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Commit 7b1a7014 authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Paul Mackerras
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[POWERPC] spufs: add a phys-id attribute to each SPU context 



For performance analysis, it is often interesting to know
which physical SPE a thread is currently running on, and,
more importantly, if it is running at all.

This patch adds a simple attribute to each SPU directory
with that information.
The attribute is read-only and called 'phys-id'. It contains
an ascii string with the number of the physical SPU (e.g.
"0x5"), or alternatively the string "0xffffffff" (32 bit -1)
when it is not running at all at the time that the file
is read.

Signed-off-by: default avatarArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 724bd80e

arch/powerpc/platforms/cell/spufs/file.c

+17 −0
Original line number Diff line number Diff line
@@ -1328,6 +1328,22 @@ static u64 spufs_srr0_get(void *data) 
DEFINE_SIMPLE_ATTRIBUTE(spufs_srr0_ops, spufs_srr0_get, spufs_srr0_set,

			"%llx\n")



static u64 spufs_id_get(void *data)

{

	struct spu_context *ctx = data;

	u64 num;



	spu_acquire(ctx);

	if (ctx->state == SPU_STATE_RUNNABLE)

		num = ctx->spu->number;

	else

		num = (unsigned int)-1;

	spu_release(ctx);



	return num;

}

DEFINE_SIMPLE_ATTRIBUTE(spufs_id_ops, spufs_id_get, 0, "0x%llx\n")



struct tree_descr spufs_dir_contents[] = {

	{ "mem",  &spufs_mem_fops,  0666, },

	{ "regs", &spufs_regs_fops,  0666, },
@@ -1351,5 +1367,6 @@ struct tree_descr spufs_dir_contents[] = { 
	{ "spu_tag_mask", &spufs_spu_tag_mask_ops, 0666, },

	{ "event_mask", &spufs_event_mask_ops, 0666, },

	{ "srr0", &spufs_srr0_ops, 0666, },

	{ "phys-id", &spufs_id_ops, 0666, },

	{},

};