Single Instruction Multiple Data; Shared Memory Communication - Direct Memory Access - IBM z13s Technical Manual

to a thread on a zIIP (for eligible workloads in z/OS) or an IFL (for z/VM) core in single-thread
or SMT mode. For more information, see 7.9, "Simultaneous multithreading" on page 295.
Table 7-57 lists the minimum support requirements for SMT.
Table 7-57 Minimum support requirements for SMT
Operating system
z/OS
z/VM
Statement of Direction: IBM is working with its Linux distribution partners to include SMT
support in future distribution releases.
All statements regarding IBM plans, directions, and intent are subject to change or
withdrawal without notice. Any reliance on these statements of general direction is at the
relying party's sole risk and will not create liability or obligation for IBM.

7.3.75 Single Instruction Multiple Data

The SIMD feature introduces a new set of instructions with z13s to enable parallel computing
that can accelerate code with string, character, integer, and floating point data types. The
SIMD instructions allow a larger number of operands to be processed with a single complex
instruction. For more information, see 3.4.2, "Single-instruction multiple-data" on page 90.
Table 7-58 lists the minimum support requirements for SIMD.
Table 7-58 Minimum support requirements for SIMD
Operating system
z/OS
z/VM
Statement of Direction: IBM is working with its Linux distribution partners to include SIMD
support in future distribution releases.
All statements regarding IBM plans, directions, and intent are subject to change or
withdrawal without notice. Any reliance on these statements of general direction is at the
relying party's sole risk and will not create liability or obligation for IBM.

7.3.76 Shared Memory Communication - Direct Memory Access

The SMC-D feature is introduced in the z13 and z13s servers. SMC-D maintains the
socket-API transparency aspect of SMC-R so that applications using TCPI/IP
communications can benefit immediately without requiring application software of IP topology
changes. Similar to SMC-R, this protocol utilizes shared memory architectural concepts
eliminating TCP/IP processing in the data path, yet preserving TCP/IP Qualities of Service for
connection management purposes.
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IBM z13s Technical Guide
Support requirements
z/OS V2R1 with APARs
z/VM V6R3
Support requirements
z/OS V2R1 with small programming enhancement (SPE)
z/VM V6.3 with PTFs for APAR VM65733