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HP OpenVMS Systems Documentation |
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OpenVMS System Services Reference Manual
Because this number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes). SYI$_CLUSTER_FSYSIDReturns the system identification of the founding node, which is the first node in the OpenVMS Cluster system to boot.The cluster management software assigns this system identification to the node. You can obtain this information by using the DCL command SHOW CLUSTER. Because the system identification is a 6-byte hexadecimal number, the buffer length field in the item descriptor should specify 6 (bytes). SYI$_CLUSTER_FTIMEReturns the time when the founding node is booted. The founding node is the first node in the OpenVMS Cluster system to boot.Because the returned time is in the standard 64-bit absolute time format, the buffer length field in the item descriptor should specify 8 (bytes). SYI$_CLUSTER_MEMBERReturns the membership status of the node in the OpenVMS Cluster system. The membership status specifies whether the node is currently a member of the cluster.Because the membership status of a node is described in a 1-byte bit field, the buffer length field in the item descriptor should specify 1 (byte). If bit 0 in the bit field is set, the node is a member of the cluster; if it is clear, then it is not a member of the cluster. SYI$_CLUSTER_NODESReturns the number (in decimal) of nodes currently in the OpenVMS Cluster system.Because this number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes). SYI$_CLUSTER_QUORUMReturns the number (in decimal) that is the total of the quorum values held by all nodes in the OpenVMS Cluster system. Each node's quorum value is derived from its system parameter EXPECTED_VOTES.Because this number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes). SYI$_CLUSTER_VOTESReturns the total number of votes held by all nodes in the OpenVMS Cluster system. The number of votes held by any one node is determined by that node's system parameter VOTES.Because this decimal number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes). SYI$_COMMUNITY_IDOn Alpha systems, returns the integer Galaxy community ID.SYI$_CONTIG_GBLPAGESReturns the maximum number of free, contiguous global CPU-specific pages. This number is the largest size global section that can be created.Because this number is a longword, the buffer length in the item descriptor should specify 4 (bytes). SYI$_CPUOn VAX systems, returns the CPU processor type, as represented in the processor's system identification (SID) register.For example, the integer 1 represents a VAX--11/780 system and the integer 6 represents a VAX 8530, VAX 8550, VAX 8700, or VAX 8800 system. Because the processor type is a longword decimal number, the buffer length field in the item descriptor should specify 4 (bytes). The $PRDEF macro defines the following symbols for the processor types:
On Alpha systems, $GETSYI returns PR$_SID_TYP_NOTAVAX. For information about extended processor type codes, see the description for the SYI$_XCPU item code. SYI$_CPUCAP_MASKOn Alpha systems, returns an array of quadword user capability masks for all CPUs in the system. This array is indexed by CPU ID and contains as many elements as the amount of space specified by the buffer length field in the item descriptor.To minimize wasted space, a prior call to $GETSYI with SYI$_MAX_CPUS will provide the number of CPUs that need to be retrieved. Multiplying that value by 8 bytes for each quadword provides the value to be written in the buffer length field of the item descriptor. SYI$_CPUCONFOn Alpha systems, returns the CPU Configuration bit mask: 0 through 31.SYI$_CPU_FAILOVEROn Alpha systems, returns the array of CPU failover partitions.SYI$_CPUTYPEOn Alpha systems, returns the processor type, as stored in the hardware restart parameter block (HWRPB).For example, the value of 2 represents a DECchip 21064 processor. Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes). The following table shows the processor codes and processors:
SYI$_CWLOGICALSReturns the number 1 if the clusterwide logical name database has been initialized on the CPU, or the value 0 if it has not been initialized. Because this number is a Boolean value (1 or 0), the buffer length field in the item descriptor should specify 1 (byte).SYI$_DAY_OVERRIDEReturns the number 1 if the SET DAY command has been used to override the default primary and secondary day types in the user authorization file that are used to control user logins. $GETSYI returns the number 0 if no override is currently in effect, and the contents of user authorization file records for each user are being honored.SYI$_DAY_SECONDARYReturns the number 1 if any override with the SET DAY command has been used to specify that the current day is to be considered a Secondary day for user login purposes. $GETSYI returns the number 0 if any override with the SET DAY command has been used to specify that the current day is to be considered a Primary day for user login purposes.If $GETSYI returns the number 0 for SYI$_DAY_OVERRIDE, the number returned for SYI$_DAY_SECONDARY is meaningless. 
SYI$_DECIMAL_EMULATEDReturns the number 1 if the decimal string instructions are emulated on the CPU and the value 0 if they are not.Because this number is a Boolean value (1 or 0), the buffer length field in the item descriptor should specify 1 (byte). SYI$_DECNET_FULLNAMEReturns, as a character string, the DECnet for OpenVMS full name of the node.Because the DECnet for OpenVMS full name of a node can contain up to 255 characters, the buffer length field in the item descriptor should specify 255 (bytes). SYI$_D_FLOAT_EMULATEDReturns the number 1 if the D_floating instructions are emulated on the CPU and 0 if they are not.Because this number is a Boolean value (1 or 0), the buffer length field in the item descriptor should specify 1 (byte). SYI$_DEF_PRIO_MAXOn Alpha systems, returns the maximum priority for the default scheduling policy.Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes). SYI$_DEF_PRIO_MINOn Alpha systems, returns the minimum priority for the default scheduling policy.Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes). SYI$_ERLBUFFERPAGESReturns the number of pages (on VAX systems) or pagelets (on Alpha systems) in an error log buffer.Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes). SYI$_ERRORLOGBUFFERSReturns the number of system pages (on VAX systems) or pagelets (on Alpha systems) in use as buffers for the error logger.Because this number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes). SYI$_F_FLOAT_EMULATEDReturns the number 1 if the F_floating instructions are emulated on the CPU and 0 if they are not.Because this number is a Boolean value (1 or 0), the buffer length field in the item descriptor should specify 1 (byte). SYI$_FREE_GBLPAGESReturns the current number of free global pages. The system parameter GBLPAGES sets the number of global pages that can exist systemwide.Because the current number is a longword, the buffer length in the item descriptor should specify 4 (bytes). SYI$_FREE_GBLSECTSReturns the current number of free global section table entries. The system parameter GBLSECTIONS sets the maximum number of global sections that can exist systemwide.Because the current number is a longword, the buffer length in the item descriptor should specify 4 (bytes). SYI$_G_FLOAT_EMULATEDReturns the number 1 if the G_floating instructions are emulated on the CPU and the value 0 if they are not.Because this number is a Boolean value (1 or 0), the buffer length field in the item descriptor should specify 1 (byte). SYI$_GALAXY_IDOn Alpha systems, returns the 128-bit Galaxy ID.SYI$_GALAXY_MEMBEROn Alpha systems, returns 1 if you are member of a Galaxy sharing community, 0 if you are not a member.SYI$_GALAXY_PLATFORMOn Alpha systems, returns 1 if you are running on a Galaxy platform, 0 if you are not running on a Galaxy platform.SYI$_GALAXY_SHMEMSIZEOn Alpha systems, returns the number of shared memory pages. If the current instance is not a member of a Galaxy, no shared memory is reported.SYI$_GH_RSRVPGCNTOn Alpha systems, returns the number of pages covered by granularity hints to reserve for use by the Install utility after system startup has completed.Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes). SYI$_H_FLOAT_EMULATEDReturns the number 1 if the H_floating instructions are emulated on the CPU and the value 0 if they are not.Because this number is a Boolean value (1 or 0), the buffer length field in the item descriptor should specify 1 (byte). SYI$_HW_MODELReturns a small integer that can be used to identify the model type of the node.An integer greater than 1023 indicates an Alpha node. An integer less than or equal to 1023 indicates a VAX node. The $ALPHADEF and $VAXDEF macros in SYS$LIBRARY:STARLET define the model type integers. See the tables under the SYI$_HW_NAME item code for the VAX processor names and the corresponding model types. Because SYI$_HW_MODEL is a word, the buffer length field in the item descriptor should specify 2 (bytes). SYI$_HW_NAMEReturns the model name string of the node. The model name is a character string that describes the model of the node (such as VAX 8800, MicroVAX II). The model name usually corresponds to the nameplate that appears on the outside of the CPU cabinet.Because SYI$_HW_NAME can include up to 31 characters, the buffer length field in the item descriptor should specify 31 (bytes). The following table lists the Alpha model processor names and the corresponding model types:
The following table lists the VAX model processor names and the corresponding model types:
SYI$_IO_PREFER_CPUOn Alpha systems, returns the bit mask of CPUs available to be Fast Path preferred CPUs.SYI$_ITB_ENTRIESOn Alpha systems, returns the number of instruction stream translation buffer entries that support granularity hints to be allocated for resident code.Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes). SYI$_MAX_CPUSOn Alpha systems, returns the maximum number of CPUs that can exist in the current configuration of the symmetric multiprocessing (SMP) system.SYI$_MAX_PFNReturns the highest numbered PFN in use by the operating system. The highest numbered PFN used by OpenVMS is influenced by the PHYSICAL_MEMORY system parameter.Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes). SYI$_MEMSIZEReturns the total number of pages of physical memory in the system configuration.Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes). SYI$_NODE_AREAReturns the DECnet area of the node.Because the DECnet area is a longword decimal number, the buffer length field in the item descriptor should specify 4 (bytes). SYI$_NODE_CSIDReturns the OpenVMS Cluster system ID (CSID) of the node. The CSID is a longword hexadecimal number assigned to the node by the cluster management software.Because the CSID is a longword, the buffer length field in the item descriptor should specify 4 (bytes). SYI$_NODE_EVOTESReturns the number of votes the node expects to find in the OpenVMS Cluster system. This number is determined by the system parameter EXPECTED_VOTES.Because the number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes). SYI$_NODE_HWVERSReturns the hardware version of the node. The high word of the buffer length contains the CPU type. The $VAXDEF and $ALPHADEF macros define the CPU types.Because the hardware version is a 12-byte hexadecimal number, the buffer length field in the item descriptor should specify 12 (bytes). SYI$_NODE_NUMBERReturns the DECnet for OpenVMS number of the node.Because the DECnet for OpenVMS number is a longword decimal number, the buffer length field in the item descriptor should specify 4 (bytes). SYI$_NODE_QUORUMReturns the value (in decimal) of the quorum held by the node. This number is derived from the node's system parameter EXPECTED_VOTES.Because this number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes). SYI$_NODE_SWINCARNReturns the software incarnation of the node.Because the software incarnation of the node is an 8-byte hexadecimal number, the buffer length field in the item descriptor should specify 8 (bytes). SYI$_NODE_SWTYPEReturns the software type of the node. The software type indicates whether the node is a VAX system, an Alpha system, or an HSC storage controller.Because the software type is a 4-byte ASCII string, the buffer length field in the item descriptor should specify 4 (bytes). SYI$_NODE_SWVERSReturns the software version of the node.Because the software version is a 4-byte ASCII string, the buffer length field in the item descriptor should specify 4 (bytes). SYI$_NODE_SYSTEMIDReturns the system identification of the node.The OpenVMS Cluster management software assigns this system identification to the node. You can obtain this information by using the DCL command SHOW CLUSTER. Because the system identification is a 6-byte hexadecimal number, the buffer length field in the item descriptor should specify 6 (bytes). SYI$_NODE_VOTESReturns the number (in decimal) of votes held by the node. This number is determined by the node's system parameter VOTES.Because this number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes). SYI$_NODENAMEReturns, as a character string, the name of the node in the buffer specified in the item list.Because this name can include up to 15 characters, the buffer length field in the item descriptor should specify 15 (bytes). SYI$_PAGEFILE_FREEReturns the number of free pages in the currently installed page files.Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes). SYI$_PAGEFILE_PAGEReturns the number of pages in the currently installed page files.Because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes). SYI$_PAGE_SIZEReturns the number of CPU-specific bytes per page in the system.On VAX systems, $GETSYI always returns 512. On Alpha systems, CPU page size varies from system to system. On Alpha and VAX systems, because this number is a longword, the buffer length field in the item descriptor should specify 4 (bytes). SYI$_PARTITION_IDOn Alpha systems, returns the integer Galaxy partition ID.SYI$_PFN_MEMORY_MAPReturns a map describing the system's use of physical memory. The following figure shows an example of a physical memory map:
The first longword of the physical memory contains a count of descriptors. This number is equal to the value returned when the SYI$_PMD_COUNT item code is specified. Each descriptor contains at least 3 longwords: a word containing the length of the descriptor (always use PMM$C_LENGTH when determining descriptor size); a flags word (whose bits are defined in the following table); and the starting PFN for that physical memory cluster and the number of PFNs in that cluster.
The structure definition for the physical memory descriptor resides in PMMDEF.H. Because the size of the physical memory map returned by $GETSYI can vary from system to system, Compaq recommends using the following steps when using this item code:
SYI$_PHYSICALPAGESReturns the total number of PFNs that exist between the first PFN (typically PFN 0) and the highest numbered PFN.
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