Click Here
home features news forums classifieds faqs links search
6071 members 
Amiga Q&A /  Free for All /  Emulation /  Gaming / (Latest Posts)
Login

Nickname

Password

Lost Password?

Don't have an account yet?
Register now!

Support Amigaworld.net
Your support is needed and is appreciated as Amigaworld.net is primarily dependent upon the support of its users.
Donate

Menu
Main sections
» Home
» Features
» News
» Forums
» Classifieds
» Links
» Downloads
Extras
» OS4 Zone
» IRC Network
» AmigaWorld Radio
» Newsfeed
» Top Members
» Amiga Dealers
Information
» About Us
» FAQs
» Advertise
» Polls
» Terms of Service
» Search

IRC Channel
Server: irc.amigaworld.net
Ports: 1024,5555, 6665-6669
SSL port: 6697
Channel: #Amigaworld
Channel Policy and Guidelines

Who's Online
15 crawler(s) on-line.
 108 guest(s) on-line.
 0 member(s) on-line.



You are an anonymous user.
Register Now!
 OlafS25:  8 mins ago
 edwardsjethro:  28 mins ago
 joeyunderwood:  30 mins ago
 Sikharubel:  33 mins ago
 Musashi5150:  55 mins ago
 MagicSN:  1 hr 23 mins ago
 Gunnar:  1 hr 30 mins ago
 pixie:  1 hr 42 mins ago
 kolla:  2 hrs 2 mins ago
 retrofaza:  2 hrs 4 mins ago

/  Forum Index
   /  Amiga Emulation
      /  emulated 68k speed vs. emulated ppc-speed
Register To Post

PosterThread
Zylesea 
emulated 68k speed vs. emulated ppc-speed
Posted on 20-Dec-2014 22:02:16
#1 ]
Elite Member
Joined: 16-Mar-2004
Posts: 2263
From: Ostwestfalen, FRG

As I lack a decent x64 or x86 hardware I cannot test it myself. Hence my question on the community: how fast is an emulated 68k processer and an emulated ppc processor on the very same hardware using WinUAE 3.0?

Maybe a test with lame for both processors would be a good benchmark.

lame 68k on OS 3.x.
lame ppc on OS 4.1 FE.

Or some comparable task. I guess 68k is faster, but how much faster is it actually?

_________________
My programs: via.bckrs.de
MorphOS user since V0.4 (2001)

 Status: Offline
Profile     Report this post  
pavlor 
Re: emulated 68k speed vs. emulated ppc-speed
Posted on 20-Dec-2014 22:30:04
#2 ]
Elite Member
Joined: 10-Jul-2005
Posts: 9578
From: Unknown

@Zylesea

Quote:
Maybe a test with lame for both processors would be a good benchmark.


PowerPC FPU is not properly emulated (sloooow), lame is highly FPU demanding benchmark.

In my experience 68k JIT and QEMU PowerPC deliver nearly the same performance on my hardware (Core i5 2500K 3.3 GHz).

eg. dnetc benchmark (note: versions aren´t the same, but results still should be comparable)

dnetc v2.9101-507-CTR-08102711 for AmigaOS (OS 3.9, 68K).
OGR-NG: [5,031,979 nodes/sec]
RC5-72: [4,801,249 keys/sec]

dnetc v2.9109-518-CTR-10121712 for AmigaOS (OS 4.1, PowerPC).
OGR-NG: [5,451,861 nodes/sec]
RC5-72: [3,693,154 keys/sec]

OGR-NG scales good with performance, so it is better for comparison.


Edit: MPlayer benchmark shows greater CPU performance than SAM460:
238.031s (MUI-MPlayer with WinUAE 2.9.0/3.0.0 beta 26)

In most cases, emulated CPU is in range of 500 to 1000 MHz G3 CPU on my hardware (except FPU of course).

I posted numerous benchmarks in WinUAE with Cyberstorm emulation thread.

Last edited by pavlor on 20-Dec-2014 at 10:39 PM.
Last edited by pavlor on 20-Dec-2014 at 10:38 PM.

 Status: Offline
Profile     Report this post  
itix 
Re: emulated 68k speed vs. emulated ppc-speed
Posted on 20-Dec-2014 23:45:12
#3 ]
Elite Member
Joined: 22-Dec-2004
Posts: 3398
From: Freedom world

@pavlor

Some cores perform better in emulation than other so results may change. But PPC emulation is surprisingly good.

_________________
Amiga Developer
Amiga 500, Efika, Mac Mini and PowerBook

 Status: Offline
Profile     Report this post  
Zylesea 
Re: emulated 68k speed vs. emulated ppc-speed
Posted on 21-Dec-2014 13:42:46
#4 ]
Elite Member
Joined: 16-Mar-2004
Posts: 2263
From: Ostwestfalen, FRG

Indeed it's quite good. Far better than I thought (which was that 68k emu was much faster than the ppc emulation). Pretty promising.

_________________
My programs: via.bckrs.de
MorphOS user since V0.4 (2001)

 Status: Offline
Profile     Report this post  
Hypex 
Re: emulated 68k speed vs. emulated ppc-speed
Posted on 22-Dec-2014 14:28:12
#5 ]
Elite Member
Joined: 6-May-2007
Posts: 11180
From: Greensborough, Australia

@itix

Quote:
But PPC emulation is surprisingly good.


I've pointed it out before but I expect perfomance would be good as PPC is a simple CPU to emulate in the instruction structure as each one is a long word and usually split into high word and low word. It's a simplified RISC design. So interpreting each code is simple enough, just emulating it is the next step. With enough CPU cycles anytihng is possible,

OTOH, 68K is CISC, and has its own complications there. But so is x86 and a lot of things can be remapped over with a bit of endian comnversion. As the UAE core emulation would demonstrate.

 Status: Offline
Profile     Report this post  

[ home ][ about us ][ privacy ] [ forums ][ classifieds ] [ links ][ news archive ] [ link to us ][ user account ]
Copyright (C) 2000 - 2019 Amigaworld.net.
Amigaworld.net was originally founded by David Doyle