+ @Richardson, Bruce  @Ananyev, Konstantin

On Fri, Oct 30, 2020 at 8:55 PM McDaniel, Timothy
[off-list ref] wrote:

quoted

-----Original Message-----
From: Jerin Jacob <redacted>
Sent: Friday, October 30, 2020 9:22 AM
To: McDaniel, Timothy <redacted>
Cc: dpdk-dev <redacted>; Carrillo, Erik G <redacted>; Eads,
Gage [off-list ref]; Van Haaren, Harry
[off-list ref]; Jerin Jacob [off-list ref]; Thomas
Monjalon [off-list ref]
Subject: Re: [dpdk-dev] [PATCH v5 00/23] Add DLB2 PMD

On Fri, Oct 30, 2020 at 3:19 PM Timothy McDaniel
[off-list ref] wrote:

quoted

Timothy McDaniel (23):
  event/dlb2: add documentation and meson build infrastructure
  event/dlb2: add dynamic logging
  event/dlb2: add private data structures and constants
  event/dlb2: add definitions shared with LKM or shared code
  event/dlb2: add inline functions
  event/dlb2: add eventdev probe

There is build error with clang  and static build here.
Please send the next version with fix.

meson  -Dexamples=l3fwd --buildtype=debugoptimized --werror
--default-library=static /export/dpdk-next-eventdev/devtools/..
./build-clang-static
The Meson build system
Version: 0.55.3
Source dir: /export/dpdk-next-eventdev
Build dir: /export/dpdk-next-eventdev/build-clang-static
Build type: native build
Program cat found: YES
Using 'PKG_CONFIG_PATH' from environment with value: ''
Using 'PKG_CONFIG_PATH' from environment with value: ''
Project name: DPDK
Project version: 20.11.0-rc1
Using 'CC' from environment with value: 'ccache clang'
Using 'CFLAGS' from environment with value: ''
Using 'LDFLAGS' from environment with value: ''
Using 'CPPFLAGS' from environment with value: ''
Using 'CC' from environment with value: 'ccache clang'
Using 'CFLAGS' from environment with value: ''
Using 'LDFLAGS' from environment with value: ''
Using 'CPPFLAGS' from environment with value: ''
C compiler for the host machine: ccache clang (clang 10.0.1 "clang
version 10.0.1 ")
C linker for the host machine: clang ld.bfd 2.35.1
Host machine cpu family: x86_64
Host machine cpu: x86_64
Program pkg-config found: YES
Program gen-pmdinfo-cfile.sh found: YES
Program list-dir-globs.py found: YES
Program check-symbols.sh found: YES
Program options-ibverbs-static.sh found: YES
Program binutils-avx512-check.sh found: YES
Program python3 found: YES (/usr/bin/python)



ccache clang -Idrivers/libtmp_rte_event_dlb2.a.p -Idrivers
-I../drivers -Idrivers/event/dlb2 -I../drivers/event/dlb2
-Ilib/librte_eventdev -I../lib/librte_eventdev -I. -I.. -Iconfig
-I../config -Ilib/librte_eal/include -I../lib/librte_eal/i
nclude -Ilib/librte_eal/linux/include
-I../lib/librte_eal/linux/include -Ilib/librte_eal/x86/include
-I../lib/librte_eal/x86/include -Ilib/librte_eal/common
-I../lib/librte_eal/common -Ilib/librte_eal -I../lib/librte_eal
-Ilib/librte_kvargs
 -I../lib/librte_kvargs -Ilib/librte_metrics -I../lib/librte_metrics
-Ilib/librte_telemetry -I../lib/librte_telemetry -Ilib/librte_ring
-I../lib/librte_ring -Ilib/librte_ethdev -I../lib/librte_ethdev
-Ilib/librte_net -I../lib/librte_net -Il
ib/librte_mbuf -I../lib/librte_mbuf -Ilib/librte_mempool
-I../lib/librte_mempool -Ilib/librte_meter -I../lib/librte_meter
-Ilib/librte_hash -I../lib/librte_hash -Ilib/librte_rcu
-I../lib/librte_rcu -Ilib/librte_timer -I../lib/librte_timer -
Ilib/librte_cryptodev -I../lib/librte_cryptodev -Ilib/librte_pci
-I../lib/librte_pci -Idrivers/bus/pci -I../drivers/bus/pci
-I../drivers/bus/pci/linux -Xclang -fcolor-diagnostics -pipe
-D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Werror -O2
-g -include rte_config.h -Wextra -Wcast-qual -Wdeprecated
-Wformat-nonliteral -Wformat-security -Wmissing-declarations
-Wmissing-prototypes -Wnested-externs -Wold-style-definition
-Wpointer-arith -Wsign-compare -Wstrict-prototypes -Wundef -
Wwrite-strings -Wno-address-of-packed-member
-Wno-missing-field-initializers -D_GNU_SOURCE -fPIC -march=native
-DALLOW_EXPERIMENTAL_API -DALLOW_INTERNAL_API -MD -MQ
drivers/libtmp_rte_event_dlb2.a.p/event_dlb2_pf_dlb2_main.c.o -MF
drivers/l
ibtmp_rte_event_dlb2.a.p/event_dlb2_pf_dlb2_main.c.o.d -o
drivers/libtmp_rte_event_dlb2.a.p/event_dlb2_pf_dlb2_main.c.o -c
../drivers/event/dlb2/pf/dlb2_main.c
In file included from ../drivers/event/dlb2/pf/dlb2_main.c:22:
../drivers/event/dlb2/pf/../dlb2_inline_fns.h:41:2: error: use of
unknown builtin '__builtin_ia32_movntdq'
[-Wimplicit-function-declaration]
        __builtin_ia32_movntdq((__v2di *)pp_addr, (__v2di)src_data0);
        ^
../drivers/event/dlb2/pf/../dlb2_inline_fns.h:41:2: note: did you mean
'__builtin_ia32_movntq'?
/usr/lib/clang/10.0.1/include/xmmintrin.h:2122:3: note:
'__builtin_ia32_movntq' declared here
  __builtin_ia32_movntq(__p, __a);

  [2010/2491] Compiling C object
drivers/libtmp_rte_event_dlb2.a.p/event_dlb2_pf_dlb2_pf.c.o
FAILED: drivers/libtmp_rte_event_dlb2.a.p/event_dlb2_pf_dlb2_pf.c.o
ccache clang -Idrivers/libtmp_rte_event_dlb2.a.p -Idrivers
-I../drivers -Idrivers/event/dlb2 -I../drivers/event/dlb2
-Ilib/librte_eventdev -I../lib/librte_eventdev -I. -I.. -Iconfig
-I../config -Ilib/librte_eal/include -I../lib/librte_eal/i
nclude -Ilib/librte_eal/linux/include
-I../lib/librte_eal/linux/include -Ilib/librte_eal/x86/include
-I../lib/librte_eal/x86/include -Ilib/librte_eal/common
-I../lib/librte_eal/common -Ilib/librte_eal -I../lib/librte_eal
-Ilib/librte_kvargs
 -I../lib/librte_kvargs -Ilib/librte_metrics -I../lib/librte_metrics
-Ilib/librte_telemetry -I../lib/librte_telemetry -Ilib/librte_ring
-I../lib/librte_ring -Ilib/librte_ethdev -I../lib/librte_ethdev
-Ilib/librte_net -I../lib/librte_net -Il
ib/librte_mbuf -I../lib/librte_mbuf -Ilib/librte_mempool
-I../lib/librte_mempool -Ilib/librte_meter -I../lib/librte_meter
-Ilib/librte_hash -I../lib/librte_hash -Ilib/librte_rcu
-I../lib/librte_rcu -Ilib/librte_timer -I../lib/librte_timer -
Ilib/librte_cryptodev -I../lib/librte_cryptodev -Ilib/librte_pci
-I../lib/librte_pci -Idrivers/bus/pci -I../drivers/bus/pci
-I../drivers/bus/pci/linux -Xclang -fcolor-diagnostics -pipe
-D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Werror -O2
-g -include rte_config.h -Wextra -Wcast-qual -Wdeprecated
-Wformat-nonliteral -Wformat-security -Wmissing-declarations
-Wmissing-prototypes -Wnested-externs -Wold-style-definition
-Wpointer-arith -Wsign-compare -Wstrict-prototypes -Wundef -
Wwrite-strings -Wno-address-of-packed-member
-Wno-missing-field-initializers -D_GNU_SOURCE -fPIC -march=native
-DALLOW_EXPERIMENTAL_API -DALLOW_INTERNAL_API -MD -MQ
drivers/libtmp_rte_event_dlb2.a.p/event_dlb2_pf_dlb2_pf.c.o -MF
drivers/lib
tmp_rte_event_dlb2.a.p/event_dlb2_pf_dlb2_pf.c.o.d -o
drivers/libtmp_rte_event_dlb2.a.p/event_dlb2_pf_dlb2_pf.c.o -c
../drivers/event/dlb2/pf/dlb2_pf.c
In file included from ../drivers/event/dlb2/pf/dlb2_pf.c:35:
../drivers/event/dlb2/pf/../dlb2_inline_fns.h:41:2: error: use of
unknown builtin '__builtin_ia32_movntdq'
[-Wimplicit-function-declaration]
        __builtin_ia32_movntdq((__v2di *)pp_addr, (__v2di)src_data0);

Not sure why this builds for me, but I do not see this error.

May be you can try with
[for-main][dpdk-next-eventdev] $ clang -v
clang version 10.0.1
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

According to information online, '__builtin_ia32_movntdq' should be available if -msse2 is set.
According to the following snippet from config/x86/meson.build, it looks like msse4 is defined.
<snippet>
# we require SSE4.2 for DPDK
if cc.get_define('__SSE4_2__', args: machine_args) == ''
        message('SSE 4.2 not enabled by default, explicitly enabling')
        machine_args += '-msse4'
endif
<end snippet>

I realize this is from clang, not gcc, but why are they out of sync?
such that __builtin_ia32_movntdq is not available in clang, but is available in gcc.

Should I convert to _mm_stream_si128 (__m128i *__A, __m128i __B) ?

Any guidance on how to get past this would be greatly appreciated.

Added @Richardson, Bruce  @Ananyev, Konstantin

I do see the same problem in DLB driver as well.

Thanks,
Tim