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[POWERPC] spufs: Add tid file

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The new tid file contains the ID of the thread currently running the
context, if any.  This is used so that the new spu-top and spu-ps
tools can find the thread in /proc.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Christoph Hellwig 2007-06-29 10:58:01 +10:00 committed by Paul Mackerras
parent 7022543ee4
commit 476273adc7
3 changed files with 32 additions and 0 deletions
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22
arch/powerpc/platforms/cell/spufs/file.c
View File

@ -2039,6 +2039,26 @@ static const struct file_operations spufs_proxydma_info_fops = {
.read = spufs_proxydma_info_read,
};
static int spufs_show_tid(struct seq_file *s, void *private)
{
struct spu_context *ctx = s->private;
seq_printf(s, "%d\n", ctx->tid);
return 0;
}
static int spufs_tid_open(struct inode *inode, struct file *file)
{
return single_open(file, spufs_show_tid, SPUFS_I(inode)->i_ctx);
}
static const struct file_operations spufs_tid_fops = {
.open = spufs_tid_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
struct tree_descr spufs_dir_contents[] = {
{ "capabilities", &spufs_caps_fops, 0444, },
{ "mem", &spufs_mem_fops, 0666, },
@ -2072,6 +2092,7 @@ struct tree_descr spufs_dir_contents[] = {
{ "wbox_info", &spufs_wbox_info_fops, 0444, },
{ "dma_info", &spufs_dma_info_fops, 0444, },
{ "proxydma_info", &spufs_proxydma_info_fops, 0444, },
{ "tid", &spufs_tid_fops, 0444, },
{},
};
@ -2095,6 +2116,7 @@ struct tree_descr spufs_dir_nosched_contents[] = {
{ "psmap", &spufs_psmap_fops, 0666, },
{ "phys-id", &spufs_id_ops, 0666, },
{ "object-id", &spufs_object_id_ops, 0666, },
{ "tid", &spufs_tid_fops, 0444, },
{},
};

7
arch/powerpc/platforms/cell/spufs/sched.c
View File

@ -101,6 +101,13 @@ void spu_set_timeslice(struct spu_context *ctx)
*/
void __spu_update_sched_info(struct spu_context *ctx)
{
/*
* 32-Bit assignment are atomic on powerpc, and we don't care about
* memory ordering here because retriving the controlling thread is
* per defintion racy.
*/
ctx->tid = current->pid;
/*
* We do our own priority calculations, so we normally want
* ->static_prio to start with. Unfortunately thies field

3
arch/powerpc/platforms/cell/spufs/spufs.h
View File

@ -77,6 +77,9 @@ struct spu_context {
struct list_head gang_list;
struct spu_gang *gang;
/* owner thread */
pid_t tid;
/* scheduler fields */
struct list_head rq;
unsigned int time_slice;