pcie (PCIe Bandwidth)

The timeline information of PCIe bandwidth data is displayed at the PCIe layer in the msprof_*.json file, and the summary information is summarized in the pcie_*.csv file.

Applicable Products

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

Data at the PCIe Layer in msprof_*.json

The following figure shows data at the PCIe level in the msprof_*.json file.

Figure 1 PCIe layer

**Table 1** Field description
Field	Description
PCIe_cpl	Completion packet that receives write requests, in MB/s. Tx stands for the transmitter, whereas Rx stands for the receiver.
PCIe_nonpost	PCIe Non-Post data transmission bandwidth, in MB/s. Tx stands for the transmitter, whereas Rx stands for the receiver.
PCIe_nonpost_latency	Transmission latency in PCIe Non-Post mode, in μs. Tx stands for the transmitter, whereas Rx stands for the receiver. PCIe_nonpost_latency does not involve RX. The value is fixed at 0.
PCIe_post	PCIe Post data transmission bandwidth, in MB/s. Tx stands for the transmitter, whereas Rx stands for the receiver.

pcie_*.csv File

The file content is formatted as follows.

Figure 2 pcie_*.csv

**Table 2** Field description
Field	Description
Device_id	Device ID.
Mode	Mode. The options are as follows: Tx_p_avg(MB/s): PCIe Post data transmission bandwidth at the Tx side, in MB/s. Tx stands for the transmitter, whereas Rx stands for the receiver. Tx_np_avg(MB/s): PCIe Non-Post data transmission bandwidth at the Tx side, in MB/s. Tx_cpl_avg(MB/s): Completion packet that receives write requests at the Tx side, in MB/s. Tx_latency_avg(us): Transmission latency in PCIe Non-Post mode at the Tx side, in μs. Rx_p_avg(MB/s): PCIe Post data transmission bandwidth at the Rx side, in MB/s. Rx_np_avg(MB/s): PCIe Non-Post data transmission bandwidth at the Rx side, in MB/s. Rx_cpl_avg(MB/s): Completion packet that receives write requests at the Rx side, in MB/s.
Min, Max, Avg	Minimum value, maximum value, and mean value.

Parent topic: Profile Data File References