---
title: GET_PERFORMANCE
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/ioscsimultimediacommandsdevice/1576198-get_performance
---

# GET_PERFORMANCE

## Declaration

```occ
virtual bool GET_PERFORMANCE(SCSITaskIdentifier request, IOMemoryDescriptor *dataBuffer, SCSICmdField2Bit TOLERANCE, SCSICmdField1Bit WRITE, SCSICmdField2Bit EXCEPT, SCSICmdField4Byte STARTING_LBA, SCSICmdField2Byte MAXIMUM_NUMBER_OF_DESCRIPTORS, SCSICmdField1Byte CONTROL);
```