OpenVMS Alpha System Analysis Tools Manual

Document revision date: 30 March 2001

OpenVMS Alpha System Analysis Tools Manual

Contents

Index

This example illustrates the default output of the SHOW CLUSTER command.

#2

SDA> SHOW CLUSTER/SCS VMScluster data structures -------------------------- --- SCS Listening Process Directory --- Entry Address Connection ID Process Name Information ------------- ------------- ------------ ----------- 80C71EC0 74D20000 SCS$DIRECTORY Directory Server 80C72100 74D20001 MSCP$TAPE NOT PRESENT HERE 80E16940 74D20002 MSCP$DISK MSCP$DISK 80E23B40 74D20003 VMS$SDA_AXP Remote SDA 80E23B40 74D20003 VMS$SDA_AXP Remote SDA 80E25540 74D20004 VMS$VAXcluster ................ 80E29E80 74D20005 SCA$TRANSPORT 813020C0 74D20053 PATHWORKScluster .....TurboServer --- SCS Systems Summary --- SB Address Node Type System ID Paths ---------- ---- ---- --------- ----- 8493BC00 ARUSHA VMS 000000004CA1 2 80E23800 HSJ201 HSJ 4200101A1B20 1 80E3FF40 ORNOT VMS 000000004CA7 2 80E43F40 LOADQ VMS 000000004C31 2 80E473C0 HSJ300 HSJ 420010051D20 1 80E47CC0 HSJ101 HSJ 420010081720 1 80E47D40 HSJ100 HSJ 4200100B1520 1 80E478C0 HSJ600 HSJ 420010070920 1 80E49180 HSJ401 HSJ 4200100D0320 1 80E47DC0 HSJ301 HSJ 420010091F20 1 80E47E40 HSJ601 HSJ 4200100A0B20 1 80E49500 HSJ400 HSJ 4200100C0120 1 80E5BF80 CHOBE VMS 000000004CD6 2 80E5F080 ETOSHA VMS 000000004CF3 2 80E5FC00 VMS VMS 000000004C7A 2 80E4FF80 HSJ501 HSJ 4200101C0720 1 80E5FD80 HSJ200 HSJ 420010191920 1 80E5FE80 HSJ500 HSJ 4200101B0520 1 80E5FE00 IPL31 VMS 000000004F52 2 80E59F80 ZAPNOT VMS 000000004CBB 2 80E61F80 ALTOS VMS 000000004D0F 2 80E72000 TSAVO VMS 000000004CFE 2 80ED5D00 SLYTHE VMS 000000004DD1 1 80EDDD00 AZSUN VMS 000000004D56 1 80EDDE00 CALSUN VMS 000000004EA4 1 80EDFC00 4X4TRK VMS 00000000FF26 1 80EE93C0 GNRS VMS 00000000FC2B 1 80EE94C0 IXIVIV VMS 000000004E56 1 80EF1A80 CLAIR VMS 000000004CDF 1 80EF1C00 INT4 VMS 00000000FD70 1 80EFDF80 SCOP VMS 00000000FC87 1 80EFFAC0 MOCKUP VMS 00000000FCD5 1 --- ARUSHA System Block (SB) 8493BC00 --- System ID 000000004CA1 Local software type VMS Max message size 216 Local software vers. V7.2 Max datagram size 576 Local software incarn. DF4AC300 Local hardware type ALPH 009F7570 Local hardware vers. 000000000003 SCS poller timeout 5AD3 040400000000 SCS poller enable mask 27 Status: 00000000
--- Path Block (PB) 80E55F80 --- Status: 0020 credit Remote sta. addr. 000000000016 Remote port type 00000010 Remote state ENAB Number of data paths 2 Remote hardware rev. 00000008 Cables state A-OK B-OK Remote func. mask ABFF0D00 Local state OPEN Reseting port 16 Port dev. name PNA0 Handshake retry cnt. 2 SCS MSGBUF address 80E4C528 Msg. buf. wait queue 80E55FB8 PDT address 80E2A180 --- Path Block (PB) 80ED0900 --- Status: 0020 credit Remote sta. addr. 0000000000DF Remote port type NI Remote state ENAB Number of data paths 2 Remote hardware rev. 00000104 Cables state A-OK B-OK Remote func. mask 83FF0180 Local state OPEN Reseting port 00 Port dev. name PEA0 Handshake retry cnt. 3 SCS MSGBUF address 80ED19A0 Msg. buf. wait queue 80ED0938 PDT address 80EC3C70 . . .

#2
SDA> SHOW CLUSTER/SCS VMScluster data structures -------------------------- --- SCS Listening Process Directory --- Entry Address Connection ID Process Name Information ------------- ------------- ------------ ----------- 80C71EC0 74D20000 SCS$DIRECTORY Directory Server 80C72100 74D20001 MSCP$TAPE NOT PRESENT HERE 80E16940 74D20002 MSCP$DISK MSCP$DISK 80E23B40 74D20003 VMS$SDA_AXP Remote SDA 80E23B40 74D20003 VMS$SDA_AXP Remote SDA 80E25540 74D20004 VMS$VAXcluster ................ 80E29E80 74D20005 SCA$TRANSPORT 813020C0 74D20053 PATHWORKScluster .....TurboServer --- SCS Systems Summary --- SB Address Node Type System ID Paths ---------- ---- ---- --------- ----- 8493BC00 ARUSHA VMS 000000004CA1 2 80E23800 HSJ201 HSJ 4200101A1B20 1 80E3FF40 ORNOT VMS 000000004CA7 2 80E43F40 LOADQ VMS 000000004C31 2 80E473C0 HSJ300 HSJ 420010051D20 1 80E47CC0 HSJ101 HSJ 420010081720 1 80E47D40 HSJ100 HSJ 4200100B1520 1 80E478C0 HSJ600 HSJ 420010070920 1 80E49180 HSJ401 HSJ 4200100D0320 1 80E47DC0 HSJ301 HSJ 420010091F20 1 80E47E40 HSJ601 HSJ 4200100A0B20 1 80E49500 HSJ400 HSJ 4200100C0120 1 80E5BF80 CHOBE VMS 000000004CD6 2 80E5F080 ETOSHA VMS 000000004CF3 2 80E5FC00 VMS VMS 000000004C7A 2 80E4FF80 HSJ501 HSJ 4200101C0720 1 80E5FD80 HSJ200 HSJ 420010191920 1 80E5FE80 HSJ500 HSJ 4200101B0520 1 80E5FE00 IPL31 VMS 000000004F52 2 80E59F80 ZAPNOT VMS 000000004CBB 2 80E61F80 ALTOS VMS 000000004D0F 2 80E72000 TSAVO VMS 000000004CFE 2 80ED5D00 SLYTHE VMS 000000004DD1 1 80EDDD00 AZSUN VMS 000000004D56 1 80EDDE00 CALSUN VMS 000000004EA4 1 80EDFC00 4X4TRK VMS 00000000FF26 1 80EE93C0 GNRS VMS 00000000FC2B 1 80EE94C0 IXIVIV VMS 000000004E56 1 80EF1A80 CLAIR VMS 000000004CDF 1 80EF1C00 INT4 VMS 00000000FD70 1 80EFDF80 SCOP VMS 00000000FC87 1 80EFFAC0 MOCKUP VMS 00000000FCD5 1 --- ARUSHA System Block (SB) 8493BC00 --- System ID 000000004CA1 Local software type VMS Max message size 216 Local software vers. V7.2 Max datagram size 576 Local software incarn. DF4AC300 Local hardware type ALPH 009F7570 Local hardware vers. 000000000003 SCS poller timeout 5AD3 040400000000 SCS poller enable mask 27 Status: 00000000 --- Path Block (PB) 80E55F80 --- Status: 0020 credit Remote sta. addr. 000000000016 Remote port type 00000010 Remote state ENAB Number of data paths 2 Remote hardware rev. 00000008 Cables state A-OK B-OK Remote func. mask ABFF0D00 Local state OPEN Reseting port 16 Port dev. name PNA0 Handshake retry cnt. 2 SCS MSGBUF address 80E4C528 Msg. buf. wait queue 80E55FB8 PDT address 80E2A180 --- Path Block (PB) 80ED0900 --- Status: 0020 credit Remote sta. addr. 0000000000DF Remote port type NI Remote state ENAB Number of data paths 2 Remote hardware rev. 00000104 Cables state A-OK B-OK Remote func. mask 83FF0180 Local state OPEN Reseting port 00 Port dev. name PEA0 Handshake retry cnt. 3 SCS MSGBUF address 80ED19A0 Msg. buf. wait queue 80ED0938 PDT address 80EC3C70 . . .

This example illustrates the output of the SHOW CLUSTER /SCS command.

SHOW CONNECTIONS

Displays information about all active connections between System Communications Services (SCS) processes or a single connection.

Format

SHOW CONNECTIONS [{/ADDRESS=cdt-address |/NODE=name |/SYSAP=name }]

Parameters

None.

Qualifiers

/ADDRESS=cdt-address
Displays information contained in the connection descriptor table (CDT) for a specific connection. You can find the cdt-address for any active connection on the system in the CDT summary page display of the SHOW CONNECTIONS command. In addition, CDT addresses are stored in many individual data structures related to SCS connections. These data structures include class driver request packets (CDRPs) and unit control blocks (UCBs) for class drivers that use SCS, and cluster system blocks (CSBs) for the connection manager.
/NODE=name
Displays all CDTs associated with the specified remote SCS node name.
/SYSAP=name
Displays all CDTs associated with the specified local SYSAP.

Description

The SHOW CONNECTIONS command provides a series of displays.
The CDT summary page lists information regarding each connection on the local system, including the following:

CDT address
Name of the local process with which the CDT is associated
Connection ID
Current state
Name of the remote node (if any) to which it is currently connected

The CDT summary page concludes with a count of CDTs that are free and available to the system.
SHOW CONNECTIONS next displays a page of detailed information for each active CDT listed previously.

Example


SDA> SHOW CONNECTIONS --- CDT Summary Page --- CDT Address Local Process Connection ID State Remote Node ----------- ------------- ------------- ----- ----------- 805E7ED0 SCS$DIRECTORY FF120000 listen 805E8030 MSCP$TAPE FF120001 listen 805E8190 VMS$VMScluster FF120002 listen 805E82F0 MSCP$DISK FF120003 listen 805E8450 SCA$TRANSPORT FF120004 listen 805E85B0 MSCP$DISK FF150005 open VANDQ1 805E8710 VMS$VMScluster FF120006 open VANDQ1 805E8870 VMS$VMScluster FF120007 open ROMRDR 805E89D0 MSCP$DISK FF120008 open ROMRDR 805E8C90 VMS$DISK_CL_DRVR FF12000A open ROMRDR 805E8DF0 VMS$DISK_CL_DRVR FF12000B open VANDQ1 805E8F50 VMS$TAPE_CL_DRVR FF12000C open VANDQ1 Number of free CDT's: 188 --- Connection Descriptor Table (CDT) 80C44850 --- State: 0001 listen Local Process: MSCP$TAPE Blocked State: 0000 Local Con. ID 899F0003 Datagrams sent 0 Message queue 80C4488C Remote Con. ID 00000000 Datagrams rcvd 0 Send Credit Q. 80C44894 Receive Credit 0 Datagram discard 0 PB address 00000000 Send Credit 0 Message Sends 0 PDT address 00000000 Min. Rec. Credit 0 Message Recvs 0 Error Notify 822FFCC0 Pend Rec. Credit 0 Mess Sends NoFP 0 Receive Buffer 00000000 Initial Rec. Credit 0 Mess Recvs NoFP 0 Connect Data 00000000 Rem. Sta. 000000000000 Send Data Init. 0 Aux. Structure 00000000 Rej/Disconn Reason 0 Req Data Init. 0 Fast Recvmsg Rq 00000000 Queued for BDLT 0 Bytes Sent 0 Fast Recvmsg PM 00000000 Queued Send Credit 0 Bytes rcvd 0 Change Affinity 00000000 Total bytes map 0 --- Connection Descriptor Table (CDT) 805E8030 --- State: 0001 listen Local Process: MSCP$TAPE Blocked State: 0000 Local Con. ID FF120001 Datagrams sent 0 Message queue 805E8060 Remote Con. ID 00000000 Datagrams rcvd 0 Send Credit Q. 805E8068 Receive Credit 0 Datagram discard 0 PB address 00000000 Send Credit 0 Messages Sent 0 PDT address 00000000 Min. Rec. Credit 0 Messages Rcvd. 0 Error Notify 804540D0 Pend Rec. Credit 0 Send Data Init. 0 Receive Buffer 00000000 Initial Rec. Credit 0 Req Data Init. 0 Connect Data 00000000 Rem. Sta. 000000000000 Bytes Sent 0 Aux. Structure 00000000 Rej/Disconn Reason 0 Bytes rcvd 0 Queued for BDLT 0 Total bytes map 0 Queued Send Credit 0 . . .

SDA> SHOW CONNECTIONS
              --- CDT Summary Page ---
CDT Address   Local Process     Connection ID     State       Remote Node
-----------   -------------     -------------     -----       -----------
 805E7ED0     SCS$DIRECTORY       FF120000        listen       
 805E8030     MSCP$TAPE           FF120001        listen       
 805E8190     VMS$VMScluster      FF120002        listen       
 805E82F0     MSCP$DISK           FF120003        listen       
 805E8450     SCA$TRANSPORT       FF120004        listen       
 805E85B0     MSCP$DISK           FF150005        open         VANDQ1
 805E8710     VMS$VMScluster      FF120006        open         VANDQ1
 805E8870     VMS$VMScluster      FF120007        open         ROMRDR
 805E89D0     MSCP$DISK           FF120008        open         ROMRDR
 805E8C90     VMS$DISK_CL_DRVR    FF12000A        open         ROMRDR
 805E8DF0     VMS$DISK_CL_DRVR    FF12000B        open         VANDQ1
 805E8F50     VMS$TAPE_CL_DRVR    FF12000C        open         VANDQ1
Number of free CDT's:  188
          --- Connection Descriptor Table (CDT) 80C44850 ---
State:  0001 listen               Local Process:        MSCP$TAPE
Blocked State:  0000
Local Con. ID   899F0003    Datagrams sent         0    Message queue   80C4488C
Remote Con. ID  00000000    Datagrams rcvd         0    Send Credit Q.  80C44894
Receive Credit         0    Datagram discard       0    PB address      00000000
Send Credit            0    Message Sends          0    PDT address     00000000
Min. Rec. Credit       0    Message Recvs          0    Error Notify    822FFCC0
Pend Rec. Credit       0    Mess Sends NoFP        0    Receive Buffer  00000000
Initial Rec. Credit    0    Mess Recvs NoFP        0    Connect Data    00000000
Rem. Sta.   000000000000    Send Data Init.        0    Aux. Structure  00000000
Rej/Disconn Reason     0    Req Data Init.         0    Fast Recvmsg Rq 00000000
Queued for BDLT        0    Bytes Sent             0    Fast Recvmsg PM 00000000
Queued Send Credit     0    Bytes rcvd             0    Change Affinity 00000000
                            Total bytes map        0
      --- Connection Descriptor Table (CDT) 805E8030 ---
State:  0001 listen           Local Process:        MSCP$TAPE       
Blocked State:  0000 
Local Con. ID   FF120001    Datagrams sent         0    Message queue   805E8060
Remote Con. ID  00000000    Datagrams rcvd         0    Send Credit Q.  805E8068
Receive Credit         0    Datagram discard       0    PB address      00000000
Send Credit            0    Messages Sent          0    PDT address     00000000
Min. Rec. Credit       0    Messages Rcvd.         0    Error Notify    804540D0
Pend Rec. Credit       0    Send Data Init.        0    Receive Buffer  00000000
Initial Rec. Credit    0    Req Data Init.         0    Connect Data    00000000
Rem. Sta.   000000000000    Bytes Sent             0    Aux. Structure  00000000
Rej/Disconn Reason     0    Bytes rcvd             0                            
Queued for BDLT        0    Total bytes map        0                            
Queued Send Credit     0                                                        
   .
   .
   .

This example shows the default output of the SHOW CONNECTIONS command.

SHOW CPU

When analyzing a dump, displays information about the state of a CPU at the time of the system failure.

Note
SHOW CPU is only valid when you are analyzing a crash dump. It is not a valid command when you are analyzing the running system, because all the CPU-specific information may not be available.

Format

SHOW CPU [cpu-id]

Parameter

cpu-id
Numeric value from 00 to 1F₁₆ indicating the identity of the CPU for which context information is to be displayed. If you specify a value outside this range, or you specify the cpu-id of a CPU that was not active at the time of the system failure, SDA displays the following message:
%SDA-E-CPUNOTVLD, CPU not booted or CPU number out of range
If you use the cpu-id parameter, the SHOW CPU command performs an implicit SET CPU command, making the CPU indicated by cpu-id the current CPU for subsequent SDA commands. (See the description of the SET CPU command and Chapter 2, Section 2.5 for information on how this can affect the CPU context---and process context---in which SDA commands execute.)

Qualifiers

None.

Description

The SHOW CPU command displays system failure information about the CPU specified by cpu-id or, by default, the SDA current CPU, as defined in Chapter 2, Section 2.5. You cannot use the SHOW CPU command when examining the running system with SDA.
The SHOW CPU command produces several displays. First, there is a brief description of the system failure and its environment that includes the following:
Reason for the bugcheck.
Name of the currently executing process. If no process has been scheduled on this CPU, SDA displays the following message:
Process currently executing: no processes currently scheduled on the processor
File specification of the image executing within the current process (if there is a current process).
Interrupt priority level (IPL) of the CPU at the time of the system failure.
The CPU database address.
The CPU's capability set.
Next, the general registers display shows the contents of the CPU's integer registers (R0 to R30), and the AI, RA, PV, FP, PC, and PS at the time of the system failure.
The processor registers display consists of the following parts:

Common processor registers
Processor-specific registers
Stack pointers

The first part of the processor registers display includes registers common to all Alpha processors, which are used by the operating system to maintain the current process virtual address space, system space, or other system functions. This part of the display includes the following registers:

Hardware privileged context block base register (PCBB)
System control block base register (SCBB)
Software interrupt summary register (SISR)
Address space number register (ASN)
AST summary register (ASTSR)
AST enable register (ASTEN)
Interrupt priority level register (IPL)
Processor priority level register (PRBR)
Page table base register (PTBR)
Virtual page table base register (VPTB)
Floating point control register (FPCR)
Machine check error summary register (MCES)

The last part of the display includes the four stack pointers: the pointers of the kernel, executive, supervisor, and user stacks (KSP, ESP, SSP, and USP, respectively).
The SHOW CPU command concludes with a listing of the spinlocks, if any, owned by the CPU at the time of the system failure, reproducing some of the information given by the SHOW SPINLOCKS command. The spinlock display includes the following information:

Name of the spinlock.
Address of the spinlock data structure (SPL).
The owning CPU's CPU ID.
IPL of the spinlock.
Indication of the depth of this CPU's ownership of the spinlock. A number greater than 1 indicates that this CPU has nested acquisitions of the spinlock.
Rank of the spinlock.
Timeout interval for spinlock acquisition (in terms of 10 milliseconds).
Shared array (shared spinlock context block pointers)

Example


SDA> SHOW CPU 0 CPU 00 Processor crash information ---------------------------------- CPU 00 reason for Bugcheck: CPUEXIT, Shutdown requested by another CPU Process currently executing on this CPU: None Current IPL: 31 (decimal) CPU database address: 81414000 CPUs Capabilities: PRIMARY,QUORUM,RUN General registers: R0 = FFFFFFFF.81414000 R1 = FFFFFFFF.81414000 R2 = 00000000.00000000 R3 = FFFFFFFF.810AD960 R4 = 00000000.01668E90 R5 = 00000000.00000001 R6 = 66666666.66666666 R7 = 77777777.77777777 R8 = FFFFFFFF.814FB040 R9 = 99999999.99999999 R10 = FFFFFFFF.814FB0C0 R11 = BBBBBBBB.BBBBBBBB R12 = CCCCCCCC.CCCCCCCC R13 = FFFFFFFF.810AD960 R14 = FFFFFFFF.81414018 R15 = 00000000.00000004 R16 = 00000000.000006AC R17 = 00000000.00000047 R18 = 00000000.00000000 R19 = 00000000.00000000 R20 = FFFFFFFF.8051A494 R21 = 00000000.00000000 R22 = 00000000.00000001 R23 = 00000000.00000010 R24 = FFFFFFFF.81414000 AI = FFFFFFFF.81414000 RA = FFFFFFFF.81006000 PV = 00000001.FFFFFFFF R28 = 00000000.00000000 FP = FFFFFFFF.88ABDFD0 PC = FFFFFFFF.8009C95C PS = 18000000.00001F04 Processor Internal Registers: ASN = 00000000.00000000 ASTSR/ASTEN = 00000000 IPL = 0000001F PCBB = 00000000.01014080 PRBR = FFFFFFFF.81414000 PTBR = 00000000.0000FFBF SCBB = 00000000.000001E8 SISR = 00000000.00000100 VPTB = FFFFFEFC.00000000 FPCR = 00000000.00000000 MCES = 00000000.00000000 KSP = FFFFFFFF.88ABDCD8 ESP = FFFFFFFF.88ABF000 SSP = FFFFFFFF.88AB9000 USP = FFFFFFFF.88AB9000 Spinlocks currently owned by CPU 00 SCS Address 810AF300 Owner CPU ID 00000000 IPL 00000008 Ownership Depth 00000000 Rank 0000001A Timeout Interval 002DC6C0 Share Array 00000000

SDA> SHOW CPU 0
CPU 00 Processor crash information
----------------------------------
CPU 00 reason for Bugcheck: CPUEXIT, Shutdown requested by another CPU 
 
Process currently executing on this CPU:   None 
 
Current IPL: 31  (decimal) 
 
CPU database address:  81414000 
 
CPUs Capabilities:    PRIMARY,QUORUM,RUN 
 
General registers: 
 
R0   = FFFFFFFF.81414000  R1   = FFFFFFFF.81414000  R2   = 00000000.00000000 
R3   = FFFFFFFF.810AD960  R4   = 00000000.01668E90  R5   = 00000000.00000001 
R6   = 66666666.66666666  R7   = 77777777.77777777  R8   = FFFFFFFF.814FB040 
R9   = 99999999.99999999  R10  = FFFFFFFF.814FB0C0  R11  = BBBBBBBB.BBBBBBBB 
R12  = CCCCCCCC.CCCCCCCC  R13  = FFFFFFFF.810AD960  R14  = FFFFFFFF.81414018 
R15  = 00000000.00000004  R16  = 00000000.000006AC  R17  = 00000000.00000047 
R18  = 00000000.00000000  R19  = 00000000.00000000  R20  = FFFFFFFF.8051A494 
R21  = 00000000.00000000  R22  = 00000000.00000001  R23  = 00000000.00000010 
R24  = FFFFFFFF.81414000  AI   = FFFFFFFF.81414000  RA   = FFFFFFFF.81006000 
PV   = 00000001.FFFFFFFF  R28  = 00000000.00000000  FP   = FFFFFFFF.88ABDFD0 
PC   = FFFFFFFF.8009C95C  PS   = 18000000.00001F04 
 
Processor Internal Registers: 
 
ASN  = 00000000.00000000                     ASTSR/ASTEN =          00000000 
IPL  =          0000001F  PCBB = 00000000.01014080  PRBR = FFFFFFFF.81414000 
PTBR = 00000000.0000FFBF  SCBB = 00000000.000001E8  SISR = 00000000.00000100 
VPTB = FFFFFEFC.00000000  FPCR = 00000000.00000000  MCES = 00000000.00000000 
 
        KSP    = FFFFFFFF.88ABDCD8 
        ESP    = FFFFFFFF.88ABF000 
        SSP    = FFFFFFFF.88AB9000 
        USP    = FFFFFFFF.88AB9000 
 
                Spinlocks currently owned by CPU 00 
 
SCS                                    Address        810AF300 
Owner CPU ID       00000000            IPL            00000008 
Ownership Depth    00000000            Rank           0000001A 
Timeout Interval   002DC6C0            Share Array    00000000

This example shows the default output of the SHOW CPU command.

SHOW CRASH

Displays information about the state of the system at the time of failure. Provides a system information identifying a running system.

Format

SHOW CRASH [/CPU=n]

Parameters

None.

Qualifier

/CPU=n
Allows exception data to be displayed from CPUs other than the one considered as the crash CPU when more than one CPU crashes simultaneously.

Description

The SHOW CRASH command has two different functions, depending on whether you use it to analyze a running system or a system failure.
When used during the analysis of a running system, the SHOW CRASH command produces a display that describes the system and the version of OpenVMS Alpha that it is running. The system crash information display contains the following information:

Name and version number of the operating system
Major and minor IDs of the operating system
Identity of the Alpha system, including an indication of its cluster membership
CPU ID of the primary CPU
Address of all CPU databases

When used during the analysis of a system failure, the SHOW CRASH command produces several displays that identify the system and describe its state at the time of the failure.
If the current CPU context for SDA is not that of the processor that signaled the bugcheck, or the CPU specified with the /CPU=n qualifier, the SHOW CRASH command first performs an implicit SET CPU command to make that processor the current CPU for SDA. (See the description of the SET CPU command and Chapter 2, Section 2.5 for a discussion of how this can affect the CPU context---and process context---in which SDA commands execute.)
The system crash information display in this context provides the following information:
Date and time of the system failure.
Name and version number of the operating system.
Major and minor IDs of the operating system.
Identity of the system.
CPU IDs of both the primary CPU and the CPU that initiated the bugcheck. In a uniprocessor Alpha system, these IDs are identical.
Bitmask of the active and available CPUs in the system.
For each active processor in the system, the name of the bugcheck that caused the system failure. Generally, there will be only one significant bugcheck in the system. All other processors typically display the following as their reason for taking a bugcheck:
CPUEXIT, Shutdown requested by another CPU
Subsequent screens of the SHOW CRASH command display information about the state of each active processor on the system at the time of the system failure. The information in these screens is identical to that produced by the SHOW CPU command, including the general-purpose registers, processor-specific registers, stack pointers, and records of spinlock ownership. The first such screen presents information about the processor that caused the failure; others follow according to the numeric order of their CPU IDs.

Examples

#1
SDA> SHOW CRASH System crash information ------------------------ Time of system crash: 1-JAN-2001 00:00:00.00 Version of system: OpenVMS (TM) Alpha Operating System, Version X901-SSB System Version Major ID/Minor ID: 3/0 VMScluster node: VMSTS6, a Crash CPU ID/Primary CPU ID: 00/00 Bitmask of CPUs active/available: 00000001/00000001 CPU bugcheck codes: CPU 00 -- INVEXCEPTN, Exception while above ASTDEL System State at Time of Exception --------------------------------- Exception Frame: ---------------- R2 = FFFFFFFF.810416C0 SCS$GA_LOCALSB+005C0 R3 = FFFFFFFF.81007E60 EXE$GPL_HWRPB_L R4 = FFFFFFFF.850AEB80 R5 = FFFFFFFF.81041330 SCS$GA_LOCALSB+00230 R6 = FFFFFFFF.81038868 CON$INITLINE R7 = FFFFFFFF.81041330 SCS$GA_LOCALSB+00230 PC = FFFFFFFF.803EF81C SYS$TTDRIVER+0F81C PS = 30000000.00001F04 FFFFFFFF.803EF80C: STL R24,#X0060(R5) FFFFFFFF.803EF810: LDL R28,#X0138(R5) FFFFFFFF.803EF814: BIC R28,R27,R28 FFFFFFFF.803EF818: 00000138 PC => FFFFFFFF.803EF81C: HALT FFFFFFFF.803EF820: HALT FFFFFFFF.803EF824: BR R31,#XFF0000 FFFFFFFF.803EF828: LDL R24,#X0138(R5) FFFFFFFF.803EF82C: BIC R24,#X40,R24 PS => MBZ SPAL MBZ IPL VMM MBZ CURMOD INT PRVMOD de 0 30 00000000000 1F 0 0 KERN 1 KERN Signal Array ------------ Length = 00000003 Type = 0000043C Arg = FFFFFFFF.803EF81C SYS$TTDRIVER+0F81C Arg = 30000000.00001F04 %SYSTEM-F-OPCDEC, opcode reserved to Digital fault at PC=FFFFFFFF803EF81C, PS=00001F04 Saved Scratch Registers in Mechanism Array ------------------------------------------ R0 = 00000000.00000000 R1 = FFFFFFFF.811998B8 R16 = 00000000.00001000 R17 = FFFFFFFF.8119B1F0 R18 = 00000000.00000010 R19 = FFFFFFFF.810194F0 R20 = 00000000.00000000 R21 = 0000000F.00000000 R22 = 00000000.00000000 R23 = 00000000.00004000 R24 = 00000000.00001000 R25 = 00000000.00000000 R26 = FFFFFFFF.81041474 R27 = 00000000.00004000 R28 = 00000000.00001000 . . . (CPU-specific display omitted) . . .

SDA> SHOW CRASH
System crash information
------------------------
Time of system crash:  1-JAN-2001 00:00:00.00 
 
Version of system: OpenVMS (TM) Alpha Operating System, Version X901-SSB 
 
System Version Major ID/Minor ID: 3/0 
 
VMScluster node: VMSTS6, a 
 
Crash CPU ID/Primary CPU ID:  00/00 
 
Bitmask of CPUs active/available:  00000001/00000001 
 
CPU bugcheck codes: 
        CPU 00 -- INVEXCEPTN, Exception while above ASTDEL 
 
System State at Time of Exception 
--------------------------------- 
Exception Frame: 
---------------- 
        R2  = FFFFFFFF.810416C0  SCS$GA_LOCALSB+005C0 
        R3  = FFFFFFFF.81007E60  EXE$GPL_HWRPB_L 
        R4  = FFFFFFFF.850AEB80 
        R5  = FFFFFFFF.81041330  SCS$GA_LOCALSB+00230 
        R6  = FFFFFFFF.81038868  CON$INITLINE 
        R7  = FFFFFFFF.81041330  SCS$GA_LOCALSB+00230 
        PC  = FFFFFFFF.803EF81C  SYS$TTDRIVER+0F81C 
        PS  = 30000000.00001F04 
 
         FFFFFFFF.803EF80C:     STL             R24,#X0060(R5) 
         FFFFFFFF.803EF810:     LDL             R28,#X0138(R5) 
         FFFFFFFF.803EF814:     BIC             R28,R27,R28 
         FFFFFFFF.803EF818:    00000138 
   PC => FFFFFFFF.803EF81C:     HALT 
         FFFFFFFF.803EF820:     HALT 
         FFFFFFFF.803EF824:     BR              R31,#XFF0000 
         FFFFFFFF.803EF828:     LDL             R24,#X0138(R5) 
         FFFFFFFF.803EF82C:     BIC             R24,#X40,R24 
 
   PS => 
         MBZ SPAL      MBZ    IPL VMM MBZ CURMOD INT PRVMOD de   0   30   00000000000 1F  0   0   KERN   1   KERN 
 
Signal Array 
------------ 
        Length = 00000003 
        Type   = 0000043C 
        Arg    = FFFFFFFF.803EF81C  SYS$TTDRIVER+0F81C 
        Arg    = 30000000.00001F04 
%SYSTEM-F-OPCDEC, opcode reserved to Digital fault at PC=FFFFFFFF803EF81C, PS=00001F04 
 
Saved Scratch Registers in Mechanism Array 
------------------------------------------ 
R0   = 00000000.00000000  R1   = FFFFFFFF.811998B8  R16  = 00000000.00001000 
R17  = FFFFFFFF.8119B1F0  R18  = 00000000.00000010  R19  = FFFFFFFF.810194F0 
R20  = 00000000.00000000  R21  = 0000000F.00000000  R22  = 00000000.00000000 
R23  = 00000000.00004000  R24  = 00000000.00001000  R25  = 00000000.00000000 
R26  = FFFFFFFF.81041474  R27  = 00000000.00004000  R28  = 00000000.00001000 
 
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                           (CPU-specific display omitted) 
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This long display reflects the output of the SHOW CRASH command within the analysis of a system failure.

#2
SDA> SHOW CRASH System crash information ------------------------ Time of system crash: 12-OCT-2000 11:27:58.02 Version of system: OpenVMS (TM) Alpha Operating System, Version X74B-FT2 System Version Major ID/Minor ID: 3/0 System type: DEC 3000 Model 400 Crash CPU ID/Primary CPU ID: 00/00 Bitmask of CPUs active/available: 00000001/00000001 CPU bugcheck codes: CPU 00 -- PGFIPLHI, Pagefault with IPL too high System State at Time of Page Fault: ----------------------------------- Page fault for address 00000000.00046000 occurred at IPL: 8 Memory management flags: 00000000.00000001 (instruction fetch) Exception Frame: ---------------- R2 = 00000000.00000003 R3 = FFFFFFFF.810B9280 EXCEPTION_MON+39C80 R4 = FFFFFFFF.81564540 PCB R5 = 00000000.00000088 R6 = 00000000.000458B0 R7 = 00000000.7FFA1FC0 PC = 00000000.00046000 PS = 20000000.00000803 00000000.00045FF0: LDQ R2,#X0050(FP) 00000000.00045FF4: LDQ R12,#X0058(FP) 00000000.00045FF8: LDQ R13,#X0060(FP) 00000000.00045FFC: LDQ R14,#X0068(FP) PC => 00000000.00046000: BIS R1,R17,R1 00000000.00046004: BIS R31,#X01,R25 00000000.00046008: STQ_U R1,#X0002(R10) 00000000.0004600C: BSR R26,#X00738C 00000000.00046010: LDQ_U R16,#X0002(R10) PS => MBZ SPAL MBZ IPL VMM MBZ CURMOD INT PRVMOD de 0 20 00000000000 08 0 0 KERN 0 USER . . . (CPU-specific display omitted) . . .

SDA> SHOW CRASH
System crash information
------------------------
Time of system crash: 12-OCT-2000 11:27:58.02 
 
Version of system: OpenVMS (TM) Alpha Operating System, Version X74B-FT2 
 
System Version Major ID/Minor ID: 3/0 
 
System type: DEC 3000 Model 400 
 
Crash CPU ID/Primary CPU ID:  00/00 
 
Bitmask of CPUs active/available:  00000001/00000001 
 
CPU bugcheck codes: 
        CPU 00 -- PGFIPLHI, Pagefault with IPL too high 
 
System State at Time of Page Fault: 
----------------------------------- 
 
Page fault for address 00000000.00046000 occurred at IPL: 8 
Memory management flags: 00000000.00000001 (instruction fetch) 
 
Exception Frame: 
---------------- 
        R2  = 00000000.00000003 
        R3  = FFFFFFFF.810B9280  EXCEPTION_MON+39C80 
        R4  = FFFFFFFF.81564540  PCB 
        R5  = 00000000.00000088 
        R6  = 00000000.000458B0 
        R7  = 00000000.7FFA1FC0 
        PC  = 00000000.00046000 
        PS  = 20000000.00000803 
 
         00000000.00045FF0:     LDQ             R2,#X0050(FP) 
         00000000.00045FF4:     LDQ             R12,#X0058(FP) 
         00000000.00045FF8:     LDQ             R13,#X0060(FP) 
         00000000.00045FFC:     LDQ             R14,#X0068(FP) 
   PC => 00000000.00046000:     BIS             R1,R17,R1 
         00000000.00046004:     BIS             R31,#X01,R25 
         00000000.00046008:     STQ_U           R1,#X0002(R10) 
         00000000.0004600C:     BSR             R26,#X00738C 
         00000000.00046010:     LDQ_U           R16,#X0002(R10) 
 
   PS => 
         MBZ SPAL      MBZ    IPL VMM MBZ CURMOD INT PRVMOD de   0   20   00000000000 08  0   0   KERN   0   USER 
 
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                                        (CPU-specific display omitted) 
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This display reflects the output of a SHOW CRASH command within the analysis of a PGFIPLHI bugcheck.

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