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authorFrode Isaksen <fisaksen@baylibre.com>2017-12-19 11:15:35 +0000
committerJan-Simon Moeller <jsmoeller@linuxfoundation.org>2018-02-07 11:47:29 +0000
commitc4a6287185179732dfc1e903c195ff90c19f1065 (patch)
treed35f5010dbd952e40f5c178322026445b55757c1 /meta-eas/recipes-kernel/linux/linux-renesas/0075-sched-debug-Add-energy-procfs-interface.patch
parent109dea1d5c5a38807b098b588584636ae636a302 (diff)
This layer provides Energy Aware Scheduling (EAS) patcheseel_5.1.0eel_5.0.3eel_5.0.2eel/5.1.0eel/5.0.3eel/5.0.25.1.05.0.35.0.2eel
For the moment only for Renesas R-Car Gen3 SoC's. Can be expanded for other SoC's by setting the machine feature biglittle and provide the relevant EAS patches. Bug-AGL: SPEC-813 Change-Id: I2b5e69c515c33e57be19b30466fe208d7b8ac1a5 Signed-off-by: Frode Isaksen <fisaksen@baylibre.com>
Diffstat (limited to 'meta-eas/recipes-kernel/linux/linux-renesas/0075-sched-debug-Add-energy-procfs-interface.patch')
-rw-r--r--meta-eas/recipes-kernel/linux/linux-renesas/0075-sched-debug-Add-energy-procfs-interface.patch161
1 files changed, 161 insertions, 0 deletions
diff --git a/meta-eas/recipes-kernel/linux/linux-renesas/0075-sched-debug-Add-energy-procfs-interface.patch b/meta-eas/recipes-kernel/linux/linux-renesas/0075-sched-debug-Add-energy-procfs-interface.patch
new file mode 100644
index 0000000..7073d2b
--- /dev/null
+++ b/meta-eas/recipes-kernel/linux/linux-renesas/0075-sched-debug-Add-energy-procfs-interface.patch
@@ -0,0 +1,161 @@
+From 066fa940b25dc58b6618b785d82c90cbaa9b54d5 Mon Sep 17 00:00:00 2001
+From: Dietmar Eggemann <dietmar.eggemann@arm.com>
+Date: Fri, 14 Nov 2014 16:25:50 +0000
+Subject: [PATCH 75/92] sched/debug: Add energy procfs interface
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This patch makes the energy data available via procfs. The related files
+are placed as sub-directory named 'energy' inside the
+/proc/sys/kernel/sched_domain/cpuX/domainY/groupZ directory for those
+cpu/domain/group tuples which have energy information.
+
+The following example depicts the contents of
+/proc/sys/kernel/sched_domain/cpu0/domain0/group[01] for a system which
+has energy information attached to domain level 0.
+
+├── cpu0
+│ ├── domain0
+│ │ ├── busy_factor
+│ │ ├── busy_idx
+│ │ ├── cache_nice_tries
+│ │ ├── flags
+│ │ ├── forkexec_idx
+│ │ ├── group0
+│ │ │ └── energy
+│ │ │ ├── cap_states
+│ │ │ ├── idle_states
+│ │ │ ├── nr_cap_states
+│ │ │ └── nr_idle_states
+│ │ ├── group1
+│ │ │ └── energy
+│ │ │ ├── cap_states
+│ │ │ ├── idle_states
+│ │ │ ├── nr_cap_states
+│ │ │ └── nr_idle_states
+│ │ ├── idle_idx
+│ │ ├── imbalance_pct
+│ │ ├── max_interval
+│ │ ├── max_newidle_lb_cost
+│ │ ├── min_interval
+│ │ ├── name
+│ │ ├── newidle_idx
+│ │ └── wake_idx
+│ └── domain1
+│ ├── busy_factor
+│ ├── busy_idx
+│ ├── cache_nice_tries
+│ ├── flags
+│ ├── forkexec_idx
+│ ├── idle_idx
+│ ├── imbalance_pct
+│ ├── max_interval
+│ ├── max_newidle_lb_cost
+│ ├── min_interval
+│ ├── name
+│ ├── newidle_idx
+│ └── wake_idx
+
+The files 'nr_idle_states' and 'nr_cap_states' contain a scalar value
+whereas 'idle_states' and 'cap_states' contain a vector of power
+consumption at this idle state respectively (compute capacity, power
+consumption) at this capacity state.
+
+Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
+(cherry picked from commit 6bc112e3c581d16e3ebb7eb7abd396b7a2048169)
+Signed-off-by: Gaku Inami <gaku.inami.xw@bp.renesas.com>
+---
+ kernel/sched/debug.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++--
+ 1 file changed, 65 insertions(+), 2 deletions(-)
+
+diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
+index fa178b6..48a621c 100644
+--- a/kernel/sched/debug.c
++++ b/kernel/sched/debug.c
+@@ -261,9 +261,60 @@ static void sd_free_ctl_entry(struct ctl_table **tablep)
+ }
+
+ static struct ctl_table *
++sd_alloc_ctl_energy_table(struct sched_group_energy *sge)
++{
++ struct ctl_table *table = sd_alloc_ctl_entry(5);
++
++ if (table == NULL)
++ return NULL;
++
++ set_table_entry(&table[0], "nr_idle_states", &sge->nr_idle_states,
++ sizeof(int), 0644, proc_dointvec_minmax, false);
++ set_table_entry(&table[1], "idle_states", &sge->idle_states[0].power,
++ sge->nr_idle_states*sizeof(struct idle_state), 0644,
++ proc_doulongvec_minmax, false);
++ set_table_entry(&table[2], "nr_cap_states", &sge->nr_cap_states,
++ sizeof(int), 0644, proc_dointvec_minmax, false);
++ set_table_entry(&table[3], "cap_states", &sge->cap_states[0].cap,
++ sge->nr_cap_states*sizeof(struct capacity_state), 0644,
++ proc_doulongvec_minmax, false);
++
++ return table;
++}
++
++static struct ctl_table *
++sd_alloc_ctl_group_table(struct sched_group *sg)
++{
++ struct ctl_table *table = sd_alloc_ctl_entry(2);
++
++ if (table == NULL)
++ return NULL;
++
++ table->procname = kstrdup("energy", GFP_KERNEL);
++ table->mode = 0555;
++ table->child = sd_alloc_ctl_energy_table((struct sched_group_energy *)sg->sge);
++
++ return table;
++}
++
++static struct ctl_table *
+ sd_alloc_ctl_domain_table(struct sched_domain *sd)
+ {
+- struct ctl_table *table = sd_alloc_ctl_entry(14);
++ struct ctl_table *table;
++ unsigned int nr_entries = 14;
++
++ int i = 0;
++ struct sched_group *sg = sd->groups;
++
++ if (sg->sge) {
++ int nr_sgs = 0;
++
++ do {} while (nr_sgs++, sg = sg->next, sg != sd->groups);
++
++ nr_entries += nr_sgs;
++ }
++
++ table = sd_alloc_ctl_entry(nr_entries);
+
+ if (table == NULL)
+ return NULL;
+@@ -296,7 +347,19 @@ static void sd_free_ctl_entry(struct ctl_table **tablep)
+ sizeof(long), 0644, proc_doulongvec_minmax, false);
+ set_table_entry(&table[12], "name", sd->name,
+ CORENAME_MAX_SIZE, 0444, proc_dostring, false);
+- /* &table[13] is terminator */
++ sg = sd->groups;
++ if (sg->sge) {
++ char buf[32];
++ struct ctl_table *entry = &table[13];
++
++ do {
++ snprintf(buf, 32, "group%d", i);
++ entry->procname = kstrdup(buf, GFP_KERNEL);
++ entry->mode = 0555;
++ entry->child = sd_alloc_ctl_group_table(sg);
++ } while (entry++, i++, sg = sg->next, sg != sd->groups);
++ }
++ /* &table[nr_entries-1] is terminator */
+
+ return table;
+ }
+--
+1.9.1
+