RE: [PATCH] x86: Export tsc related information in sysfs

From: Dan Magenheimer
Date: Tue May 18 2010 - 15:33:47 EST

> From: H. Peter Anvin [mailto:hpa@xxxxxxxxx]
> Subject: Re: [PATCH] x86: Export tsc related information in sysfs
> On 05/18/2010 10:49 AM, Dan Magenheimer wrote:
> >
> > (Though I expect tglx/arjan/andi/mingo to disagree with this proposal
> > for similar reasons as the original one that started this thread...)
> I'll add another reason to disagree: exporting these as sysfs variables
> is non-atomic, but these are really only useful when atomically read as
> a unit.

Which "these"? The counters? I would think the primary use
of the counters is to diagnose extreme problem cases, not
to differentiate whether a system or process did exactly
27 vs 28 rdtsc's, so I don't see why atomic read is at all

Or did I miss your point entirely?
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at