload <var class="product">Model 204</var> work from regular processors to zIIP processors.</p> | |||
<p> | |||
<var>AMPSUBZ</var> specifies the number of active zIIP subtasks.</p> | |||
<p class="note"><b>Note:</b> MP subtasks and zIIP subtasks may be used together. Therefore, <var>[[AMPSUBS_parameter|AMPSUBS]]</var>, <var>[[NMPSUBS_parameter|NMPSUBS]]</var>, AMPSUBZ and <var>[[NMPSUBZ_parameter|NMPSUBZ]]</var> may all be greater than zero. However, to avoid unnecessary overhead: </p> | <p class="note"><b>Note:</b> MP subtasks and zIIP subtasks may be used together. Therefore, <var>[[AMPSUBS_parameter|AMPSUBS]]</var>, <var>[[NMPSUBS_parameter|NMPSUBS]]</var>, AMPSUBZ and <var>[[NMPSUBZ_parameter|NMPSUBZ]]</var> may all be greater than zero. However, to avoid unnecessary overhead: </p> | ||
<ul> | <ul> | ||
<li> | <li> | ||
Do not set AMPSUBS greater than the number of central processors actually available.</li> | Do not set <var>AMPSUBS</var> greater than the number of central processors actually available.</li> | ||
<li> | <li> | ||
Do not set AMPSUBZ greater than the number of zIIP processors actually available.</li> | Do not set <var>AMPSUBZ</var> greater than the number of zIIP processors actually available.</li> | ||
</ul> | </ul> | ||
<p>For more information about zIIP processing, refer to | <p>For more information about zIIP processing, refer to [[Performance monitoring and tuning#Offloading Model 204 work to zIIP processors|Offloading Model 204 work to zIIP processors]]. </p> | ||
[[Category:System parameters]] | [[Category:System parameters]] | ||
[[Category:Parameters]] | [[Category:Parameters]] | ||
Revision as of 23:42, 17 November 2014
Number of active zIIP eligible subtasks
Summary
- Default value
- None
- Parameter type
- System
- Where set
- On User 0's parameter line or reset by system manager
- Related products
- All
- Introduced
- Model 204 V7.4
Description
Applies to z/OS only
On a z/OS system, Model 204 zIIP support enables you to offload Model 204 work from regular processors to zIIP processors.
AMPSUBZ specifies the number of active zIIP subtasks.
Note: MP subtasks and zIIP subtasks may be used together. Therefore, AMPSUBS, NMPSUBS, AMPSUBZ and NMPSUBZ may all be greater than zero. However, to avoid unnecessary overhead:
- Do not set AMPSUBS greater than the number of central processors actually available.
- Do not set AMPSUBZ greater than the number of zIIP processors actually available.
For more information about zIIP processing, refer to Offloading Model 204 work to zIIP processors.