tmakin/ack-tegra
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

PM: EM: Use runtime modified EM for CPUs energy estimation in EAS

Browse Source 
The new Energy Model (EM) supports runtime modification of the performance
state table to better model the power used by the SoC. Use this new
feature to improve energy estimation and therefore task placement in
Energy Aware Scheduler (EAS).

Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Lukasz Luba
2024-02-08 11:55:43 +00:00
committed by Rafael J. Wysocki
parent ca0fc871f1
commit aa11a7ebfd
1 changed files with 9 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/linux/energy_model.h
+9 -3
View File
@@ -239,9 +239,14 @@ static inline unsigned long em_cpu_energy(struct em_perf_domain *pd,
unsigned long allowed_cpu_cap)
{
unsigned long freq, ref_freq, scale_cpu;
struct em_perf_table *em_table;
struct em_perf_state *ps;
int cpu, i;
#ifdef CONFIG_SCHED_DEBUG
WARN_ONCE(!rcu_read_lock_held(), "EM: rcu read lock needed\n");
#endif
if (!sum_util)
return 0;
@@ -264,9 +269,10 @@ static inline unsigned long em_cpu_energy(struct em_perf_domain *pd,
* Find the lowest performance state of the Energy Model above the
* requested frequency.
*/
i = em_pd_get_efficient_state(pd->table, pd->nr_perf_states, freq,
pd->flags);
ps = &pd->table[i];
em_table = rcu_dereference(pd->em_table);
i = em_pd_get_efficient_state(em_table->state, pd->nr_perf_states,
freq, pd->flags);
ps = &em_table->state[i];
/*
* The capacity of a CPU in the domain at the performance state (ps)