| Message ID | 20220114031337.24741-1-benl@squareup.com (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
| Series | drivers: thermal: tsens: respect thermal_device_mode in threshold irq reporting | expand |
On Thu 13 Jan 19:13 PST 2022, Benjamin Li wrote: > 'echo disabled > .../thermal_zoneX/mode' will disable the thermal core's > polling mechanism to check for threshold trips. However, tsens supports > an interrupt mechanism to receive notification of trips, implemented in > commit 634e11d5b450 ("drivers: thermal: tsens: Add interrupt support"). > This is used sometimes to run performance test cases. > > Currently the thermal zone mode that's set by userspace is not checked > before propagating threshold trip events from IRQs. Let's fix this to > restore the abilty to disable thermal throttling at runtime. > > ==================== > > Tested on MSM8939 running 5.16.0. This platform has 8 cores; the first > four thermal zones control cpu0-3 and the last zone is for the other four > CPUs together. > > for f in /sys/class/thermal/thermal_zone*; do > echo "disabled" > $f/mode > echo $f | paste - $f/type $f/mode > done > > /sys/class/thermal/thermal_zone0 cpu0-thermal disabled > /sys/class/thermal/thermal_zone1 cpu1-thermal disabled > /sys/class/thermal/thermal_zone2 cpu2-thermal disabled > /sys/class/thermal/thermal_zone3 cpu3-thermal disabled > /sys/class/thermal/thermal_zone4 cpu4567-thermal disabled > > With mitigation thresholds at 75 degC and load running, we can now cruise > past temp=75000 without CPU throttling kicking in. > > watch -n 1 "grep '' /sys/class/thermal/*/temp > /sys/class/thermal/*/cur_state > /sys/bus/cpu/devices/cpu*/cpufreq/cpuinfo_cur_freq" > > /sys/class/thermal/thermal_zone0/temp:82000 > /sys/class/thermal/thermal_zone1/temp:84000 > /sys/class/thermal/thermal_zone2/temp:87000 > /sys/class/thermal/thermal_zone3/temp:84000 > /sys/class/thermal/thermal_zone4/temp:84000 > /sys/class/thermal/cooling_device0/cur_state:0 > /sys/class/thermal/cooling_device1/cur_state:0 > /sys/bus/cpu/devices/cpu0/cpufreq/cpuinfo_cur_freq:1113600 > /sys/bus/cpu/devices/cpu1/cpufreq/cpuinfo_cur_freq:1113600 > /sys/bus/cpu/devices/cpu2/cpufreq/cpuinfo_cur_freq:1113600 > /sys/bus/cpu/devices/cpu3/cpufreq/cpuinfo_cur_freq:1113600 > /sys/bus/cpu/devices/cpu4/cpufreq/cpuinfo_cur_freq:800000 > /sys/bus/cpu/devices/cpu5/cpufreq/cpuinfo_cur_freq:800000 > /sys/bus/cpu/devices/cpu6/cpufreq/cpuinfo_cur_freq:800000 > /sys/bus/cpu/devices/cpu7/cpufreq/cpuinfo_cur_freq:800000 > > Reported-by: Zac Crosby <zac@squareup.com> > Signed-off-by: Benjamin Li <benl@squareup.com> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Regards, Bjorn > --- > drivers/thermal/qcom/tsens.c | 15 +++++++++------ > 1 file changed, 9 insertions(+), 6 deletions(-) > > diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c > index 99a8d9f3e03c..0b6299512e7c 100644 > --- a/drivers/thermal/qcom/tsens.c > +++ b/drivers/thermal/qcom/tsens.c > @@ -509,13 +509,16 @@ static irqreturn_t tsens_irq_thread(int irq, void *data) > spin_unlock_irqrestore(&priv->ul_lock, flags); > > if (trigger) { > - dev_dbg(priv->dev, "[%u] %s: TZ update trigger (%d mC)\n", > - hw_id, __func__, temp); > - thermal_zone_device_update(s->tzd, > - THERMAL_EVENT_UNSPECIFIED); > + if (s->tzd->mode == THERMAL_DEVICE_ENABLED) { > + dev_dbg(priv->dev, "[%u] %s: TZ update trigger (%d mC)\n", > + hw_id, __func__, temp); > + thermal_zone_device_update(s->tzd, THERMAL_EVENT_UNSPECIFIED); > + } else { > + dev_dbg(priv->dev, "[%u] %s: TZ update trigger (%d mC) skipped as zone disabled\n", > + hw_id, __func__, temp); > + } > } else { > - dev_dbg(priv->dev, "[%u] %s: no violation: %d\n", > - hw_id, __func__, temp); > + dev_dbg(priv->dev, "[%u] %s: no violation: %d\n", hw_id, __func__, temp); > } > > if (tsens_version(priv) < VER_0_1) { > -- > 2.17.1 >
diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c index 99a8d9f3e03c..0b6299512e7c 100644 --- a/drivers/thermal/qcom/tsens.c +++ b/drivers/thermal/qcom/tsens.c @@ -509,13 +509,16 @@ static irqreturn_t tsens_irq_thread(int irq, void *data) spin_unlock_irqrestore(&priv->ul_lock, flags); if (trigger) { - dev_dbg(priv->dev, "[%u] %s: TZ update trigger (%d mC)\n", - hw_id, __func__, temp); - thermal_zone_device_update(s->tzd, - THERMAL_EVENT_UNSPECIFIED); + if (s->tzd->mode == THERMAL_DEVICE_ENABLED) { + dev_dbg(priv->dev, "[%u] %s: TZ update trigger (%d mC)\n", + hw_id, __func__, temp); + thermal_zone_device_update(s->tzd, THERMAL_EVENT_UNSPECIFIED); + } else { + dev_dbg(priv->dev, "[%u] %s: TZ update trigger (%d mC) skipped as zone disabled\n", + hw_id, __func__, temp); + } } else { - dev_dbg(priv->dev, "[%u] %s: no violation: %d\n", - hw_id, __func__, temp); + dev_dbg(priv->dev, "[%u] %s: no violation: %d\n", hw_id, __func__, temp); } if (tsens_version(priv) < VER_0_1) {
'echo disabled > .../thermal_zoneX/mode' will disable the thermal core's polling mechanism to check for threshold trips. However, tsens supports an interrupt mechanism to receive notification of trips, implemented in commit 634e11d5b450 ("drivers: thermal: tsens: Add interrupt support"). This is used sometimes to run performance test cases. Currently the thermal zone mode that's set by userspace is not checked before propagating threshold trip events from IRQs. Let's fix this to restore the abilty to disable thermal throttling at runtime. ==================== Tested on MSM8939 running 5.16.0. This platform has 8 cores; the first four thermal zones control cpu0-3 and the last zone is for the other four CPUs together. for f in /sys/class/thermal/thermal_zone*; do echo "disabled" > $f/mode echo $f | paste - $f/type $f/mode done /sys/class/thermal/thermal_zone0 cpu0-thermal disabled /sys/class/thermal/thermal_zone1 cpu1-thermal disabled /sys/class/thermal/thermal_zone2 cpu2-thermal disabled /sys/class/thermal/thermal_zone3 cpu3-thermal disabled /sys/class/thermal/thermal_zone4 cpu4567-thermal disabled With mitigation thresholds at 75 degC and load running, we can now cruise past temp=75000 without CPU throttling kicking in. watch -n 1 "grep '' /sys/class/thermal/*/temp /sys/class/thermal/*/cur_state /sys/bus/cpu/devices/cpu*/cpufreq/cpuinfo_cur_freq" /sys/class/thermal/thermal_zone0/temp:82000 /sys/class/thermal/thermal_zone1/temp:84000 /sys/class/thermal/thermal_zone2/temp:87000 /sys/class/thermal/thermal_zone3/temp:84000 /sys/class/thermal/thermal_zone4/temp:84000 /sys/class/thermal/cooling_device0/cur_state:0 /sys/class/thermal/cooling_device1/cur_state:0 /sys/bus/cpu/devices/cpu0/cpufreq/cpuinfo_cur_freq:1113600 /sys/bus/cpu/devices/cpu1/cpufreq/cpuinfo_cur_freq:1113600 /sys/bus/cpu/devices/cpu2/cpufreq/cpuinfo_cur_freq:1113600 /sys/bus/cpu/devices/cpu3/cpufreq/cpuinfo_cur_freq:1113600 /sys/bus/cpu/devices/cpu4/cpufreq/cpuinfo_cur_freq:800000 /sys/bus/cpu/devices/cpu5/cpufreq/cpuinfo_cur_freq:800000 /sys/bus/cpu/devices/cpu6/cpufreq/cpuinfo_cur_freq:800000 /sys/bus/cpu/devices/cpu7/cpufreq/cpuinfo_cur_freq:800000 Reported-by: Zac Crosby <zac@squareup.com> Signed-off-by: Benjamin Li <benl@squareup.com> --- drivers/thermal/qcom/tsens.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-)