diff options
| author | Julian Wiedmann <jwi@linux.ibm.com> | 2020-09-15 09:04:39 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2021-02-09 15:57:04 +0100 |
| commit | bd83917155c1e60a6634dfef708972076b068c6e (patch) | |
| tree | 5d3e69938e51504989a0be8a96337c5e0359dfb7 /drivers/s390/cio/qdio_debug.c | |
| parent | s390/qdio: make thinint registration symmetric (diff) | |
| download | linux-bd83917155c1e60a6634dfef708972076b068c6e.tar.xz linux-bd83917155c1e60a6634dfef708972076b068c6e.zip | |
s390/qdio: track time of last data IRQ for each device
We currently track the time of the most recent QDIO Adapter Interrupt.
This is a system-wide timestamp (as such interrupts are not bound to
one specific qdio device).
If interrupt processing stalls on one device but is functional for a
different device, the timestamp continues to be updated and is of no
help for problem diagnosis.
So for debugging purposes also track the time of the last Data IRQ on
a per-device level. Collect this data in the legacy non-AI path as well.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'drivers/s390/cio/qdio_debug.c')
| -rw-r--r-- | drivers/s390/cio/qdio_debug.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c index 728abf7e9ccb..d091ae12c367 100644 --- a/drivers/s390/cio/qdio_debug.c +++ b/drivers/s390/cio/qdio_debug.c @@ -105,8 +105,9 @@ static int qstat_show(struct seq_file *m, void *v) if (!q) return 0; - seq_printf(m, "Timestamp: %Lx Last AI: %Lx\n", - q->timestamp, last_ai_time); + seq_printf(m, "Timestamp: %llx\n", q->timestamp); + seq_printf(m, "Last Data IRQ: %llx Last AI: %llx\n", + q->irq_ptr->last_data_irq_time, last_ai_time); seq_printf(m, "nr_used: %d ftc: %d\n", atomic_read(&q->nr_buf_used), q->first_to_check); if (q->is_input_q) { |