Darya.zelenina at 06:42, 30 June 2019

2019-06-30T06:42:18Z

← Older revision		Revision as of 06:42, 30 June 2019
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	\| If bit 1 is set, bits 24-27 are interpreted as a skip count value (power of 2). Example: If bits 24-27 contain a 3, the skip count is 8. If bits 24-27 contain a 5, the skip count is 32. If bits 24-27 are 0, the default of 16 is used as the skip count.		\| If bit 1 is set, bits 24-27 are interpreted as a skip count value (power of 2). Example: If bits 24-27 contain a 3, the skip count is 8. If bits 24-27 contain a 5, the skip count is 32. If bits 24-27 are 0, the default of 16 is used as the skip count.
	\|-		\|-
	\| colspan="3" Bits 28-31		\| colspan="3" \| Bits 28-31
	\| Reserved to VSI		\| Reserved to VSI
	\|}		\|}

Darya.zelenina: Created page with "'''RAD_SUPPORT''' is a system parameter that enables RAD-aware code to be executed on systems that support Resource Affinity Domains (RADs); for..."

2019-06-30T06:41:50Z

Created page with "'''RAD_SUPPORT''' is a system parameter that enables RAD-aware code to be executed on systems that support Resource Affinity Domains (RADs); for..."

New page

'''RAD_SUPPORT''' is a [[System Parameters|system parameter]] that enables RAD-aware code to be executed on systems that support [[RAD|Resource Affinity Domains]] (RADs); for example, AlphaServer GS160 systems and Integrity cell-based servers or BL8x0c i2 servers. A RAD is a set of hardware components (CPUs and memory) with common access characteristics.

Bits are defined in the RAD_SUPPORT parameter as follows:

RAD_SUPPORT (default is 207 for Alpha and 10944667 for Integrity servers)

<nowiki>
RAD_SUPPORT (default is 207 for Alpha and 10944667
for Integrity servers)
___________________________________________________

3 2 2 2 2 1 1
1 8 7 4 3 6 5 8 7 0

+-----+-----+-----------+-----------+-----------+
|00|00| skip|ss|gg|ww|pp|00|00|00|00|0p|df|cr|ae|
+-----+-----+-----------+-----------+-----------+

</nowiki>

{|
| Bit 0
| (e)
| Enable
| Enables RAD support
|-
| Bit 1
| (a)
| Affinity
| Enables Soft RAD Affinity (SRA) scheduling. Also enables the interpretation of the skip bits, 24-27.
|-
| Bit 2
| (r)
| Replicate
| Enables system-space code replication
|-
| Bit 3
| (c)
| Copy
| Enables copy on soft fault
|-
| Bit 4
| (f)
| Fault
| Enables special page fault allocation. Also enables the interpretation of the allocation bits, 16-23.
|-
| Bit 5
| (d)
| Debug
| Reserved to VSI
|-
| Bit 6
| (p)
| Pool
| Enables per-RAD non-paged pool
|-
| Bits 7-15
|
|
| Reserved to VSI
|-
| Bits 16-23
|
|
| If bit 4 is set, bits 16-23 are interpreted as follows:
Bits 16,17 (pp): Process = Pagefault on process (non global) pages
Bits 18,19 (ww): Swapper = Swapper's allocation of pages for processes
Bits 20,21 (gg): Global = Pagefault on global pages
Bits 22,23 (ss): System = Pagefault on system space pages

Encodings for pp, ww, gg, ss:

{|
| Current
| (0)
| allocate PFNs from the current CPU's RAD
|-
| Random
| (1)
| allocate PFNs using the "random" algorithm
|-
| Base
| (2)
| allocate PFNs from the operating system's "base" RAD
|-
| Home
| (3)
| allocate PFNs from the current process's home RAD
|}

If bits 16-23 are 0, the defaults for pp, ww, gg, ss are interpreted as follows:

Process = home RAD
Swapper = current RAD (also sets home RAD for process)
Global = random RAD
System = base RAD
|-
| colspan="3" | Bits 24-27
| If bit 1 is set, bits 24-27 are interpreted as a skip count value (power of 2). Example: If bits 24-27 contain a 3, the skip count is 8. If bits 24-27 contain a 5, the skip count is 32. If bits 24-27 are 0, the default of 16 is used as the skip count.
|-
| colspan="3" Bits 28-31
| Reserved to VSI
|}

For more information about using OpenVMS RAD features, see the OpenVMS Alpha Galaxy and Partitioning Guide or VSI OpenVMS Version 8.4 New Features and Documentation Overview. RAD_SUPPORT has the GEN attribute. REALTIME_SPTS has the DYNAMIC, GEN, and MAJOR attributes.

[[Category:System Parameters]]

RAD SUPPORT - Revision history

Darya.zelenina at 06:42, 30 June 2019

Darya.zelenina: Created page with "'''RAD_SUPPORT''' is a system parameter that enables RAD-aware code to be executed on systems that support Resource Affinity Domains (RADs); for..."