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authorOmar Sandoval <osandov@fb.com>2017-05-04 07:31:33 (GMT)
committerJens Axboe <axboe@fb.com>2017-05-04 14:25:17 (GMT)
commit16b738f651c83a01db057e5db02ec4b830af9130 (patch)
treeb2d8d7399a0ec9dc103494ec67926d24ec4b54eb /block/kyber-iosched.c
parentd332ce091813d11a46144354baa72b755833392f (diff)
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kyber: add debugfs attributes
Expose the domain token pools, asynchronous sbitmap depth, domain request lists, and batching state. Signed-off-by: Omar Sandoval <osandov@fb.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/kyber-iosched.c')
-rw-r--r--block/kyber-iosched.c130
1 files changed, 130 insertions, 0 deletions
diff --git a/block/kyber-iosched.c b/block/kyber-iosched.c
index 3b0090b..b9faabc 100644
--- a/block/kyber-iosched.c
+++ b/block/kyber-iosched.c
@@ -26,6 +26,7 @@
#include "blk.h"
#include "blk-mq.h"
+#include "blk-mq-debugfs.h"
#include "blk-mq-sched.h"
#include "blk-mq-tag.h"
#include "blk-stat.h"
@@ -683,6 +684,131 @@ static struct elv_fs_entry kyber_sched_attrs[] = {
};
#undef KYBER_LAT_ATTR
+#ifdef CONFIG_BLK_DEBUG_FS
+#define KYBER_DEBUGFS_DOMAIN_ATTRS(domain, name) \
+static int kyber_##name##_tokens_show(void *data, struct seq_file *m) \
+{ \
+ struct request_queue *q = data; \
+ struct kyber_queue_data *kqd = q->elevator->elevator_data; \
+ \
+ sbitmap_queue_show(&kqd->domain_tokens[domain], m); \
+ return 0; \
+} \
+ \
+static void *kyber_##name##_rqs_start(struct seq_file *m, loff_t *pos) \
+ __acquires(&khd->lock) \
+{ \
+ struct blk_mq_hw_ctx *hctx = m->private; \
+ struct kyber_hctx_data *khd = hctx->sched_data; \
+ \
+ spin_lock(&khd->lock); \
+ return seq_list_start(&khd->rqs[domain], *pos); \
+} \
+ \
+static void *kyber_##name##_rqs_next(struct seq_file *m, void *v, \
+ loff_t *pos) \
+{ \
+ struct blk_mq_hw_ctx *hctx = m->private; \
+ struct kyber_hctx_data *khd = hctx->sched_data; \
+ \
+ return seq_list_next(v, &khd->rqs[domain], pos); \
+} \
+ \
+static void kyber_##name##_rqs_stop(struct seq_file *m, void *v) \
+ __releases(&khd->lock) \
+{ \
+ struct blk_mq_hw_ctx *hctx = m->private; \
+ struct kyber_hctx_data *khd = hctx->sched_data; \
+ \
+ spin_unlock(&khd->lock); \
+} \
+ \
+static const struct seq_operations kyber_##name##_rqs_seq_ops = { \
+ .start = kyber_##name##_rqs_start, \
+ .next = kyber_##name##_rqs_next, \
+ .stop = kyber_##name##_rqs_stop, \
+ .show = blk_mq_debugfs_rq_show, \
+}; \
+ \
+static int kyber_##name##_waiting_show(void *data, struct seq_file *m) \
+{ \
+ struct blk_mq_hw_ctx *hctx = data; \
+ struct kyber_hctx_data *khd = hctx->sched_data; \
+ wait_queue_t *wait = &khd->domain_wait[domain]; \
+ \
+ seq_printf(m, "%d\n", !list_empty_careful(&wait->task_list)); \
+ return 0; \
+}
+KYBER_DEBUGFS_DOMAIN_ATTRS(KYBER_READ, read)
+KYBER_DEBUGFS_DOMAIN_ATTRS(KYBER_SYNC_WRITE, sync_write)
+KYBER_DEBUGFS_DOMAIN_ATTRS(KYBER_OTHER, other)
+#undef KYBER_DEBUGFS_DOMAIN_ATTRS
+
+static int kyber_async_depth_show(void *data, struct seq_file *m)
+{
+ struct request_queue *q = data;
+ struct kyber_queue_data *kqd = q->elevator->elevator_data;
+
+ seq_printf(m, "%u\n", kqd->async_depth);
+ return 0;
+}
+
+static int kyber_cur_domain_show(void *data, struct seq_file *m)
+{
+ struct blk_mq_hw_ctx *hctx = data;
+ struct kyber_hctx_data *khd = hctx->sched_data;
+
+ switch (khd->cur_domain) {
+ case KYBER_READ:
+ seq_puts(m, "READ\n");
+ break;
+ case KYBER_SYNC_WRITE:
+ seq_puts(m, "SYNC_WRITE\n");
+ break;
+ case KYBER_OTHER:
+ seq_puts(m, "OTHER\n");
+ break;
+ default:
+ seq_printf(m, "%u\n", khd->cur_domain);
+ break;
+ }
+ return 0;
+}
+
+static int kyber_batching_show(void *data, struct seq_file *m)
+{
+ struct blk_mq_hw_ctx *hctx = data;
+ struct kyber_hctx_data *khd = hctx->sched_data;
+
+ seq_printf(m, "%u\n", khd->batching);
+ return 0;
+}
+
+#define KYBER_QUEUE_DOMAIN_ATTRS(name) \
+ {#name "_tokens", 0400, kyber_##name##_tokens_show}
+static const struct blk_mq_debugfs_attr kyber_queue_debugfs_attrs[] = {
+ KYBER_QUEUE_DOMAIN_ATTRS(read),
+ KYBER_QUEUE_DOMAIN_ATTRS(sync_write),
+ KYBER_QUEUE_DOMAIN_ATTRS(other),
+ {"async_depth", 0400, kyber_async_depth_show},
+ {},
+};
+#undef KYBER_QUEUE_DOMAIN_ATTRS
+
+#define KYBER_HCTX_DOMAIN_ATTRS(name) \
+ {#name "_rqs", 0400, .seq_ops = &kyber_##name##_rqs_seq_ops}, \
+ {#name "_waiting", 0400, kyber_##name##_waiting_show}
+static const struct blk_mq_debugfs_attr kyber_hctx_debugfs_attrs[] = {
+ KYBER_HCTX_DOMAIN_ATTRS(read),
+ KYBER_HCTX_DOMAIN_ATTRS(sync_write),
+ KYBER_HCTX_DOMAIN_ATTRS(other),
+ {"cur_domain", 0400, kyber_cur_domain_show},
+ {"batching", 0400, kyber_batching_show},
+ {},
+};
+#undef KYBER_HCTX_DOMAIN_ATTRS
+#endif
+
static struct elevator_type kyber_sched = {
.ops.mq = {
.init_sched = kyber_init_sched,
@@ -696,6 +822,10 @@ static struct elevator_type kyber_sched = {
.has_work = kyber_has_work,
},
.uses_mq = true,
+#ifdef CONFIG_BLK_DEBUG_FS
+ .queue_debugfs_attrs = kyber_queue_debugfs_attrs,
+ .hctx_debugfs_attrs = kyber_hctx_debugfs_attrs,
+#endif
.elevator_attrs = kyber_sched_attrs,
.elevator_name = "kyber",
.elevator_owner = THIS_MODULE,