Messages in this thread | | | From | Perry Harrington <> | Subject | Re: Using >1GB RAM | Date | Wed, 14 Jan 1998 20:21:05 -0800 (PST) |
| |
> > > May I ask if what I shall do with the 2GB 4 CPU machine? > > If I can live with 2GB user space and 2GB kernel space, is it > > worth modifying the kernel? Please give me a rough estimate > > of the workload. > > It shouldnt be that hard, and I'd like to see it done anyway. I don't have > 2Gigs to test it but I suspect Ingo or me can knock you up a test patch easily > > > I know that SunOS OpenServer can support up to 4GB memory though > > it is very expensive. How do they manage to do that? > > You have to start flushing the TLB every time you enter kernel mode and > need to touch a physical memory object as opposed to kernels own data/bss > space. It could be added to Linux but 4Gb boxes arent the norm and there > is a performance hit for a kernel built that way.
This screams PPro. Is there going to be a 64 bit version (like for the Alpha), for the PPro?
Curious thing, I took Intel's benchmarks and did some calculation. The PPro gets faster when you increase the Mhz; the performance per Mhz goes up. The P 2 gets slower ther faster it runs, performance per Mhz. My calculations suggest that a PPro running at the speed a P 2 (300Mhz) runs at, it would be faster than a P 2. This doesn't account for the fact that a PPro is a 64 bit processor, since their benchmarks are 32 bit only.
--Perry
> > Alan >
-- Perry Harrington Linux rules all OSes. APSoft () email: perry@apsoft.com Think Blue. /\
| |