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The Compress and Verify (CnV) feature check and ensures data integrity in the compression operation. The implementation of CnV keeps a record of the CnV errors that have occurred since the driver was loaded. Expose CnV error stats by providing the "cnv_errors" file under debugfs. This includes the number of errors detected up to now and the type of the last error. The error count is provided on a per Acceleration Engine basis and it is reset every time the driver is loaded. Signed-off-by: Lucas Segarra Fernandez <lucas.segarra.fernandez@intel.com> Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
83 lines
3 KiB
Text
83 lines
3 KiB
Text
What: /sys/kernel/debug/qat_<device>_<BDF>/fw_counters
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Date: November 2023
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KernelVersion: 6.6
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Contact: qat-linux@intel.com
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Description: (RO) Read returns the number of requests sent to the FW and the number of responses
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received from the FW for each Acceleration Engine
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Reported firmware counters::
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<N>: Number of requests sent from Acceleration Engine N to FW and responses
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Acceleration Engine N received from FW
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What: /sys/kernel/debug/qat_<device>_<BDF>/heartbeat/config
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Date: November 2023
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KernelVersion: 6.6
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Contact: qat-linux@intel.com
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Description: (RW) Read returns value of the Heartbeat update period.
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Write to the file changes this period value.
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This period should reflect planned polling interval of device
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health status. High frequency Heartbeat monitoring wastes CPU cycles
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but minimizes the customer’s system downtime. Also, if there are
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large service requests that take some time to complete, high frequency
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Heartbeat monitoring could result in false reports of unresponsiveness
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and in those cases, period needs to be increased.
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This parameter is effective only for c3xxx, c62x, dh895xcc devices.
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4xxx has this value internally fixed to 200ms.
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Default value is set to 500. Minimal allowed value is 200.
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All values are expressed in milliseconds.
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What: /sys/kernel/debug/qat_<device>_<BDF>/heartbeat/queries_failed
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Date: November 2023
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KernelVersion: 6.6
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Contact: qat-linux@intel.com
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Description: (RO) Read returns the number of times the device became unresponsive.
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Attribute returns value of the counter which is incremented when
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status query results negative.
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What: /sys/kernel/debug/qat_<device>_<BDF>/heartbeat/queries_sent
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Date: November 2023
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KernelVersion: 6.6
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Contact: qat-linux@intel.com
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Description: (RO) Read returns the number of times the control process checked
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if the device is responsive.
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Attribute returns value of the counter which is incremented on
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every status query.
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What: /sys/kernel/debug/qat_<device>_<BDF>/heartbeat/status
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Date: November 2023
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KernelVersion: 6.6
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Contact: qat-linux@intel.com
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Description: (RO) Read returns the device health status.
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Returns 0 when device is healthy or -1 when is unresponsive
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or the query failed to send.
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The driver does not monitor for Heartbeat. It is left for a user
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to poll the status periodically.
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What: /sys/kernel/debug/qat_<device>_<BDF>/pm_status
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Date: January 2024
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KernelVersion: 6.7
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Contact: qat-linux@intel.com
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Description: (RO) Read returns power management information specific to the
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QAT device.
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This attribute is only available for qat_4xxx devices.
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What: /sys/kernel/debug/qat_<device>_<BDF>/cnv_errors
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Date: January 2024
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KernelVersion: 6.7
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Contact: qat-linux@intel.com
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Description: (RO) Read returns, for each Acceleration Engine (AE), the number
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of errors and the type of the last error detected by the device
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when performing verified compression.
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Reported counters::
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<N>: Number of Compress and Verify (CnV) errors and type
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of the last CnV error detected by Acceleration
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Engine N.
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