From: Ingo Molnar <mingo@xxxxxxx> Date: Mon, 8 Dec 2008 12:33:18 +0100 > Your whole statistical argument that group readout is a must-have for > precision is fundamentally flawed as well: counters _themselves_, as used > by most applications, by their nature, are a statistical sample to begin > with. There's way too many hardware events to track each of them > unintrusively - so this type of instrumentation is _all_ sampling based, > and fundamentally so. (with a few narrow exceptions such as single-event > interrupts for certain rare event types) There are a lot of people who are going to fundamentally disagree with this, myself included. A lot of things are being stated about what people do with this stuff, but I think there are people working longer in this area who quite possibly know a lot better. But they were blindsided by this new work instead of being consulted, which was pretty unnice. -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
