[dpdk-dev] [EXT] Re: [PATCH] net/af_packet: set default blocksize to pagesize
Krzysztof Kanas
kkanas at marvell.com
Wed Jul 3 11:42:41 CEST 2019
On 19-06-27 19:25, Ferruh Yigit wrote:
> External Email
>
> ----------------------------------------------------------------------
> On 6/24/2019 3:32 PM, kkanas at marvell.com wrote:
> > From: Krzysztof Kanas <kkanas at marvell.com>
> >
> > Kernel validates block size to be aligned to page size. Code works on
> > platforms with page size 4k, but on others e.g. Arm64 fails with default
> > parameters.
>
> What is the pagesize in arm64?
On aarch64 it is configurable. Linux kernel, supports sizes 4k, 16k, 64k
see ARM64_64K_PAGES in arch/arm64/Kconfig.
>
> >
> > Signed-off-by: Krzysztof Kanas <kkanas at marvell.com>
> > ---
> > drivers/net/af_packet/rte_eth_af_packet.c | 4 ++--
> > 1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/net/af_packet/rte_eth_af_packet.c b/drivers/net/af_packet/rte_eth_af_packet.c
> > index 4a660d5f013f..ec3d2cbb5202 100644
> > --- a/drivers/net/af_packet/rte_eth_af_packet.c
> > +++ b/drivers/net/af_packet/rte_eth_af_packet.c
> > @@ -32,7 +32,6 @@
> > #define ETH_AF_PACKET_FRAMECOUNT_ARG "framecnt"
> > #define ETH_AF_PACKET_QDISC_BYPASS_ARG "qdisc_bypass"
> >
> > -#define DFLT_BLOCK_SIZE (1 << 12)
> > #define DFLT_FRAME_SIZE (1 << 11)
> > #define DFLT_FRAME_COUNT (1 << 9)
> >
> > @@ -811,7 +810,7 @@ rte_eth_from_packet(struct rte_vdev_device *dev,
> > struct rte_kvargs_pair *pair = NULL;
> > unsigned k_idx;
> > unsigned int blockcount;
> > - unsigned int blocksize = DFLT_BLOCK_SIZE;
> > + unsigned int blocksize;
> > unsigned int framesize = DFLT_FRAME_SIZE;
> > unsigned int framecount = DFLT_FRAME_COUNT;
> > unsigned int qpairs = 1;
> > @@ -821,6 +820,7 @@ rte_eth_from_packet(struct rte_vdev_device *dev,
> > if (*sockfd < 0)
> > return -1;
> >
> > + blocksize = getpagesize();
> > /*
> > * Walk arguments for configurable settings
> > */
> >
>
--
-
Regards,
Krzysztof(Chris) Kanas
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