ntb: Add more debugfs support for ntb_perf testing options (8407dd6c) · Commits · 戴 / test

The ntb_perf tool uses module parameters to control the characteristics of its test. Enable the changing of these options through debugfs, and eliminating the need to unload and reload the module to make changes and run additional tests. Add a new module parameter that forces the DMA channel selection onto the same node as the NTB device (default: true). - seg_order: Size of the NTB memory window; power of 2. - run_order: Size of the data buffer; power of 2. - use_dma: Use DMA or memcpy? Default: 0. - on_node: Only use DMA channel(s) on the NTB node. Default: true. Signed-off-by:

Gary R Hook <gary.hook@amd.com> Acked-by:

Dave Jiang <dave.jiang@intel.com> Signed-off-by:

Jon Mason <jdmason@kudzu.us>

drivers/ntb/test/ntb_perf.c

+28 −0

Original line number	Diff line number	Diff line
		@@ -737,6 +737,10 @@ static int perf_debugfs_setup(struct perf_ctx *perf)
		struct dentry *debugfs_node_dir;
		struct dentry *debugfs_run;
		struct dentry *debugfs_threads;
		struct dentry *debugfs_seg_order;
		struct dentry *debugfs_run_order;
		struct dentry *debugfs_use_dma;
		struct dentry *debugfs_on_node;

		if (!debugfs_initialized())
		return -ENODEV;
		@@ -764,6 +768,30 @@ static int perf_debugfs_setup(struct perf_ctx *perf)
		if (!debugfs_threads)
		return -ENODEV;

		debugfs_seg_order = debugfs_create_u32("seg_order", 0600,
		debugfs_node_dir,
		&seg_order);
		if (!debugfs_seg_order)
		return -ENODEV;

		debugfs_run_order = debugfs_create_u32("run_order", 0600,
		debugfs_node_dir,
		&run_order);
		if (!debugfs_run_order)
		return -ENODEV;

		debugfs_use_dma = debugfs_create_bool("use_dma", 0600,
		debugfs_node_dir,
		&use_dma);
		if (!debugfs_use_dma)
		return -ENODEV;

		debugfs_on_node = debugfs_create_bool("on_node", 0600,
		debugfs_node_dir,
		&on_node);
		if (!debugfs_on_node)
		return -ENODEV;

		return 0;
		}

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