Alan Cox <[EMAIL PROTECTED]> writes: > > > The MMX memcpy for CyrixIII and Athlon boxes is something like twice the > > > speed of rep movs. On most pentium II/III boxes the fast paths for rep movs > > > and for MMX are the same speed > > > > As long as you are copying in real memory. So the PCI bus or the host bridge > > implementation may be the actual limit. > > The CyrixIII sits on the same host bridges as the intel processors I don't know if it applies to this case but one thing I have seen make a noticeable difference is whether or not write-combining is enabled. If we have only be enabling MTRR's for intel this could do account for it. Eric - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
- Re: [Linux-fbdev-devel] Re: fbcon slowness [was NTP on ... James Simmons
- Re: [Linux-fbdev-devel] Re: fbcon slowness [was NT... Jamie Lokier
- [Linux-fbdev-devel] Re: fbcon slowness [was NTP on... James Simmons
- Re: [Linux-fbdev-devel] Re: fbcon slowness [wa... Alan Cox
- Re: [Linux-fbdev-devel] Re: fbcon slowness... Geert Uytterhoeven
- Re: [Linux-fbdev-devel] Re: fbcon slow... Alan Cox
- Re: [Linux-fbdev-devel] Re: fbcon... Eric W. Biederman
- Re: [Linux-fbdev-devel] Re: f... Jamie Lokier
- [Linux-fbdev-devel] Re: fbcon slowness [was NTP on... James Simmons
- Re: [Linux-fbdev-devel] Re: fbcon slowness [was NT... James Simmons
- Re: [Linux-fbdev-devel] Re: fbcon slowness [wa... Jamie Lokier
- Re: [Linux-fbdev-devel] Re: fbcon slowness [was NT... James Simmons
- Re: [Linux-fbdev-devel] Re: fbcon slowness [was NT... James Simmons
- Re: [Linux-fbdev-devel] Re: fbcon slowness [wa... Eric W. Biederman
- Re: [Linux-fbdev-devel] Re: fbcon slowness... Geert Uytterhoeven
- Re: [Linux-fbdev-devel] Re: fbcon slow... Maciej W. Rozycki
- Re: [Linux-fbdev-devel] Re: fbcon... Eric W. Biederman