[MODERATED] Re: [PATCH v3 5/6] PERFv3

Andrew Cooper <[email protected]> Fri, 8 Feb 2019 00:54:32 +0000

Newsgroups	org.kernel.lore.historical-speck
Message-ID	<[email protected]>

On 07/02/2019 23:41, speck for Andi Kleen wrote:
> From: Andi Kleen <[email protected]>
> Subject:  perf stat: Don't count EL for --transaction with three
>  counters
>
> When the system only has three counters HLE (EL) is also not
> available. Detect that there are only three counters and
> then automatically disable el-starts for --transaction.
> This avoids event multiplexing in this situation with no loss
> of information.

What about the non-HT case, where 7 counters are available?

~Andrew