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* [PATCH] net/mlx5: fix linux stats gathering function
@ 2022-03-17 13:23 Geoffrey Le Gourriérec
  2022-05-08 14:21 ` Bassam Zaid AlKilani
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: Geoffrey Le Gourriérec @ 2022-03-17 13:23 UTC (permalink / raw)
  To: dev; +Cc: Didier Pallard, Matan Azrad, Viacheslav Ovsiienko

This patch encompasses a few fixes carried by a previous patch
that aimed to support bonding device stats counting.

- If mlx5_os_read_dev_stat fails, it returns 1 instead of a
  negative value, causing mlx5_xstats_get to return an invalid
  number of counters. Since this error is not blocking, do not
  mess ret value with mlx5_os_read_dev_stat returned value.

  This allows avoiding the very annoying log:
  "n_xstats != n_xstats_names => skipping"

- Invert the check for mlx5_os_read_dev_stat(), currently leading
  us to store the result if the function failed, and use a
  backup value if it succeeded, which is the opposite of what we
  actually want. Revert to the original (correct) test.

- Add missing test on _mlx5_os_read_dev_counters() to prevent
  using trash stats values.

Fixes: 7ed15acdcd69 ("net/mlx5: improve xstats of bonding port")
Signed-off-by: Didier Pallard <didier.pallard@6wind.com>
Signed-off-by: Geoffrey Le Gourriérec <geoffrey.le_gourrierec@6wind.com>
---
 drivers/net/mlx5/linux/mlx5_ethdev_os.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/mlx5/linux/mlx5_ethdev_os.c b/drivers/net/mlx5/linux/mlx5_ethdev_os.c
index 8fe73f1adb58..b5819cc656ff 100644
--- a/drivers/net/mlx5/linux/mlx5_ethdev_os.c
+++ b/drivers/net/mlx5/linux/mlx5_ethdev_os.c
@@ -1386,15 +1386,16 @@ mlx5_os_read_dev_counters(struct rte_eth_dev *dev, uint64_t *stats)
 		}
 	} else {
 		ret = _mlx5_os_read_dev_counters(dev, -1, stats);
+		if (ret)
+			return ret;
 	}
 	/* Read IB counters. */
 	for (i = 0; i != xstats_ctrl->mlx5_stats_n; ++i) {
 		if (!xstats_ctrl->info[i].dev)
 			continue;
-		ret = mlx5_os_read_dev_stat(priv, xstats_ctrl->info[i].ctr_name,
-					    &stats[i]);
 		/* return last xstats counter if fail to read. */
-		if (ret != 0)
+		if (mlx5_os_read_dev_stat(priv, xstats_ctrl->info[i].ctr_name,
+			    &stats[i]) == 0)
 			xstats_ctrl->xstats[i] = stats[i];
 		else
 			stats[i] = xstats_ctrl->xstats[i];
-- 
2.30.2


^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2022-06-05 15:05 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-03-17 13:23 [PATCH] net/mlx5: fix linux stats gathering function Geoffrey Le Gourriérec
2022-05-08 14:21 ` Bassam Zaid AlKilani
2022-06-02  9:01 ` Matan Azrad
2022-06-05 15:05 ` Raslan Darawsheh

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