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| author | Jan Glauber <jang@linux.vnet.ibm.com> | 2008-12-25 13:38:47 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-25 13:38:59 +0100 |
| commit | 50f769df1c4bea766c4eb927eae35728fb93e305 (patch) | |
| tree | c86228e6965de0ea84bddc2104d7dfa339e2a187 /drivers/s390/cio/qdio_perf.c | |
| parent | 22f9934767f49012ffbae753b28b8055bd28348f (diff) | |
| download | linux-50f769df1c4bea766c4eb927eae35728fb93e305.tar.bz2 | |
[S390] qdio: improve inbound buffer acknowledgement
- Use automatic acknowledgement of incoming buffers in QEBSM mode
- Move ACK for non-QEBSM mode always to the newest buffer to prevent
a race with qdio_stop_polling
- Remove the polling spinlock, the upper layer drivers return new buffers
in the same code path and could not run in parallel
- Don't flood the error log in case of no-target-buffer-empty
- In handle_inbound we check if we would overwrite an ACK'ed buffer, if so
advance the pointer to the oldest ACK'ed buffer so we don't overwrite an
empty buffer in qdio_stop_polling
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_perf.c')
| -rw-r--r-- | drivers/s390/cio/qdio_perf.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/s390/cio/qdio_perf.c b/drivers/s390/cio/qdio_perf.c index bec01100f8e8..136d0f0b1e93 100644 --- a/drivers/s390/cio/qdio_perf.c +++ b/drivers/s390/cio/qdio_perf.c @@ -74,6 +74,8 @@ static int qdio_perf_proc_show(struct seq_file *m, void *v) seq_printf(m, "\n"); seq_printf(m, "Number of fast requeues (outg. SBAL w/o SIGA)\t: %li\n", (long)atomic_long_read(&perf_stats.fast_requeue)); + seq_printf(m, "Number of outbound target full condition\t: %li\n", + (long)atomic_long_read(&perf_stats.outbound_target_full)); seq_printf(m, "Number of outbound tasklet mod_timer calls\t: %li\n", (long)atomic_long_read(&perf_stats.debug_tl_out_timer)); seq_printf(m, "Number of stop polling calls\t\t\t: %li\n", |