libttk_error_manager_cleaner.so

Overview

Clears CANN ErrorManager residual errors to prevent cross-testcase error contamination.

TTK uses a forkserver multiprocessing model where a single worker process executes multiple testcases sequentially. The CANN ErrorManager runs in PROCESS_MODE, sharing an error container across all testcases. If a previous testcase fails and leaves errors uncleaned, the subsequent testcase's tiling phase may read stale errors and incorrectly report failure.

This module calls GetErrMgrRawErrorMessages() before each testcase to read and clear any residual errors.

Exported API

int ClearErrorManager(void);

Used by Python via ttk.core_modules.npu.error_cleaner.clear_error_manager(), wired into compilation_process and profile_process entry points.

Build

# Standalone
cmake -S csrc/error_manager_cleaner -B csrc/error_manager_cleaner/build
cmake --build csrc/error_manager_cleaner/build

# Top-level (whl packaging)
cmake -S csrc -B csrc/build
cmake --build csrc/build

Dependencies

Dependency	Type	Source
error_manager	Link	CANN ($ASCEND_HOME/lib64)
base/err_mgr.h	Header	CANN ($ASCEND_HOME/{arch}-linux/pkg_inc/)