l2_cache (L2 Cache Hit Ratio)

The L2 cache data does not contain the timeline information. The summary information is summarized in the l2_cache_*.csv file.

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	√
Atlas inference products	√
Atlas training products	√

The file content is formatted as follows.

Figure 1 l2_cache_*.csv

For the following products:

The Hit Rate and Victim Rate for the first operator in this file are not intended for reference.

For the following products:

Data of the first operator in the file is missing. This does not affect the overall performance analysis.

**Table 1** Field description
Field	Description
Device_id	Device ID.
Stream Id	ID of the stream where a task is located.
Task Id	Task ID.
Hit Rate	Ratio of the number of times that memory access requests hit L2 to the total number of memory access requests. For the Atlas 200I/500 A2 inference products, you are advised to use the L2 cache group of aic_metrics to collect hit rate data. In this collection mode, the hit rate data is displayed in the *op_summary_.csv file. For the Atlas A2 training products/Atlas A2 inference products, you are advised to use the L2 cache group of aic_metrics to collect hit rate data. In this collection mode, the hit rate data is displayed in the op_summary_.csv* file. For the Atlas A3 training products/Atlas A3 inference products, you are advised to use the L2 cache group of aic_metrics to collect hit rate data. In this collection mode, the hit rate data is displayed in the *op_summary_.csv** file.
Victim Rate	Ratio of the number of times that memory access requests are missed and data in the cache is swapped out to the total number of memory access requests. For the Atlas 200I/500 A2 inference products, the value of Victim Rate may be greater than 1. For the Atlas A2 training products/Atlas A2 inference products, the value of Victim Rate may be greater than 1. For the Atlas A3 training products/Atlas A3 inference products, the value of Victim Rate may be greater than 1.
Op Name	Operator name.

Parent topic: Profile Data File References