Dear George,
This specific issue isn't anywhere near as bad as you might think. As given,
the code confuses 128-bit vectors with 256-bit vectors, and 64-bit vectors with
128-bit vectors.
Question: does the hardware involved support 256-bit vectors? Probably not...
It almost certainly does support 128-bit vectors.
To make progress, use the known-good u8x16 / 128-bit vector code:
static_always_inline void
dpdk_buffer_init_from_template (void *d0, void *d1, void *d2, void *d3,
void *s)
{
#if defined(CLIB_HAVE_VEC128)
int i;
for (i = 0; i < 4; i++)
{
*(u8x16 *) (((u8 *) d0) + i * 16) =
*(u8x16 *) (((u8 *) d1) + i * 16) =
*(u8x16 *) (((u8 *) d2) + i * 16) =
*(u8x16 *) (((u8 *) d3) + i * 16) = *(u8x16 *) (((u8 *) s) + i * 16);
}
#else
#error "CLIB_HAVE_VEC128 has to be defined"
#endif
}
Responsible parties - they know who they are - will be back from PTO shortly.
We need to clean up / create CLIB_HAVE_VEC_256 and move the 256-bit vector
engine code...
You could also try adding "typedef u8 u8x32 _vector_size(32)" but I somehow
doubt that will produce anything other than a compiler error.
HTH... Dave
From: vpp-dev-boun...@lists.fd.io [mailto:vpp-dev-boun...@lists.fd.io] On
Behalf Of George Zhao
Sent: Friday, August 18, 2017 7:32 PM
To: 'vpp-dev@lists.fd.io' <vpp-dev@lists.fd.io>; 'disc...@lists.fd.io'
<disc...@lists.fd.io>; 'csit-...@lists.fd.io' <csit-...@lists.fd.io>
Subject: [vpp-dev] Question about VPP support for ARM 64
We encounter following issues while trying to build VPP over ARM 64. It seems
right now only ARM32 are supported in the code. I list the steps we tried and
hope VPP folks can help us work around this issue.
Steps:
1. install Ubuntu 16.04 on OD1K
$>> uname -a
Linux OD1K 4.4.0-92-generic #115-Ubuntu SMP Thu Aug 10 09:10:33 UTC 2017
aarch64 aarch64 aarch64 GNU/Linux
2. git clone VPP 17.04 and build VPP
## Error:
make[2]: Entering directory '/home/huawei/GIT/vpp.1704/dpdk'
cat: '/sys/bus/pci/devices/0000:00:01.0/uevent': No such file or directory
**Work around to bypass MakeFile:
##############################################################################
# Cavium ThunderX
##############################################################################
#else ifneq (,$(findstring thunder,$(shell cat
/sys/bus/pci/devices/0000:00:01.0/uevent | grep cavium)))
else
export CROSS=""
DPDK_TARGET ?= arm64-thunderx-linuxapp-$(DPDK_CC)
DPDK_MACHINE ?= thunderx
DPDK_TUNE ?= generic
3. Then, make build and failed following:
/home/huawei/GIT/vpp.1704/build-data/../src/plugins/dpdk/device/node.c:276:9:
error: `u8x32' undeclared (first use in this function)
*(u8x32 *) (((u8 *) d0) + i * 32) =
** Check vppinfra/vppinfra/vector.h and don't find u8x32 with "aarch64"
#if defined (__aarch64__) || defined (__arm__)
typedef unsigned int u32x4 _vector_size (16);
typedef u8 u8x16 _vector_size (16);
typedef u16 u16x8 _vector_size (16);
typedef u32 u32x4 _vector_size (16);
typedef u64 u64x2 _vector_size (16);
#endif
4. According https://wiki.fd.io/view/VPP/Alternative_builds
The VPP seems to support arm32 only .
export PLATFORM=arm32
*Questions:
Did I miss some steps or should include other header files that defines u8x32?
Thanks,
George
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