[dpdk-stable] [PATCH v2] config: enable more than 128 cores for Arm64 platform

[Joyce Kong (Arm Technology China)]

> -----Original Message-----
> From: Jerin Jacob <jerin.jacob at caviumnetworks.com>
> Sent: Wednesday, November 21, 2018 7:35 PM
> To: Joyce Kong (Arm Technology China) <Joyce.Kong at arm.com>
> Cc: dev at dpdk.org; thomas at monjalon.net; Honnappa Nagarahalli
> <Honnappa.Nagarahalli at arm.com>; Gavin Hu (Arm Technology China)
> <Gavin.Hu at arm.com>; stable at dpdk.org
> Subject: Re: [PATCH v2] config: enable more than 128 cores for Arm64
> platform
>
> -----Original Message-----
> > Date: Wed, 21 Nov 2018 19:27:12 +0800
> > From: Joyce Kong <joyce.kong at arm.com>
> > To: dev at dpdk.org
> > CC: thomas at monjalon.net, jerin.jacob at caviumnetworks.com,
> > Honnappa.Nagarahalli at arm.com, gavin.hu at arm.com, stable at dpdk.org
> > Subject: [PATCH v2] config: enable more than 128 cores for Arm64
> > platform
> > X-Mailer: git-send-email 2.7.4
> >
> >
> > When running dpdk applications on cores whose ids are bigger than
> > original max_core setting, eal error as below:
> > EAL: Detected 104 lcore(s)
> > EAL: Detected 2 NUMA nodes
> > EAL: invalid core list
> > -l CORELIST core indexes between 0 and 128
> >
> > The fix is to increase max_core to 256 on Arm64 platform.
> >
> > Fixes: b3ce00e5 ("mk: introduce ARMv8 architecture")
> > Cc: stable at dpdk.org
> >
> > Signed-off-by: Joyce Kong <joyce.kong at arm.com>
> > Reviewed-by: Gavin Hu <gavin.hu at arm.com>
> > ---
> >  config/arm/meson.build                     | 2 +-
> >  config/defconfig_arm64-armv8a-linuxapp-gcc | 1 +
> >  2 files changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/config/arm/meson.build b/config/arm/meson.build index
> > b755138..020df09 100644
> > --- a/config/arm/meson.build
> > +++ b/config/arm/meson.build
> > @@ -51,7 +51,7 @@ flags_cavium = [
> >         ['RTE_MACHINE', '"thunderx"'],
> >         ['RTE_CACHE_LINE_SIZE', 128],
> >         ['RTE_MAX_NUMA_NODES', 2],
> > -       ['RTE_MAX_LCORE', 96],
> > +       ['RTE_MAX_LCORE', 256],
>
> This change makes thunderx config to 256 cores not armv8.
> For generic config, it needs to be under "flags_generic"
> not under "flags_cavium". Just like you did for updating defconfig_arm64-
> armv8a-linuxapp-gcc config instead of defconfig_arm64-thunderx-linuxapp-
> gcc
>

Config to 256 cores for both flags_generic and flags_cavium in V3.
For thunderx, it will do meson build according to flasg_cavium instead of flags_generic.
And there is no inheritance relationship between the two flags.

> >         ['RTE_MAX_VFIO_GROUPS', 128],
> >         ['RTE_USE_C11_MEM_MODEL', false]]  flags_dpaa = [ diff --git
> > a/config/defconfig_arm64-armv8a-linuxapp-gcc
> > b/config/defconfig_arm64-armv8a-linuxapp-gcc
> > index 1842744..a6ed90c 100644
> > --- a/config/defconfig_arm64-armv8a-linuxapp-gcc
> > +++ b/config/defconfig_arm64-armv8a-linuxapp-gcc
> > @@ -6,3 +6,4 @@
> >
> >  CONFIG_RTE_TOOLCHAIN="gcc"
> >  CONFIG_RTE_TOOLCHAIN_GCC=y
> > +CONFIG_RTE_MAX_LCORE=256
> > --
> > 2.7.4
> >
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