On-Chip Memory Stress Test

Function

Perform a stress test on the on-chip memory and output the diagnosis result.

**Table 1** Diagnostic items
Item	Diagnosis Duration (Atlas Inference Products)	Diagnosis Duration (Other Products)	Whether NPU Training or Inference Is Affected	Application Scenario
On-chip memory stress test	6–7 hours	< 1 hour	Yes	The stress test is performed before a training or inference job is rolled out, or an ECC on the NPU on-chip memory is detected during job execution.

The on-chip memory stress test and on-chip memory diagnosis apply to different scenarios. For details, see Table 1. Perform the on-chip memory stress test or on-chip memory diagnosis as required.
If you want to conduct the on-chip memory diagnosis, on-chip memory stress test, and on-chip memory high-risk address stress test at the same time, refer to One-Click On-Chip Memory Stress Test.

Parameters

Table 2 lists only test-specific parameters. For details about other common parameters, see Common Parameters.

**Table 2** Parameter description
Parameter	Description	Mandatory
[-i, --items]	Specifies the diagnosis check item. Currently, only hbm and chipMemory are supported. hbm and chipMemory cannot be specified at the same time. For the Atlas A2 training products and Atlas A2 inference productsAtlas A3 training products and Atlas A3 inference products, set the value to hbm. For the Atlas 300I Pro inference card, Atlas 300V video analysis card, Atlas 300V Pro video analysis card, and Atlas 300I Duo inference card, set the value to chipMemory.	Yes
[-st, --st, --stress-time]	Specifies the time required by the on-chip memory stress test. The value ranges from 60 to 604800, in seconds. This parameter must be used together with [-s, --stress] in the scenario where on-chip memory check items are included.	No

Example

Example of hbm test on the Atlas 800I A2 inference server with the test duration setting to 60s:

ascend-dmi -dg -i hbm -s -st 60 -q

[***@***]# ascend-dmi -dg -i hbm -s -st 60 -q
Stress test is being performed, please wait.
Summary:
    Arch: aarch64
    Mode: ******
    Time: 20250529-19:36:47
 
Hardware:
    hbm:
        PASS

Example of chipMemory test on the Atlas 300I Duo inference card with the test duration setting to 60s:

ascend-dmi -dg -i chipMemory -s -st 60 -q

[***@***]# ascend-dmi -dg -i chipMemory -s -st 60 -q
Stress test is being performed, please wait.
Summary:
    Arch: aarch64
    Mode: ******
    Time: 20250529-19:25:25
 
Hardware:
    chipMemory:
        PASS

Fault Check Items

**Table 3** Fault check items
Command Output	Description
PASS	The on-chip memory stress test is passed.
SKIP	The product or scenario does not support the on-chip memory stress test.
FAIL	The on-chip memory stress test fails, and a new multi-bit isolation page is added. You can perform the on-chip memory stress test after on-chip memory diagnosis. For details, see Figure 1. The software fails to be executed. Refer to On-Chip Memory Stress Test Fails Due to Insufficient Device Memory.

Figure 1 On-chip memory stress test and diagnosis

Parent topic: Stress Test