[dpdk-dev] [EXT] [PATCH 0/8] Optimize qede use of rx/tx_entries

[Jerin Jacob]

On Mon, Mar 22, 2021 at 10:38 PM Igor Russkikh <irusskikh at marvell.com> wrote:
>
>
>
> On 3/5/2021 2:13 PM, Balazs Nemeth wrote:
> > External Email
> >
> > ----------------------------------------------------------------------
> > This patch set optimizes qede_{rx,tx}_entry and introduces
> > rte_pktmbuf_free_bulk in qede_process_tx_compl. The overall performance
> > improvement depends on the use-case; in a physical-virtual-physical test
> > on a ThunderX2 99xx system with two SMT threads used in ovs,
> > and two cores used in a vm, an improvement of around 2.55% is observed
> > due to this patch set.
> >
> > Balazs Nemeth (8):
> >   net/qede: remove flags from qede_tx_entry and simplify to rte_mbuf
> >   net/qede: avoid repeatedly calling ecore_chain_get_cons_idx
> >   net/qede: assume txq->sw_tx_ring[idx] is never null in
> >     qede_free_tx_pkt
> >   net/qede: inline qede_free_tx_pkt to prepare for rte_pktmbuf_free_bulk
> >   net/qede: use rte_pktmbuf_free_bulk instead of rte_pktmbuf_free
> >   net/qede: prefetch txq->hw_cons_ptr
> >   net/qede: prefetch next packet to free
> >   net/qede: remove page_offset from struct qede_rx_entry and simplify
> >
> >  drivers/net/qede/qede_rxtx.c | 148 +++++++++++++++++++----------------
> >  drivers/net/qede/qede_rxtx.h |  21 +----
> >  2 files changed, 81 insertions(+), 88 deletions(-)
>
> Series reviewed, for the series
>
> Acked-by: Igor Russkikh <irusskikh at marvell.com>
>
> One checkpatch warn I see in patchwork output, probably worth fixing:
>
> ERROR:POINTER_LOCATION: "(foo**)" should be "(foo **)"
> #120: FILE: drivers/net/qede/qede_rxtx.c:56:
> +       ret = rte_mempool_get_bulk(rxq->mb_pool, (void**)&rxq->sw_rx_ring[idx], count);


Hi @Balazs Nemeth

Please fix the following checkpatc.shh and check-git-log.sh issues and
add Igor reviewed by in next version.
I will merge the next version with the fixes. Updaed  this series
status in the patchwork as "Changes requested"


Wrong headline format:
        net/qede: remove flags from qede_tx_entry and simplify to rte_mbuf
        net/qede: avoid repeatedly calling ecore_chain_get_cons_idx
        net/qede: assume txq->sw_tx_ring[idx] is never null in qede_free_tx_pkt
        net/qede: inline qede_free_tx_pkt to prepare for rte_pktmbuf_free_bulk
        net/qede: use rte_pktmbuf_free_bulk instead of rte_pktmbuf_free
        net/qede: prefetch txq->hw_cons_ptr
        net/qede: remove page_offset from struct qede_rx_entry and simplify
Headline too long:
        net/qede: remove flags from qede_tx_entry and simplify to rte_mbuf
        net/qede: assume txq->sw_tx_ring[idx] is never null in qede_free_tx_pkt
        net/qede: inline qede_free_tx_pkt to prepare for rte_pktmbuf_free_bulk
        net/qede: use rte_pktmbuf_free_bulk instead of rte_pktmbuf_free
        net/qede: remove page_offset from struct qede_rx_entry and simplify

Invalid patch(es) found - checked 8 patches
check-git-log failed



### net/qede: remove flags from qede_tx_entry and simplify to rte_mbuf

WARNING:LONG_LINE: line length of 89 exceeds 80 columns
#37: FILE: drivers/net/qede/qede_rxtx.c:429:
+                                            (sizeof(txq->sw_tx_ring)
* txq->nb_tx_desc),

total: 0 errors, 1 warnings, 0 checks, 87 lines checked

### net/qede: avoid repeatedly calling ecore_chain_get_cons_idx

WARNING:BRACES: braces {} are not necessary for single statement blocks
#82: FILE: drivers/net/qede/qede_rxtx.c:934:
+       while (remaining) {
+               remaining -= qede_free_tx_pkt(txq);
+       }

total: 0 errors, 1 warnings, 0 checks, 67 lines checked

### net/qede: use rte_pktmbuf_free_bulk instead of rte_pktmbuf_free

WARNING:LONG_LINE: line length of 89 exceeds 80 columns
#48: FILE: drivers/net/qede/qede_rxtx.c:930:
+               rte_pktmbuf_free_bulk(&txq->sw_tx_ring[first_idx],
mask - first_idx + 1);

WARNING:LONG_LINE: line length of 84 exceeds 80 columns
#51: FILE: drivers/net/qede/qede_rxtx.c:933:
+               rte_pktmbuf_free_bulk(&txq->sw_tx_ring[first_idx], idx
- first_idx);

total: 0 errors, 2 warnings, 0 checks, 32 lines checked

### net/qede: prefetch next packet to free

WARNING:REPEATED_WORD: Possible repeated word: 'next'
#6:
While handling the current mbuf, pull the next next mbuf into the cache.

WARNING:BLOCK_COMMENT_STYLE: Block comments use * on subsequent lines
#21: FILE: drivers/net/qede/qede_rxtx.c:919:
+               /* Prefetch the next mbuf. Note that at least the last 4 mbufs
+                  that are prefetched will not be used in the current call. */

WARNING:BLOCK_COMMENT_STYLE: Block comments use a trailing */ on a separate line
#21: FILE: drivers/net/qede/qede_rxtx.c:919:
+                  that are prefetched will not be used in the current call. */

total: 0 errors, 3 warnings, 0 checks, 11 lines checked

### net/qede: remove page_offset from struct qede_rx_entry and simplify

WARNING:LONG_LINE: line length of 87 exceeds 80 columns
#49: FILE: drivers/net/qede/qede_rxtx.c:56:
+       ret = rte_mempool_get_bulk(rxq->mb_pool,
(void**)&rxq->sw_rx_ring[idx], count);

ERROR:POINTER_LOCATION: "(foo**)" should be "(foo **)"
#49: FILE: drivers/net/qede/qede_rxtx.c:56:
+       ret = rte_mempool_get_bulk(rxq->mb_pool,
(void**)&rxq->sw_rx_ring[idx], count);

total: 1 errors, 1 warnings, 0 checks, 174 lines checked



>
> Thanks
>   Igor