Acc PMU (Accelerator Bandwidth and Concurrency Information)

The accelerator bandwidth and concurrency data does not contain summary information. The timeline information is displayed at the Acc PMU layer in the msprof_*.json file.

Applicable Products

Product	Supported
Ascend 950PR/Ascend 950DT	x
Atlas A3 training products/Atlas A3 inference products	√
Atlas A2 training products/Atlas A2 inference products	√
Atlas 200I/500 A2 inference products	√
Atlas inference products	x
Atlas training products	x

Data at the Acc PMU Layer in msprof_*.json

The following figure shows data at the Acc PMU layer in the msprof_*.json file.

Figure 1 Acc PMU layer

**Table 1** Field description
Field	Description
read_bandwidth	Read bandwidth of the DVPP and DSA accelerators.
read_ost	Concurrent read operations of the DVPP and DSA accelerators.
write_bandwidth	Write bandwidth of the DVPP and DSA accelerators.
write_ost	Concurrent write operations of the DVPP and DSA accelerators.

Parent topic: Profile Data File References