Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=46deed...
Commit: 46deed69b34d0aa6065e92ad79685e103d4ccd35
Parent: 0db9360aaa9b95b0cf67f82874809f16e68068eb
Author: Luke Browning <lukebrowning@us.ibm.com>
AuthorDate: Mon Jun 16 11:36:43 2008 +1000
Committer: Jeremy Kerr <jk@ozlabs.org>
CommitDate: Wed Jul 9 10:13:40 2008 +1000
powerpc/spufs: provide context debug file
Add a ctxt file to spufs that shows spu context information that is used
in scheduling. This info can be used for debugging spufs scheduler
issues, and to isolate between application and spufs problems as it
shows a lot of state such as priorities and dispatch counts.
This file contains internal spufs state and is subject to change at any
time, and therefore no applications should depend on it. The file is
intended for the use of spufs kernel developers.
Signed-off-by: Luke Browning <lukebrowning@us.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
---
arch/powerpc/platforms/cell/spufs/file.c | 54 ++++++++++++++++++++++++++++++
1 files changed, 54 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
index f742599..fc595d0 100644
--- a/arch/powerpc/platforms/cell/spufs/file.c
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -2555,6 +2555,58 @@ void spu_switch_log_notify(struct spu *spu, struct spu_context *ctx,
wake_up(&ctx->switch_log->wait);
}
+static int spufs_show_ctx(struct seq_file *s, void *private)
+{
+ struct spu_context *ctx = s->private;
+ u64 mfc_control_RW;
+
+ mutex_lock(&ctx->state_mutex);
+ if (ctx->spu) {
+ struct spu *spu = ctx->spu;
+ struct spu_priv2 __iomem *priv2 = spu->priv2;
+
+ spin_lock_irq(&spu->register_lock);
+ mfc_control_RW = in_be64(&priv2->mfc_control_RW);
+ spin_unlock_irq(&spu->register_lock);
+ } else {
+ struct spu_state *csa = &ctx->csa;
+
+ mfc_control_RW = csa->priv2.mfc_control_RW;
+ }
+
+ seq_printf(s, "%c flgs(%lx) sflgs(%lx) pri(%d) ts(%d) spu(%02d)"
+ " %c %lx %lx %lx %lx %x %x\n",
+ ctx->state == SPU_STATE_SAVED ? 'S' : 'R',
+ ctx->flags,
+ ctx->sched_flags,
+ ctx->prio,
+ ctx->time_slice,
+ ctx->spu ? ctx->spu->number : -1,
+ !list_empty(&ctx->rq) ? 'q' : ' ',
+ ctx->csa.class_0_pending,
+ ctx->csa.class_0_dar,
+ ctx->csa.class_1_dsisr,
+ mfc_control_RW,
+ ctx->ops->runcntl_read(ctx),
+ ctx->ops->status_read(ctx));
+
+ mutex_unlock(&ctx->state_mutex);
+
+ return 0;
+}
+
+static int spufs_ctx_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, spufs_show_ctx, SPUFS_I(inode)->i_ctx);
+}
+
+static const struct file_operations spufs_ctx_fops = {
+ .open = spufs_ctx_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, },
@@ -2591,6 +2643,7 @@ struct tree_descr spufs_dir_contents[] = {
{ "tid", &spufs_tid_fops, 0444, },
{ "stat", &spufs_stat_fops, 0444, },
{ "switch_log", &spufs_switch_log_fops, 0444 },
+ { ".ctx", &spufs_ctx_fops, 0444, },
{},
};
@@ -2616,6 +2669,7 @@ struct tree_descr spufs_dir_nosched_contents[] = {
{ "object-id", &spufs_object_id_ops, 0666, },
{ "tid", &spufs_tid_fops, 0444, },
{ "stat", &spufs_stat_fops, 0444, },
+ { ".ctx", &spufs_ctx_fops, 0444, },
{},
};
--
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
