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Date:   Wed, 4 Sep 2019 15:13:09 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Radim =?utf-8?B?S3LEjW3DocWZ?= <rkrcmar@redhat.com>
Cc:     linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Borislav Petkov <bp@alien8.de>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Andy Lutomirski <luto@kernel.org>,
        Jirka =?iso-8859-1?Q?Hladk=FD?= <jhladky@redhat.com>,
        =?utf-8?B?SmnFmcOtIFZvesOhcg==?= <jvozar@redhat.com>,
        x86@kernel.org
Subject: Re: [PATCH 2/2] sched/debug: add sched_update_nr_running tracepoint
Message-ID: <20190904131309.GS2332@hirez.programming.kicks-ass.net>
References: <20190903154340.860299-1-rkrcmar@redhat.com>
 <20190903154340.860299-3-rkrcmar@redhat.com>
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On Tue, Sep 03, 2019 at 05:43:40PM +0200, Radim Krčmář wrote:

> Red Hat adapted one of them for the tracepoint framework and created a
> tool to plot a heatmap of nr_running, where the sched_update_nr_running
> tracepoint is being used for fine grained monitoring of scheduling
> imbalance.

You should be able to reconstruct this from wakeup and switch
tracepoints.