diff options
| author |   Lina Iyer <ilina@codeaurora.org> | 2020-10-15 14:47:22 -0600 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-10-16 17:53:22 +0200 |
| commit | c6a113b52302adcfadda63af81dc05f7a669fbc8 (patch) | |
| tree | c696c33f38bfb7145162c2cc211e77467eefdd76 /drivers/base | |
| parent | PM: domains: Add curly braces to delimit comment + statement block (diff) | |
| download | linux-dev-c6a113b52302adcfadda63af81dc05f7a669fbc8.tar.xz linux-dev-c6a113b52302adcfadda63af81dc05f7a669fbc8.zip | |
PM: domains: enable domain idle state accounting
To enable better debug of PM domains, keep a track of successful
and failing attempts to enter each domain idle state.
This statistics are exported in debugfs when reading the
idle_states node associated with each PM domain.
Signed-off-by: Lina Iyer <ilina@codeaurora.org>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/power/domain.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index bc4243943940..859cdb207010 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -591,11 +591,14 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on, return -EBUSY; ret = _genpd_power_off(genpd, true); - if (ret) + if (ret) { + genpd->states[genpd->state_idx].rejected++; return ret; + } genpd->status = GENPD_STATE_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); @@ -3061,7 +3064,7 @@ 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; @@ -3073,7 +3076,8 @@ 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); |