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Date:   Fri, 14 Apr 2023 18:09:45 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     "Liang, Kan" <kan.liang@linux.intel.com>
Cc:     mingo@redhat.com, acme@kernel.org, linux-kernel@vger.kernel.org,
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        jolsa@kernel.org, namhyung@kernel.org, irogers@google.com,
        adrian.hunter@intel.com, ak@linux.intel.com, eranian@google.com
Subject: Re: [PATCH 2/6] perf: Support branch events logging
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On Fri, Apr 14, 2023 at 11:56:41AM -0400, Liang, Kan wrote:
> > If it were to only support 4, then
> > we're in counter scheduling contraint hell again 
> 
> Unfortunately, yes.
> 
> > and we need to somehow
> > group all these things together with the LBR event.
> 
> Group will bring many limits for the usage. For example, I was told
> there could be someone wants to use it with multiplexing.

You can create two groups, each with an LBR event, no?