[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20240830130309.2141697-3-vincent.guittot@linaro.org>
Date: Fri, 30 Aug 2024 15:03:06 +0200
From: Vincent Guittot <vincent.guittot@...aro.org>
To: mingo@...hat.com,
peterz@...radead.org,
juri.lelli@...hat.com,
dietmar.eggemann@....com,
rostedt@...dmis.org,
bsegall@...gle.com,
mgorman@...e.de,
vschneid@...hat.com,
lukasz.luba@....com,
rafael.j.wysocki@...el.com,
linux-kernel@...r.kernel.org
Cc: qyousef@...alina.io,
hongyan.xia2@....com,
Vincent Guittot <vincent.guittot@...aro.org>
Subject: [PATCH 2/5] energy model: Add a get previous state function
Instead of parsing all EM table everytime, add a function to get the
previous state.
Will be used in the scheduler feec() function.
Signed-off-by: Vincent Guittot <vincent.guittot@...aro.org>
---
include/linux/energy_model.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/include/linux/energy_model.h b/include/linux/energy_model.h
index 1ff52020cf75..ea8ea7e031c0 100644
--- a/include/linux/energy_model.h
+++ b/include/linux/energy_model.h
@@ -207,6 +207,24 @@ em_pd_get_efficient_state(struct em_perf_state *table, int nr_perf_states,
return nr_perf_states - 1;
}
+static inline int
+em_pd_get_previous_state(struct em_perf_state *table, int nr_perf_states,
+ int idx, unsigned long pd_flags)
+{
+ struct em_perf_state *ps;
+ int i;
+
+ for (i = idx - 1; i >= 0; i--) {
+ ps = &table[i];
+ if (pd_flags & EM_PERF_DOMAIN_SKIP_INEFFICIENCIES &&
+ ps->flags & EM_PERF_STATE_INEFFICIENT)
+ continue;
+ return i;
+ }
+
+ return -1;
+}
+
/**
* em_cpu_energy() - Estimates the energy consumed by the CPUs of a
* performance domain
--
2.34.1
Powered by blists - more mailing lists