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IB/qib: Add per-context stats interface

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This patch adds a debugfs stats interface for per kernel contexts
packet counts.

The code uses the opcode stats count and eliminates the counter in the
context.

Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Mike Marciniszyn 2013-06-15 17:07:09 -04:00 committed by Roland Dreier
parent ddb8876589
commit 17db3a92c1
1 changed files with 63 additions and 0 deletions
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63
drivers/infiniband/hw/qib/qib_debugfs.c
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@ -126,6 +126,68 @@ static int _opcode_stats_seq_show(struct seq_file *s, void *v)
DEBUGFS_FILE(opcode_stats)
static void *_ctx_stats_seq_start(struct seq_file *s, loff_t *pos)
{
struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
struct qib_devdata *dd = dd_from_dev(ibd);
if (!*pos)
return SEQ_START_TOKEN;
if (*pos >= dd->first_user_ctxt)
return NULL;
return pos;
}
static void *_ctx_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
struct qib_devdata *dd = dd_from_dev(ibd);
if (v == SEQ_START_TOKEN)
return pos;
++*pos;
if (*pos >= dd->first_user_ctxt)
return NULL;
return pos;
}
static void _ctx_stats_seq_stop(struct seq_file *s, void *v)
{
/* nothing allocated */
}
static int _ctx_stats_seq_show(struct seq_file *s, void *v)
{
loff_t *spos;
loff_t i, j;
u64 n_packets = 0;
struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;
struct qib_devdata *dd = dd_from_dev(ibd);
if (v == SEQ_START_TOKEN) {
seq_puts(s, "Ctx:npkts\n");
return 0;
}
spos = v;
i = *spos;
if (!dd->rcd[i])
return SEQ_SKIP;
for (j = 0; j < ARRAY_SIZE(dd->rcd[i]->opstats->stats); j++)
n_packets += dd->rcd[i]->opstats->stats[j].n_packets;
if (!n_packets)
return SEQ_SKIP;
seq_printf(s, " %llu:%llu\n", i, n_packets);
return 0;
}
DEBUGFS_FILE(ctx_stats)
void qib_dbg_ibdev_init(struct qib_ibdev *ibd)
{
char name[10];
@ -137,6 +199,7 @@ void qib_dbg_ibdev_init(struct qib_ibdev *ibd)
return;
}
DEBUGFS_FILE_CREATE(opcode_stats);
DEBUGFS_FILE_CREATE(ctx_stats);
return;
}