Large output leads to semaphore exceeding limit crash.

[fsword7]

I tested some more. I tried execute 'dir/full sys$system'. It crashed in middle of large output results. It scrolls so fast like in SIMH VAX emulator (almost same speed match). Take a look on crash information at end.

Tim

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$ dir/full sys$system

: :

OPENVMS$FTP.EXE;1 File ID: (3763,1,0)
Size: 6/16 Owner: [SYSTEM] Created: 21-DEC-2016 13:39:23.01 Modified: 21-DEC-2016 13:39:23.01 (1) Expires: <None specified> Backup: <No backup recorded> Effective: <None specified> Recording: <None specified> Accessed: 17-NOV-2020 21:13:22.46 Attr Mod: 21-DEC-2016 13:39:23.01 Data Mod: 21-DEC-2016 13:39:23.01 Linkcount: 1 File organization: Sequential Shelved state: Online Caching attribute: Writethrough File attributes: Allocation: 16, Extend: 0, Global buffer count: 0 No version limit, Contiguous best try Record format: Fixed length 512 byte records Record attributes: None RMS attributes: None Journaling enabled: None File protection: System:RWED, Owner:RWED, Group:RE, World:RE Access Cntrl List: None Client attributes: None

OPENVMS$FTPDIR.EXE;1 File ID: (3764,1,0)
Size: 6/16 Owner: [SYSTEM] Created: 21-DEC-2016 13:39:23.06 Modified: 21-DEC-2016 13:39:23.07 (1) Expires: <None specified> Backup: <No backup recorded> Effective: <None specified> Recording: <None specified> Accessed: 17-NOV-2020 21:13:22.49 Attr Mod: 21-DEC-2016 13:39:23.07 Data Mod: 21-DEC-2016 13:39:23.07 Linkcount: 1 File organization: Sequential Shelved state: Online Caching attribute: Writethrough File attributes: Allocation: 16, Extend: 0, Global buffer count: 0 No version limit, Contiguous best try Record format: Fixed length 512 byte records Record attributes: None RMS attributes: None Journaling enabled: None File protection: System:RWED, Owner:RWED, Group:RE, World:RE Access Cntrl List: None Connection closed by foreign host. sword7@tsux1vm:~/axpbox/data$

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Exception in CPU thread: System exception: cannot signal semaphore: count would exceed maximum. Emulator Failure: Threading error: CPU thread has died: /home/sword7/axpbox/src/src/AlphaCPU.cpp, line 517 Stop threads: cpu0 srl0 symException in SYM thread: Threading error: Locking error (Timeout: /home/sword7/axpbox/src/src/base/Mutex.cpp, line 124) trying to lock mutex sym-reg from thread . : /home/sword7/axpbox/src/src/base/Mutex.cpp, line 128. ali kbd Freeing memory in use by system... pci0.1(sym53c810).disk0.0(file): Closing file.

[lenticularis39]

Thank you for this interesting observation - this is the first CPU-related bug I know of (besides the memtest skip hack, but that one I introduced myself).

I tried to reproduce this with the (slower) IDE controller with no success - trying again with the significantly faster SCSI controller.

[fsword7]

Yes, AXP emulator is enough fast. I ran VUPS and got 63.0 as result on my PC with i7-8800K (z370 chipset).