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CONFIG_DEBUG_BFIN_HWTRACE_EXPAND: Expand Trace Buffer greater than 16 entries

General informations

The Linux kernel configuration item CONFIG_DEBUG_BFIN_HWTRACE_EXPAND:

• prompt: Expand Trace Buffer greater than 16 entries
• type: bool
• depends on: CONFIG_DEBUG_BFIN_HWTRACE_ON
• defined in arch/blackfin/Kconfig.debug
• found in Linux kernels: 2.6.24–2.6.39, 3.0–3.9, 3.10-rc+HEAD

Help text

By selecting this option, every time the 16 hardware entries in the Blackfin's HW Trace buffer are full, the kernel will move them into a software buffer, for dumping when there is an issue. This has a great impact on performance, (an interrupt every 16 change of flows) and should normally be turned off, except in those nasty debugging sessions

Hardware

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