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[POWERPC] spufs: add a phys-id attribute to each SPU context

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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: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
arnd@arndb.de 2006-06-19 20:33:24 +02:00 committed by Paul Mackerras
parent 724bd80e81
commit 7b1a701480
1 changed files with 17 additions and 0 deletions
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17
arch/powerpc/platforms/cell/spufs/file.c
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@ -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, },
{},
};