aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/s390
diff options
context:
space:
mode:
authorJan Glauber <jang@linux.vnet.ibm.com>2011-10-30 10:17:05 -0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2011-10-30 10:16:45 -0400
commita2b86019826cb97fd964fbaf101410c64cd78681 (patch)
treeda7659c2d90dcfd83d23ba3f432baa9f84aa80a2 /drivers/s390
parent80376f347d70ce5fcfb98105d83624518e0911d6 (diff)
[S390] qdio: add timestamp for last queue scan time
Add a timestamp per queue and update the timestamp when the queue is scanned. Add the queue timestamps and the timestamp of the last adapter interrupt to the debugfs output. The timestamps are useful for debugging stall conditions. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/cio/qdio.h5
-rw-r--r--drivers/s390/cio/qdio_debug.c10
-rw-r--r--drivers/s390/cio/qdio_main.c4
-rw-r--r--drivers/s390/cio/qdio_thinint.c2
4 files changed, 16 insertions, 5 deletions
diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h
index 3dd86441da3..c15624b7690 100644
--- a/drivers/s390/cio/qdio.h
+++ b/drivers/s390/cio/qdio.h
@@ -290,6 +290,9 @@ struct qdio_q {
290 /* error condition during a data transfer */ 290 /* error condition during a data transfer */
291 unsigned int qdio_error; 291 unsigned int qdio_error;
292 292
293 /* last scan of the queue */
294 u64 timestamp;
295
293 struct tasklet_struct tasklet; 296 struct tasklet_struct tasklet;
294 struct qdio_queue_perf_stat q_stats; 297 struct qdio_queue_perf_stat q_stats;
295 298
@@ -449,6 +452,8 @@ static inline int shared_ind(struct qdio_q *q)
449 return references_shared_dsci(i) || has_multiple_inq_on_dsci(i); 452 return references_shared_dsci(i) || has_multiple_inq_on_dsci(i);
450} 453}
451 454
455extern u64 last_ai_time;
456
452/* prototypes for thin interrupt */ 457/* prototypes for thin interrupt */
453void qdio_setup_thinint(struct qdio_irq *irq_ptr); 458void qdio_setup_thinint(struct qdio_irq *irq_ptr);
454int qdio_establish_thinint(struct qdio_irq *irq_ptr); 459int qdio_establish_thinint(struct qdio_irq *irq_ptr);
diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c
index aaf7f935bfd..ed68245f974 100644
--- a/drivers/s390/cio/qdio_debug.c
+++ b/drivers/s390/cio/qdio_debug.c
@@ -54,15 +54,17 @@ static int qstat_show(struct seq_file *m, void *v)
54 if (!q) 54 if (!q)
55 return 0; 55 return 0;
56 56
57 seq_printf(m, "DSCI: %d nr_used: %d\n", 57 seq_printf(m, "Timestamp: %Lx Last AI: %Lx\n",
58 *(u32 *)q->irq_ptr->dsci, atomic_read(&q->nr_buf_used)); 58 q->timestamp, last_ai_time);
59 seq_printf(m, "ftc: %d last_move: %d\n", 59 seq_printf(m, "nr_used: %d ftc: %d last_move: %d\n",
60 atomic_read(&q->nr_buf_used),
60 q->first_to_check, q->last_move); 61 q->first_to_check, q->last_move);
61 if (q->is_input_q) { 62 if (q->is_input_q) {
62 seq_printf(m, "polling: %d ack start: %d ack count: %d\n", 63 seq_printf(m, "polling: %d ack start: %d ack count: %d\n",
63 q->u.in.polling, q->u.in.ack_start, 64 q->u.in.polling, q->u.in.ack_start,
64 q->u.in.ack_count); 65 q->u.in.ack_count);
65 seq_printf(m, "IRQs disabled: %u\n", 66 seq_printf(m, "DSCI: %d IRQs disabled: %u\n",
67 *(u32 *)q->irq_ptr->dsci,
66 test_bit(QDIO_QUEUE_IRQS_DISABLED, 68 test_bit(QDIO_QUEUE_IRQS_DISABLED,
67 &q->u.in.queue_irq_state)); 69 &q->u.in.queue_irq_state));
68 } 70 }
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index 7ded1b26fd2..a76d6764ce6 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -512,6 +512,8 @@ static int get_inbound_buffer_frontier(struct qdio_q *q)
512 int count, stop; 512 int count, stop;
513 unsigned char state = 0; 513 unsigned char state = 0;
514 514
515 q->timestamp = get_clock_fast();
516
515 /* 517 /*
516 * Don't check 128 buffers, as otherwise qdio_inbound_q_moved 518 * Don't check 128 buffers, as otherwise qdio_inbound_q_moved
517 * would return 0. 519 * would return 0.
@@ -781,6 +783,8 @@ static int get_outbound_buffer_frontier(struct qdio_q *q)
781 int count, stop; 783 int count, stop;
782 unsigned char state = 0; 784 unsigned char state = 0;
783 785
786 q->timestamp = get_clock_fast();
787
784 if (need_siga_sync(q)) 788 if (need_siga_sync(q))
785 if (((queue_type(q) != QDIO_IQDIO_QFMT) && 789 if (((queue_type(q) != QDIO_IQDIO_QFMT) &&
786 !pci_out_supported(q)) || 790 !pci_out_supported(q)) ||
diff --git a/drivers/s390/cio/qdio_thinint.c b/drivers/s390/cio/qdio_thinint.c
index a3e3949d7b6..8c1f412b7e6 100644
--- a/drivers/s390/cio/qdio_thinint.c
+++ b/drivers/s390/cio/qdio_thinint.c
@@ -36,7 +36,7 @@ static u8 *tiqdio_alsi;
36 36
37struct indicator_t *q_indicators; 37struct indicator_t *q_indicators;
38 38
39static u64 last_ai_time; 39u64 last_ai_time;
40 40
41/* returns addr for the device state change indicator */ 41/* returns addr for the device state change indicator */
42static u32 *get_indicator(void) 42static u32 *get_indicator(void)