DFHSIP
DFHSIP is the CICS system initialization program called by the operating system. The DFHSIP task is active during CICS/ESA initialization and termination. It has no active code while CICS/ESA is accepting logons and performing user tasks.
Hints
DFHSIP is the CICS program that appears on the Measurement Session Data report, if your installation uses the standard IBM-supplied name.
In later version of CICS, DFHSIP initializes CICS and contains code for a number of CICS domains. In CICS 4.1, code for the following domains are included in DFHSIP:
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kernal (KE)
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domain manager (DM)
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dispatcher (DS)
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dump (DU)
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global catalog (GC)
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local catalog (LC)
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loader (LD)
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lock manager (LM)
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message (ME)
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parameter manager (PA)
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storage manager (SM)
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trace (TR)
With these additional modules included in DFHSIP, the CPU time will increase considerably when upgrading to CICS 4.1.
Reference Sources
CICS Transaction Server for z/OS Diagnosis Reference
Strobe for CICS, Compuware Corporation
CICS Tuning and Performance, Xephon Report, J. Petersen, August 1991