| Message ID | 20230207051105.11575-19-ricardo.neri-calderon@linux.intel.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere, archived |
| Headers | show |
| Series | sched: Introduce classes of tasks for load balance | expand |
diff --git a/include/linux/sched.h b/include/linux/sched.h index 10c6abdc3465..45f28a601b3d 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1535,7 +1535,17 @@ struct task_struct { * A hardware-defined classification of task that reflects but is * not identical to the number of instructions per cycle. */ - unsigned short ipcc; + unsigned int ipcc : 9; + /* + * A candidate classification that arch-specific implementations + * qualify for correctness. + */ + unsigned int ipcc_tmp : 9; + /* + * Counter to filter out transient candidate classifications + * of a task. + */ + unsigned int ipcc_cntr : 14; #endif /*
The unprocessed classification that hardware provides for a task may not be usable by the scheduler: the classification may change too frequently or architectures may want to consider extra factors. For instance, some processors with Intel Thread Director need to consider the state of the SMT siblings of a core. Provide per-task helper variables that architectures can use to post- process the classification that hardware provides. 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: * Used bit-fields to fit all the IPC class data in 4 bytes. (PeterZ) * Shortened names of the helpers. * Renamed helpers with the ipcc_ prefix. * Reworded commit message for clarity --- include/linux/sched.h | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)