From e1e73e3229355de3c6945b68a94aba63f790a225 Mon Sep 17 00:00:00 2001 From: Michal Krawczyk Date: Wed, 8 Apr 2020 10:29:12 +0200 Subject: [PATCH] net/ena: add Tx drops statistic ENA device can report in the AENQ handler amount of Tx packets that were dropped and not sent. This statistic is showing global value for the device and because rte_eth_stats is missing field that could indicate this value (it isn't the Tx error), it is being presented as a extended statistic. As the current design of extended statistics prevents tx_drops from being an atomic variable and both tx_drops and rx_drops are only updated from the AENQ handler, both were set as non-atomic for the alignment. Signed-off-by: Michal Krawczyk Reviewed-by: Igor Chauskin Reviewed-by: Guy Tzalik --- doc/guides/rel_notes/release_20_05.rst | 1 + drivers/net/ena/ena_ethdev.c | 11 ++++++++--- drivers/net/ena/ena_ethdev.h | 8 +++++++- 3 files changed, 16 insertions(+), 4 deletions(-) diff --git a/doc/guides/rel_notes/release_20_05.rst b/doc/guides/rel_notes/release_20_05.rst index 4117ba3b64..e0cdf18f08 100644 --- a/doc/guides/rel_notes/release_20_05.rst +++ b/doc/guides/rel_notes/release_20_05.rst @@ -87,6 +87,7 @@ New Features Updated ena PMD with new features and improvements, including: * Added support for large LLQ (Low-latency queue) headers. + * Added Tx drops as new extended driver statistic. * **Updated Intel i40e driver.** diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c index 07feb62c3f..0d4523c1da 100644 --- a/drivers/net/ena/ena_ethdev.c +++ b/drivers/net/ena/ena_ethdev.c @@ -96,6 +96,7 @@ static const struct ena_stats ena_stats_global_strings[] = { ENA_STAT_GLOBAL_ENTRY(wd_expired), ENA_STAT_GLOBAL_ENTRY(dev_start), ENA_STAT_GLOBAL_ENTRY(dev_stop), + ENA_STAT_GLOBAL_ENTRY(tx_drops), }; static const struct ena_stats ena_stats_tx_strings[] = { @@ -938,7 +939,7 @@ static void ena_stats_restart(struct rte_eth_dev *dev) rte_atomic64_init(&adapter->drv_stats->ierrors); rte_atomic64_init(&adapter->drv_stats->oerrors); rte_atomic64_init(&adapter->drv_stats->rx_nombuf); - rte_atomic64_init(&adapter->drv_stats->rx_drops); + adapter->drv_stats->rx_drops = 0; } static int ena_stats_get(struct rte_eth_dev *dev, @@ -972,7 +973,7 @@ static int ena_stats_get(struct rte_eth_dev *dev, ena_stats.tx_bytes_low); /* Driver related stats */ - stats->imissed = rte_atomic64_read(&adapter->drv_stats->rx_drops); + stats->imissed = adapter->drv_stats->rx_drops; stats->ierrors = rte_atomic64_read(&adapter->drv_stats->ierrors); stats->oerrors = rte_atomic64_read(&adapter->drv_stats->oerrors); stats->rx_nombuf = rte_atomic64_read(&adapter->drv_stats->rx_nombuf); @@ -2785,12 +2786,16 @@ static void ena_keep_alive(void *adapter_data, struct ena_adapter *adapter = adapter_data; struct ena_admin_aenq_keep_alive_desc *desc; uint64_t rx_drops; + uint64_t tx_drops; adapter->timestamp_wd = rte_get_timer_cycles(); desc = (struct ena_admin_aenq_keep_alive_desc *)aenq_e; rx_drops = ((uint64_t)desc->rx_drops_high << 32) | desc->rx_drops_low; - rte_atomic64_set(&adapter->drv_stats->rx_drops, rx_drops); + tx_drops = ((uint64_t)desc->tx_drops_high << 32) | desc->tx_drops_low; + + adapter->drv_stats->rx_drops = rx_drops; + adapter->dev_stats.tx_drops = tx_drops; } /** diff --git a/drivers/net/ena/ena_ethdev.h b/drivers/net/ena/ena_ethdev.h index ed3674b202..5afce25f13 100644 --- a/drivers/net/ena/ena_ethdev.h +++ b/drivers/net/ena/ena_ethdev.h @@ -134,13 +134,19 @@ struct ena_driver_stats { rte_atomic64_t ierrors; rte_atomic64_t oerrors; rte_atomic64_t rx_nombuf; - rte_atomic64_t rx_drops; + u64 rx_drops; }; struct ena_stats_dev { u64 wd_expired; u64 dev_start; u64 dev_stop; + /* + * Tx drops cannot be reported as the driver statistic, because DPDK + * rte_eth_stats structure isn't providing appropriate field for that. + * As a workaround it is being published as an extended statistic. + */ + u64 tx_drops; }; struct ena_offloads { -- 2.20.1