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SimH throttle speeds versus actual PDP-11 systems?

T

tschak909

Experienced Member
Joined
Mar 26, 2018
Messages
121
Location
Denton, TX USA
Has somebody put together notes or a table on matching throttle speeds to approximate CPU speeds of DEC systems for SimH?

I know it's not exact, but am curious as to just how accurate we can get?

-Thom
 
simh on Xeon E5680 3.33 ГГц
Code: 
LSI 11 or PDP 11/03 Processor
56KB of memory
50 Hertz System Clock

No SYSGEN options enabled


.RUN SPEED0

Speed test (cache absent)

BR .+2                      64 031 600  оп./сек
...
R1(23456.)+R0(12345.)       ... ->  27 350 088  op/sec
.
KDJ11-B (24 MHz)
Code: 
Testing in progress - Please wait
Memory Size is 4088 K Bytes
9 Step memory test
  Step 1 2 3 4 5 6 7 8 9


Message 04      Entering Dialog mode

Commands are Help, Boot, List, Setup, Map and Test.
Type a command then press the RETURN key: MAP


23.996 MHz

Memory Map
Starting   Ending       Size in    CSR          CSR     Bus
Address    address      K Bytes    address      type    type

00000000 - 17757776     4088       17772102     Parity  PMI

Press the RETURN key when ready to continue

Commands are Help, Boot, List, Setup, Map and Test.
Type a command then press the RETURN key: BOO DU0


Trying DU0

Starting system from DU0


RT-11SB  V05.07

.R MSCPCK

.RUN HX7:SPEED4

Speed test (cache on)

...
R1(23456.)+R0(12345.)           ... ->   5 989 094 op./sec
 
Hunta said:
simh on Xeon E5680 3.33 ГГц
Code: 
LSI 11 or PDP 11/03 Processor
56KB of memory
50 Hertz System Clock

No SYSGEN options enabled


.RUN SPEED0

Speed test (cache absent)

BR .+2                      64 031 600  оп./сек
...
R1(23456.)+R0(12345.)       ... ->  27 350 088  op/sec
.
KDJ11-B (24 MHz)
Code: 
Testing in progress - Please wait
Memory Size is 4088 K Bytes
9 Step memory test
  Step 1 2 3 4 5 6 7 8 9


Message 04      Entering Dialog mode

Commands are Help, Boot, List, Setup, Map and Test.
Type a command then press the RETURN key: MAP


23.996 MHz

Memory Map
Starting   Ending       Size in    CSR          CSR     Bus
Address    address      K Bytes    address      type    type

00000000 - 17757776     4088       17772102     Parity  PMI

Press the RETURN key when ready to continue

Commands are Help, Boot, List, Setup, Map and Test.
Type a command then press the RETURN key: BOO DU0


Trying DU0

Starting system from DU0


RT-11SB  V05.07

.R MSCPCK

.RUN HX7:SPEED4

Speed test (cache on)

...
R1(23456.)+R0(12345.)           ... ->   5 989 094 op./sec
Click to expand...
would you be able to share these benchmarks or where they can be found?
 
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