# Monitor Suspend Power Management

The Suspend state is the deepest sleep state in the APSS with all user
space processes frozen and drivers releasing their resources. During the
Suspend state, all cores enter the C4 state followed by the AOSD Sleep
state.

A user space module can configure the Suspend state using the following
command:

`echo mem > /sys/power/autosleep`

## Verify suspend statistics

To check suspend statistics run the following commands:

cd /sys/power/suspend_stats
    cat success
    cat fail
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The success count indicates the number of times the APSS has
successfully entered the Suspend state while the fail count indicates
the number of times the APSS has failed to enter the Suspend state.

## Next steps

- [Efficient wake up latency with power QoS API](https://docs.qualcomm.com/doc/80-70030-30/topic/pmqos.html#pmqos)
- [Debug high sleep current](https://docs.qualcomm.com/doc/80-70030-30/topic/debug.html#powerdebug)

Last Published: Jun 22, 2026

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