Re: [PATCH] i386 add Intel PEBS and BTS cpufeature bits and detection

Andi Kleen
2006-11-17T09:22:27Z

> The former
> stores from/to information into MSRs and is very small (4 branches).

P4 since Prescott has 16

> On recent processors LBR and BTS can be constrained by priv level.

Doesn't help for kernel debugging.

-Andi