From: Lina Iyer <ilina@codeaurora.org>
To: rjw@rjwysocki.net, ulf.hansson@linaro.org, linux-pm@vger.kernel.org
Cc: linux-arm-msm@vger.kernel.org, Lina Iyer <ilina@codeaurora.org>
Subject: [PATCH v3] PM / Domains: enable domain idle state accounting
Date: Thu, 15 Oct 2020 14:47:22 -0600 [thread overview]
Message-ID: <20201015204722.18764-1-ilina@codeaurora.org> (raw)
To enable better debug of PM domains, let's keep a track of the success
and rejections in entering each domain idle state.
This statistics is exported in debugfs when reading the idle_states
node, associated with each PM domain.
Signed-off-by: Lina Iyer <ilina@codeaurora.org>
---
Changes in v3:
- Rebased on top of mainline
---
drivers/base/power/domain.c | 10 +++++++---
include/linux/pm_domain.h | 2 ++
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 2cb5e04cf86c..20ecc1a7113c 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -559,12 +559,15 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on,
* happen very often).
*/
ret = _genpd_power_off(genpd, true);
- if (ret)
+ if (ret) {
+ genpd->states[genpd->state_idx].rejected++;
return ret;
+ }
}
genpd->status = GPD_STATE_POWER_OFF;
genpd_update_accounting(genpd);
+ genpd->states[genpd->state_idx].usage++;
list_for_each_entry(link, &genpd->child_links, child_node) {
genpd_sd_counter_dec(link->parent);
@@ -2932,7 +2935,7 @@ static int idle_states_show(struct seq_file *s, void *data)
if (ret)
return -ERESTARTSYS;
- seq_puts(s, "State Time Spent(ms)\n");
+ seq_puts(s, "State Time Spent(ms) Usage Rejected\n");
for (i = 0; i < genpd->state_count; i++) {
ktime_t delta = 0;
@@ -2944,7 +2947,8 @@ static int idle_states_show(struct seq_file *s, void *data)
msecs = ktime_to_ms(
ktime_add(genpd->states[i].idle_time, delta));
- seq_printf(s, "S%-13i %lld\n", i, msecs);
+ seq_printf(s, "S%-13i %-14lld %-14llu %llu\n", i, msecs,
+ genpd->states[i].usage, genpd->states[i].rejected);
}
genpd_unlock(genpd);
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index ee11502a575b..1d9a8de6b7ac 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -82,6 +82,8 @@ struct genpd_power_state {
s64 power_off_latency_ns;
s64 power_on_latency_ns;
s64 residency_ns;
+ u64 usage;
+ u64 rejected;
struct fwnode_handle *fwnode;
ktime_t idle_time;
void *data;
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
next reply other threads:[~2020-10-15 20:47 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-15 20:47 Lina Iyer [this message]
2020-10-16 15:55 ` [PATCH v3] PM / Domains: enable domain idle state accounting Rafael J. Wysocki
2020-10-16 16:07 ` Lina Iyer
2020-10-16 16:13 ` Rafael J. Wysocki
2020-10-16 16:21 ` Lina Iyer
2020-10-16 16:32 ` Rafael J. Wysocki
2020-10-16 16:43 ` Lina Iyer
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