On Wed, Dec 17, 2008 at 11:38 PM, Corey Osgood <[email protected]>wrote:
> On Wed, Dec 17, 2008 at 11:04 PM, Corey Osgood <[email protected]>wrote: > >> On Wed, Dec 17, 2008 at 8:55 PM, Peter Stuge <[email protected]> wrote: >> >>> Corey Osgood wrote: >>> > would there be any problem with calling functions to enable mtrrs >>> > and the cache (if it's not already) from the end of disable_car()? >>> >>> None whatsoever. Commit at will. >> >> >> It didn't help, disable_car() already does essentially the same thing; >> disable cache, enable mtrrs, re-enable cache. I'm comparing memtest between >> the stock bios and coreboot right now, the throughput for the stock bios is >> 6122MB/s for L1 cache and 574MB/s for memory. With v2, it's 3265 and 191, >> respectively (using ROMCC), with v3 it's 15 and 18. So something's not right >> somewhere. The other thing is that in v2 and v3, the CPU is only running at >> 800MHz in memtest, but with the stock BIOS it runs at 1.5GHz, that's >> probably the reason for the differing cache throughputs. Anyways, I'm diving >> into both v2 and v3 and trying to track down why this is running so slowly. >> > > <insert happy dance here> > > From the currently-running memtest86 on coreboot-v3: > L1 Cache: 128K 3265 MB/s > Memory : 480M 240 MB/s Congratulations! > > That's right, faster then v2 :) I've managed to coerce the northbridge into > running the memory at 200MHz (DDR400) without locking up the system like it > does in v2, and also to use 1GB of ram, which the fuctory BIOS only sees as > 512MB, and v2 for some reason trips over. However, it's a mixed blessing, > even though memtest86 now runs at an acceptable speed, coreboot is still > running fairly slowly. I'm attaching a patch that brings over mtrr.c from v2 > and hacks it to work with v3, but no sign-off because IMO it's not ready to > be committed. I'll try booting a FILO payload and a kernel tomorrow, but > right now it's time for some sleep. > I know it takes a while to try new things, but have you tried a different debug level. Switching Serengeti from BIOS_SPEW to BIOS_INFO cuts boot time by about 10x. I'm interested if that's true for you too. Thanks, Myles
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