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SubjectRe: Linux performance on 21066 (UDB)
On 7 Feb 1998, Danny ter Haar wrote:

> We have a 21164-533Mhz with ncr scsi-2 and a PII-338Mhz.
>
> a kernel compile : make dep bzImaze (vmlinux on alpha) modules modules_install
> takes about 7 minutes on the PII and 6 minutes on the alpha.
> While compiling the dec respons is more snappier then the intel.
> If we run rc564 these are the results:

Remember... compiling for an alpha will take necessarily longer than an
intel to compile things. Alpha must generate more code (RISC) vs. the
Intel compiles which are CISC.

> PII-338Mhz
> Completed block 668EA6E2:D0000000 (268435456 keys)
> 00:04:46.92 - [935572.81 keys/sec]
>
> AXP 533Mhz
> Completed block 64074520:50000000 (268435456 keys)
> 00:09:39.51 - [463205.64 keys/sec]
>
> I think this has to do with the way it's compiled ?

It has to do with the fact that alpha doesn't have a built-in roll
function, like the intel does. Go to www.distributed.net they JUST
released some killer hack that speeds up the alpha code 1.5-2.0 times the
old speed! I don't know WHAT they did, but it FLIES now!


-Sir Woody Hackswell balint@udayton.edu woody@woodynet.siscom.net
(The ArchFool) http://homepages.udayton.edu/~balintrc
------------------------------------------------------------------
...for all that I have is written in chicken.

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