Support early print buffer flushing in debug mode by zibaiwan · Pull Request #61 · intel/fpga-runtime-for-opencl (original) (raw)
Added a flow to flush printf() buffer before the Kernel ends. This will be helpful for debugging a hang Kernel. The Runtime periodically polls from the device and process the printf buffer from the last processed point. If ACL_HAL_DEBUG = 1 and the Kernel is Hang, Kernel status (existing feature) and printf buffer will be flushed to stdout every 10 seconds (approximately). The thread will run if there are spare cycles. If ACL_HAL_DEBUG = 3, Kernel status and printf buffer will flushed every 10 seconds, even the Kernel isn't hung. The behavior of printf() is not altered in non-debug mode.
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