[2MB -> hex=20 0000 - bin=0010 0000 0000 0000 0000 0000 - dec=2097152]
This behavior is not observable on the integrity and Alpha platforms.
Is there a specific VMS design reason why this happens on the x86-64 platform ?
/Maurizio
--- x86-64 tests ---
Code: Select all
system_dirac_opa0 >mc sysgen sho npagedyn
Parameter Name Current Default Min. Max. Unit Dynamic
-------------- ------- ------- ------- ------- ---- -------
NPAGEDYN 262144000 4194304 163840 1879048192 Bytes
NPAGEDYN_S2 5 2 2 1024 MBytes
<250MB = 262144000 bytes>
system_dirac_opa0 >sho mem/pool/full
System Memory Resources on 2-MAR-2024 18:14:56.38
Nonpaged Dynamic Memory (Lists + Variable)
Current Size (MB) >252.00< Current Size (Pagelets) 516096
Initial Size (MB) 252.00 Initial Size (Pagelets) 516096
Maximum Size (MB) 708.00 Maximum Size (Pagelets) 1449984
Free Space (MB) 249.16 Space in Use (MB) 2.83
Largest Var Block (MB) 249.05 Smallest Var Block (bytes) 64
Number of Free Blocks 246 Free Blocks LEQU 64 bytes 123
Free Blocks on Lookasides 119 Lookaside Space (KB) 96.37
USB Addressable Memory (Lists + Variable)
Current Size (KB) 1024.00 Current Size (Pagelets) 2048
Initial Size (KB) 0.00 Initial Size (Pagelets) 0
Free Space (KB) 1022.87 Space in Use (KB) 1.12
Largest Var Block (KB) 1022.87 Smallest Var Block (KB) 1022.87
Number of Free Blocks 1 Free Blocks LEQU 64 bytes 0
Free Blocks on Lookasides 0 Lookaside Space (bytes) 0
Paged Dynamic Memory (Lists + Variable)
Current Size (MB) 11.96 Current Size (Pagelets) 24496
Free Space (MB) 6.54 Space in Use (MB) 5.41
Largest Var Block (MB) 6.53 Smallest Var Block (bytes) 16
Number of Free Blocks 33 Free Blocks LEQU 64 bytes 7
Free Blocks on Lookasides 30 Lookaside Space (KB) 2.93
Lock Manager Dynamic Memory
Current Size (MB) 89.51 Current Size (Pages) 11458
Free Space (MB) 84.71 Hits 2944
Space in Use (MB) 4.79 Misses 0
Number of Empty Pages 11353 Expansions 11458
Number of Free Packets 292194 Packet Size (bytes) 0
S2 Nonpaged Dynamic Memory (Lists + Variable)
Current Size (MB) 7.96 Current Size (Pagelets) 16304
Initial Size (MB) 7.96 Initial Size (Pagelets) 16304
Maximum Size (MB) 11.96 Maximum Size (Pagelets) 24496
Free Space (MB) 7.74 Space in Use (MB) 0.21
Largest Var Block (MB) 7.74 Smallest Var Block (MB) 7.74
Number of Free Blocks 1 Free Blocks LEQU 256 byte 0
Free Blocks on Lookasides 0 Lookaside Space (bytes) 0
system_dirac_opa0 >ana/system
SDA> clue mem/layout
...
System Virtual Address Space Layout:
------------------------------------
Item Base End Length
System Process Header FFFFFFFF.81400000 FFFFFFFF.8141E000 00000000.0001E000
S0 Error Log Buffers FFFFFFFF.81420000 FFFFFFFF.8142A000 00000000.0000A000
Paged Pool FFFFFFFF.8142A000 FFFFFFFF.82020000 00000000.00BF6000
Nonpaged Pool (initial size) FFFFFFFF.82400000 FFFFFFFF.92000000->00000000.0FC00000<-252MB !
Nonpaged Pool Expansion Area FFFFFFFF.92000000 FFFFFFFF.AE800000 00000000.1C800000
S0S1 Resident Image Code Region FFFFFFFF.AEBFE000 FFFFFFFF.B03FE000 00000000.01800000
S0S1 Resident Image Data Region FFFFFFFF.B03FE000 FFFFFFFF.B07FE000 00000000.00400000
S0 Read-Only Data Region FFFFFFFF.B0800000 FFFFFFFF.B1000000 00000000.00800000
S0 Read-Only Resident Data Region FFFFFFFF.B1000000 FFFFFFFF.B1800000 00000000.00800000
908 Balance Slots, 4 pages each FFFFFFFF.B1800000 FFFFFFFF.B3460000 00000000.01C60000
USB Addressable Memory FFFFFFFF.B3460000 FFFFFFFF.B3560000 00000000.00100000
Erase Pattern Buffer Page FFFFFFFF.B3618000 FFFFFFFF.B361A000 00000000.00002000
Erase Pattern Page FFFFFFFF.B361A000 FFFFFFFF.B361C000 00000000.00002000
Demand Zero Optimization Page FFFFFFFF.B3626000 FFFFFFFF.B3628000 00000000.00002000
Window Page 1 FFFFFFFF.B3630000 FFFFFFFF.B3632000 00000000.00002000
Window Page 2 FFFFFFFF.B3632000 FFFFFFFF.B3634000 00000000.00002000
Fork Buffers Secondary to Primary FFFFFFFF.B3D88000 FFFFFFFF.B3D8A000 00000000.00002000
Swapper Process Kernel Stack FFFFFFFF.B3DB9E00 FFFFFFFF.B3DD1E00 00000000.00018000
...
system_dirac_opa0 >mc sysgen sho npagedyn
Parameter Name Current Default Min. Max. Unit Dynamic
-------------- ------- ------- ------- ------- ---- -------
NPAGEDYN 262144000 4194304 163840 1879048192 Bytes
NPAGEDYN_S2 5 2 2 1024 MBytes
system_dirac_opa0 >mc sysgen
SYSGEN> U C
SYSGEN> SET NPAGEDYN 157286400 ! = 150MB
SYSGEN> W C
SYSGEN>
%%%%%%%%%%% OPCOM 2-MAR-2024 18:30:16.54 %%%%%%%%%%%
Message from user SYSTEM on DIRAC
%SYSGEN-I-WRITECUR, CURRENT system parameters modified by process ID 00000431 into file SYS$SYSROOT_MD:[SYSEXE]X86_64VMSSYS.PAR;1
SYSGEN> EXIT
<reboot>
system_dirac_opa0 >sho mem/pool/full
System Memory Resources on 2-MAR-2024 18:32:18.66
Nonpaged Dynamic Memory (Lists + Variable)
Current Size (MB) >152.00< Current Size (Pagelets) 311296
Initial Size (MB) 152.00 Initial Size (Pagelets) 311296
Maximum Size (MB) 708.00 Maximum Size (Pagelets) 1449984
Free Space (MB) 149.16 Space in Use (MB) 2.83
Largest Var Block (MB) 149.09 Smallest Var Block (bytes) 64
Number of Free Blocks 177 Free Blocks LEQU 64 bytes 123
Free Blocks on Lookasides 51 Lookaside Space (KB) 68.00
USB Addressable Memory (Lists + Variable)
Current Size (KB) 1024.00 Current Size (Pagelets) 2048
Initial Size (KB) 0.00 Initial Size (Pagelets) 0
Free Space (KB) 1022.87 Space in Use (KB) 1.12
Largest Var Block (KB) 1022.87 Smallest Var Block (KB) 1022.87
Number of Free Blocks 1 Free Blocks LEQU 64 bytes 0
Free Blocks on Lookasides 0 Lookaside Space (bytes) 0
Paged Dynamic Memory (Lists + Variable)
Current Size (MB) 11.96 Current Size (Pagelets) 24496
Free Space (MB) 6.54 Space in Use (MB) 5.41
Largest Var Block (MB) 6.54 Smallest Var Block (bytes) 16
Number of Free Blocks 13 Free Blocks LEQU 64 bytes 7
Free Blocks on Lookasides 10 Lookaside Space (bytes) 992
Lock Manager Dynamic Memory
Current Size (MB) 89.51 Current Size (Pages) 11458
Free Space (MB) 84.74 Hits 2816
Space in Use (MB) 4.76 Misses 0
Number of Empty Pages 11357 Expansions 11458
Number of Free Packets 292322 Packet Size (bytes) 0
S2 Nonpaged Dynamic Memory (Lists + Variable)
Current Size (MB) 7.96 Current Size (Pagelets) 16304
Initial Size (MB) 7.96 Initial Size (Pagelets) 16304
Maximum Size (MB) 11.96 Maximum Size (Pagelets) 24496
Free Space (MB) 7.74 Space in Use (MB) 0.21
Largest Var Block (MB) 7.74 Smallest Var Block (MB) 7.74
Number of Free Blocks 1 Free Blocks LEQU 256 byte 0
Free Blocks on Lookasides 0 Lookaside Space (bytes) 0
system_dirac_opa0 >--- Integrity test ---
Code: Select all
detommaso_kenobi >sho mem/pool/full
System Memory Resources on 2-MAR-2024 18:12:14.38
Nonpaged Dynamic Memory (Lists + Variable)
Current Size (MB) 250.00 Current Size (Pagelets) 512000
Initial Size (MB) 250.00 Initial Size (Pagelets) 512000
Maximum Size (MB) 706.00 Maximum Size (Pagelets) 1445888
Free Space (MB) 231.34 Space in Use (MB) 18.65
Largest Var Block (MB) 227.89 Smallest Var Block (MB) 227.89
Number of Free Blocks 4796 Free Blocks LEQU 64 bytes 0
Free Blocks on Lookasides 4795 Lookaside Space (MB) 3.45
Bus Addressable Memory (Lists + Variable)
Current Size (MB) 1.49 Current Size (Pagelets) 3056
Initial Size (MB) 1.49 Initial Size (Pagelets) 3056
Free Space (MB) 1.37 Space in Use (MB) 0.11
Largest Var Block (MB) 1.37 Smallest Var Block (bytes) 320
Number of Free Blocks 7 Free Blocks LEQU 64 bytes 0
Free Blocks on Lookasides 2 Lookaside Space (bytes) 192
Paged Dynamic Memory (Lists + Variable)
Current Size (MB) 16.89 Current Size (Pagelets) 34592
Free Space (MB) 6.31 Space in Use (MB) 10.57
Largest Var Block (MB) 6.20 Smallest Var Block (bytes) 16
Number of Free Blocks 1315 Free Blocks LEQU 64 bytes 373
Free Blocks on Lookasides 1312 Lookaside Space (KB) 112.89
Lock Manager Dynamic Memory
Current Size (MB) 83.23 Current Size (Pages) 10654
Free Space (MB) 71.80 Hits 35004544
Space in Use (MB) 11.42 Misses 0
Number of Empty Pages 9307 Expansions 10654
Number of Free Packets 260952 Packet Size (bytes) 0
detommaso_kenobi >mc sysgen sho npagedyn
Parameter Name Current Default Min. Max. Unit Dynamic
-------------- ------- ------- ------- ------- ---- -------
NPAGEDYN 262144000 4194304 163840 1879048192 Bytes
System Virtual Address Space Layout:
------------------------------------
Item Base End Length
Nonpaged Pool (initial size) FFFFFFFF.A01BE000 FFFFFFFF.AFBBE000->0FA00000<-- 250MB
Nonpaged Pool Expansion Area FFFFFFFF.AFBBE000 FFFFFFFF.CC3BE000 1C800000
Execlet Data Region FFFFFFFF.CD000000 FFFFFFFF.CF000000 02000000
Fork Buffers Secondary to Primary FFFFFFFF.D2368000 FFFFFFFF.D236A000 00002000
Erase Pattern Buffer Page FFFFFFFF.D009C000 FFFFFFFF.D009E000 00002000
Erase Pattern Page Table Page FFFFFFFF.D009E000 FFFFFFFF.D00A0000 00002000
1050 Balance Slots, 2 pages each FFFFFFFF.D00C8000 FFFFFFFF.D1130000 01068000
Paged Pool FFFFFFFF.D1130000 FFFFFFFF.D2214000 010E4000
System Control Block (SCB) FFFFFFFF.A033C040 FFFFFFFF.A033C040 00000000
Restart Parameter Block (HWRPB) FFFFFFFF.D2254000 FFFFFFFF.D22D6000 00082000
Window Page 1 FFFFFFFF.D23CA000 FFFFFFFF.D23CC000 00002000
Window Page 2 FFFFFFFF.D23CC000 FFFFFFFF.D23CE000 00002000
Swapper Process Kernel Stack FFFFFFFF.D23BA000 FFFFFFFF.D23C4000 0000A000
Swapper Map FFFFFFFF.D26C8000 FFFFFFFF.D274A000 00082000
Idle Loop's Mapping of Zero Pages FFFFFFFF.D23C4000 FFFFFFFF.D23C6000 00002000
PrimCPU Machine Check Logout Area 00000000.00000000 00000000.00000000 00000000
PrimCPU Sys Context Kernel Stack FFFFFFFF.D22E2000 FFFFFFFF.D22EC000 0000A000
Tape Mount Verification Buffer FFFFFFFF.D32EE000 FFFFFFFF.D32F2000 00004000--- Alpha tests ---
Code: Select all
system_shark >sho mem/pool/full
System Memory Resources on 2-MAR-2024 19:18:21.35
Nonpaged Dynamic Memory (Lists + Variable)
Current Size (MB) 30.00 Current Size (Pagelets) 61440
Initial Size (MB) 30.00 Initial Size (Pagelets) 61440
Maximum Size (MB) 152.00 Maximum Size (Pagelets) 311296
Free Space (MB) 28.39 Space in Use (MB) 1.60
Largest Var Block (MB) 28.24 Smallest Var Block (MB) 28.24
Number of Free Blocks 183 Free Blocks LEQU 64 bytes 0
Free Blocks on Lookasides 182 Lookaside Space (KB) 147.31
Bus Addressable Memory (Lists + Variable)
Current Size (KB) 128.00 Current Size (Pagelets) 256
Initial Size (KB) 128.00 Initial Size (Pagelets) 256
Free Space (KB) 110.87 Space in Use (KB) 17.12
Largest Var Block (KB) 104.00 Smallest Var Block (KB) 6.87
Number of Free Blocks 2 Free Blocks LEQU 64 bytes 0
Free Blocks on Lookasides 0 Lookaside Space (bytes) 0
Paged Dynamic Memory (Lists + Variable)
Current Size (MB) 14.68 Current Size (Pagelets) 30080
Free Space (MB) 2.61 Space in Use (MB) 12.06
Largest Var Block (MB) 2.61 Smallest Var Block (bytes) 16
Number of Free Blocks 26 Free Blocks LEQU 64 bytes 22
Free Blocks on Lookasides 2 Lookaside Space (bytes) 256
Lock Manager Dynamic Memory
Current Size (MB) 10.96 Current Size (Pages) 1404
Free Space (MB) 9.76 Hits 4096
Space in Use (MB) 1.20 Misses 0
Number of Empty Pages 1283 Expansions 1404
Number of Free Packets 35540 Packet Size (bytes) 0
system_shark >mc sysgen sho npagedyn
Parameter Name Current Default Min. Max. Unit Dynamic
-------------- ------- ------- ------- ------- ---- -------
NPAGEDYN 31457280 1048576 163840 1879048192 Bytes
System Virtual Address Space Layout:
------------------------------------
Item Base End Length
System Virtual Base Address FFFFFEFE.00000000
PFN Database FFFFFEFE.00000000 FFFFFEFE.00500000 00500000
543 WSL Slots, 33 pages each FFFFFEFE.00500000 FFFFFEFE.090FE000 08BFE000
Permanent Mapping of System L1PT FFFFFEFE.090FE000 FFFFFEFE.09100000 00002000
Error Log Buffers, S2 FFFFFEFE.09100000 FFFFFEFE.09104000 00004000
Global Page Table (GPT) FFFFFEFE.09104000 FFFFFEFE.091DD070 000D9070
Resource Hash Table FFFFFFFF.7FFB6000 FFFFFFFF.7FFF6000 00040000
Lock ID Table FFFFFFFF.760EE000 FFFFFFFF.76800000 00712000
Execlet Code Region FFFFFFFF.80000000 FFFFFFFF.80800000 00800000
S0S1 Resident Image Code Region FFFFFFFF.80800000 FFFFFFFF.83800000 03000000
S0S1 Resident Image Data Region FFFFFFFF.83C00000 FFFFFFFF.84400000 00800000
System Header FFFFFFFF.84400000 FFFFFFFF.84416000 00016000
Bus-Addressable Pool (BAP) FFFFFFFF.84416000 FFFFFFFF.84436000 00020000
Error Log Buffers, S0 FFFFFFFF.84436000 FFFFFFFF.8443A000 00004000
Nonpaged Pool (initial size) FFFFFFFF.8443A000 FFFFFFFF.8623A000->01E00000<-- 30MB
Nonpaged Pool Expansion Area FFFFFFFF.8623A000 FFFFFFFF.8DC3A000 07A00000
Execlet Data Region FFFFFFFF.83800000 FFFFFFFF.83C00000 00400000
Fork Buffers Secondary to Primary FFFFFFFF.8FCD8000 FFFFFFFF.8FCDA000 00002000