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authorJan Glauber <jang@linux.vnet.ibm.com>2011-10-30 15:17:05 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2011-10-30 15:16:45 +0100
commita2b86019826cb97fd964fbaf101410c64cd78681 (patch)
treeda7659c2d90dcfd83d23ba3f432baa9f84aa80a2 /drivers/s390/cio/qdio_main.c
parent80376f347d70ce5fcfb98105d83624518e0911d6 (diff)
downloadop-kernel-dev-a2b86019826cb97fd964fbaf101410c64cd78681.zip
op-kernel-dev-a2b86019826cb97fd964fbaf101410c64cd78681.tar.gz
[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/cio/qdio_main.c')
-rw-r--r--drivers/s390/cio/qdio_main.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index 7ded1b2..a76d676 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)
int count, stop;
unsigned char state = 0;
+ q->timestamp = get_clock_fast();
+
/*
* Don't check 128 buffers, as otherwise qdio_inbound_q_moved
* would return 0.
@@ -781,6 +783,8 @@ static int get_outbound_buffer_frontier(struct qdio_q *q)
int count, stop;
unsigned char state = 0;
+ q->timestamp = get_clock_fast();
+
if (need_siga_sync(q))
if (((queue_type(q) != QDIO_IQDIO_QFMT) &&
!pci_out_supported(q)) ||
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