net: mvneta: set real interrupt per packet for tx_done
Commitaebea2ba0f
("net: mvneta: fix Tx interrupt delay") intended to set coalescing threshold to a value guaranteeing interrupt generation per each sent packet, so that buffers can be released with no delay. In fact setting threshold to '1' was wrong, because it causes interrupt every two packets. According to the documentation a reason behind it is following - interrupt occurs once sent buffers counter reaches a value, which is higher than one specified in MVNETA_TXQ_SIZE_REG(q). This behavior was confirmed during tests. Also when testing the SoC working as a NAS device, better performance was observed with int-per-packet, as it strongly depends on the fact that all transmitted packets are released immediately. This commit enables NETA controller work in interrupt per sent packet mode by setting coalescing threshold to 0. Signed-off-by: Dmitri Epshtein <dima@marvell.com> Signed-off-by: Marcin Wojtas <mw@semihalf.com> Cc: <stable@vger.kernel.org> # v3.10+ Fixesaebea2ba0f
("net: mvneta: fix Tx interrupt delay") Acked-by: Willy Tarreau <w@1wt.eu> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
bc86765181
commit
06708f8152
|
@ -244,7 +244,7 @@
|
|||
/* Various constants */
|
||||
|
||||
/* Coalescing */
|
||||
#define MVNETA_TXDONE_COAL_PKTS 1
|
||||
#define MVNETA_TXDONE_COAL_PKTS 0 /* interrupt per packet */
|
||||
#define MVNETA_RX_COAL_PKTS 32
|
||||
#define MVNETA_RX_COAL_USEC 100
|
||||
|
||||
|
|
Loading…
Reference in a new issue