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authorLuke Browning <lukebrowning@us.ibm.com>2008-06-16 11:36:43 +1000
committerJeremy Kerr <jk@ozlabs.org>2008-07-09 10:13:40 +1000
commit46deed69b34d0aa6065e92ad79685e103d4ccd35 (patch)
treed66d31e0eceb3c6b5eeb0b17a673d973845474e6 /arch/powerpc/platforms
parent0db9360aaa9b95b0cf67f82874809f16e68068eb (diff)
downloadlinaro-lsk-46deed69b34d0aa6065e92ad79685e103d4ccd35.tar.gz
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>
Diffstat (limited to 'arch/powerpc/platforms')
-rw-r--r--arch/powerpc/platforms/cell/spufs/file.c54
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 f74259979cb..fc595d0db21 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, },
{},
};