VM66168: PEVM66120 SMAPI MACHINES USING HIGH CPU. VSMWORK1 SPACE FILLING 18/05/31 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Since installing RSU1801 and VM66120 on z/VM 6.4 system, virtual
  machines VSMGUARD and VSMREQIx can consume almost 50% of 2
  general CP engines.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of Systems Management Application  *
  *                 Programming (SMAPI) services are affected by *
  *                 this change.                                 *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  ****************************************************************
  * RECOMMENDATION: APPLY PTF                                    *
  ****************************************************************
  After installing APAR VM66120, the SMAPI VSMGUARD and one or
  more SMAPI request servers each began consuming nearly 50% of
  available CPU and produced no discernible results.
  

Problem conclusion

• VM66120 corrected a problem with the timing of accesses to the
  SMAPI shared queue and AF_IUCV connections interfering with each
  other. Part of this correction was adding a ThreadDelay call to
  the check loop. However, the ThreadDelay function was not
  properly defined in the code calling it, no delay occurred, and
  the check loop continued indefinitely. The change is to add the
  proper definitions for the ThreadDelay function.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UM35332

Modules/Macros

• DMSRSIMT DMSRSXME
  

Fix information

• Fixed component name

  VM CMS

• Fixed component ID

  568411201

Applicable component levels

• R640 PSY UM35332

     UP18/06/18 P 1802 {

Fix is available

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