Subject: Re: largepage success
To: Bill Sommerfeld <sommerfeld@orchard.arlington.ma.us>
From: Brian Gregor <bgregor@buphy.bu.edu>
List: port-i386
Date: 09/08/2000 16:38:31
cpu0: AMD K6-III (586-class)
cpu0: features 8021bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8>
cpu0: features 8021bf<PGE,MMX>
The two kernels are a little different in size:
-rwxr-xr-x 1 root wheel 2066789 Sep 7 16:02 /netbsd
-rwxr-xr-x 1 root wheel 2067333 Sep 7 17:57 /netbsd.4MB
so at least I know I wasn't comparing the exact same thing! :-)
Thanks,
brian
On Fri, 8 Sep 2000, Bill Sommerfeld wrote:
> What cpu feature flags are enabled on the K6/II? (these should now be
> printed as part of the boot messages).
>
> My K6 reports PSE, but not PGE (pte global extension), which means it
> will be doing a full TLB flush on every context switch, which will
> likely significantly reduce how much you win from mapping the kernel
> with a large page.
>
> - Bill
>