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    Subject[PATCH v3 05/24] sched/core: Update the IPC class of the current task
    Date
    When supported, hardware monitors the instruction stream to classify the
    current task. Hence, at userspace tick, we are ready to read the most
    recent classification result for the current task.

    Cc: Ben Segall <bsegall@google.com>
    Cc: Daniel Bristot de Oliveira <bristot@redhat.com>
    Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
    Cc: Ionela Voinescu <ionela.voinescu@arm.com>
    Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
    Cc: Len Brown <len.brown@intel.com>
    Cc: Lukasz Luba <lukasz.luba@arm.com>
    Cc: Mel Gorman <mgorman@suse.de>
    Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
    Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: Tim C. Chen <tim.c.chen@intel.com>
    Cc: Valentin Schneider <vschneid@redhat.com>
    Cc: x86@kernel.org
    Cc: linux-pm@vger.kernel.org
    Cc: linux-kernel@vger.kernel.org
    Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
    ---
    Changes since v2:
    * None

    Changes since v1:
    * Removed argument smt_siblings_idle from call to arch_ipcc_update().
    * Used the new IPCC interfaces names.
    ---
    kernel/sched/core.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/kernel/sched/core.c b/kernel/sched/core.c
    index 39d218a2f243..9f4e9cc16df8 100644
    --- a/kernel/sched/core.c
    +++ b/kernel/sched/core.c
    @@ -5567,6 +5567,9 @@ void scheduler_tick(bool user_tick)
    if (housekeeping_cpu(cpu, HK_TYPE_TICK))
    arch_scale_freq_tick();

    + if (sched_ipcc_enabled() && user_tick)
    + arch_update_ipcc(curr);
    +
    sched_clock_tick();

    rq_lock(rq, &rf);
    --
    2.25.1
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