I wasn't looking for the execution time on real machines, but rather to find an insight into the performance of the simulations. I know, emulating the TT or the Falcon is more complex than emulating the STE or Mega STE.
Miguel
Le 14 janv. 2023 à 18:47, Eero Tamminen <oak@xxxxxxxxxxxxxx> a écrit :
Hi Miguel,
On 8.1.2023 18.09, Eero Tamminen wrote:
On 8.1.2023 15.07, Miguel Saro wrote:
my topic today is execution speed. I optimized my latest program and did some testing. The tests are made without validating the exact cycle, with 24-bit addressing and with etos512. Before optimization, the result was obtained in 35 seconds on the Mega Ste emulation at 16 MHz and after optimization in 28 seconds (-20% not bad!).
Results
STE 68000 8 MHz: 56 s
Mega STE 68000 16 MHZ: 28 s
Mega STE 68000 32 MHZ: 14-15 s
TT 68020 32 MHz: 19 s
Falcon 68030 32 MHz: 31 s
I don't understand why Falcon at 32 MHz is slower than the Mega STE at 16 or 32 MHz. Does anyone have an explanation to this ? App is below.
What Hatari settings you are using?
Emulator with etos512kfr 4Mo
STE 8MHz Mega Ste 16,32 MHz TT 32 MHz Falcon 32 MHz
Have you e.g. enabled cycle-exact mode which is a requirement for any kind of measurements?
Oh no, see first sentences.
Are you using the same display mode, e.g. ST-high, for all the machines, so that they are comparable?
Exactly same display mode. VDI 800 x600 4 colors.
I did not see your program providing timing info so are you doing it manually e.g. with stopwatch?
Manually with the clock in seconds. By doing 5 the test. Error: approximately 1 second
(Wall-time measurements are affected also by things like emulation speed, e.g. your CPU being too slow emulate given setup at full speed, use of fast-forward etc. I.e. the may give pretty wrong results.)
One easy method for exact measurements (after emulation settings are OK), is enabling profiling and setting breakpoints on test start & end. Profile will then tell how long it took.
If our program includes symbols, profile also tells where the time went. Here's info on where it goes under ST emulation:
---------------------------------------
Used cycles:
12.61% 13.35% 13.35% 60267624 63795188 63795188 CAL4
10.92% 52205684 ROM_TOS
9.63% 46038972 su4
8.02% 15.75% 15.75% 38310236 75283024 75283024 TRSCx1
6.99% 33404872 voisin
6.36% 30384142 lne3
5.92% 28299068 su3
5.63% 21.64% 21.64% 26916600 103410608 103410608 CALC4
5.46% 26101852 jaqar
4.02% 6.87% 6.87% 19236752 32812924 32812924 TRSCex
---------------------------------------
Attached is callgraph of same.
Note that I did not use breakpoints, so above 1 min profile includes showing of the results at the end, and couple of seconds of idling in the UI.
11% of that minute going to ROM TOS sounds still something you might want to look into.
To try, unZIP then clic "search" without changing anything.
- Eero<profile.png>
M et Y Saro
Méaudre: 04 76 94 79 32
Seyssinet: 04 76 21 61 02
// locations. vercors. free. fr
// cocoa. pod. free. fr