The following log message may appear after a slave is idle(or nearly
idle)
for a few minutes:"PMD: Failed to allocate LACP packet from pool".
And bond mode 4 negotiation may fail.
Problem: All mbufs from a slave' private pool(used exclusively for
transmitting LACPDUs)
have been allocated and are still sitting in the device's tx descriptor
ring and
other cores' mempool caches.
Solution: Ensure that each slave'tx (LACPDU) mempool owns more than
n-tx-queues * n-tx-descriptor + fwd_core_num *
per-core-mmempool-flush-threshold mbufs.
Note that the LACP tx machine fuction is the only code that allocates
from a slave's private pool. It runs in the context of the interrupt
thread, and thus it has no mempool cache of its own.
Signed-off-by: Gaoxiang Liu <liugaoxi...@huawei.com>
---
v2:
* Fixed compile issues.
---
drivers/net/bonding/rte_eth_bond_8023ad.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/bonding/rte_eth_bond_8023ad.c
b/drivers/net/bonding/rte_eth_bond_8023ad.c
index ca50583d62..831c7dc6ab 100644
--- a/drivers/net/bonding/rte_eth_bond_8023ad.c
+++ b/drivers/net/bonding/rte_eth_bond_8023ad.c
@@ -1050,6 +1050,7 @@ bond_mode_8023ad_activate_slave(struct rte_eth_dev
*bond_dev,
uint32_t total_tx_desc;
struct bond_tx_queue *bd_tx_q;
uint16_t q_id;
+ uint32_t cache_size;
/* Given slave mus not be in active list */
RTE_ASSERT(find_slave_by_id(internals->active_slaves,
@@ -1100,6 +1101,9 @@ bond_mode_8023ad_activate_slave(struct rte_eth_dev
*bond_dev,
total_tx_desc += bd_tx_q->nb_tx_desc;
}
+ cache_size = RTE_MEMPOOL_CACHE_MAX_SIZE >= 32 ?
+ 32 : RTE_MEMPOOL_CACHE_MAX_SIZE;
+ total_tx_desc = rte_lcore_count() * cache_size * 1.5;
snprintf(mem_name, RTE_DIM(mem_name), "slave_port%u_pool", slave_id);
port->mbuf_pool = rte_pktmbuf_pool_create(mem_name, total_tx_desc,
RTE_MEMPOOL_CACHE_MAX_SIZE >= 32 ?
--
2.32.0
