Hi Raja,
As I updated last week, I am no longer getting this error (after I switched
from trunk to 3.2 and back to trunk) now for some unknown reason. Now when I
start the contrail-dpdk binary, I get following error—
contrail@contrail-23:~/dev/contrail-installer$ /usr/bin/contrail-vrouter-dpdk
--no-daemon --socket-mem 1024,1024
ERROR: this system does not support “SSE4_2”.
Please check that RTE_MACHINE is set correctly.
After debugging the root-cause of above issue, I found that in file
“third_party/dpdk/mk/machine/native/rte.vars.mk”, following check (marked in
red) is missing. I came to this conclusion because—
1. On my setup, compiler doesn’t report SSE4_2 support
a. checked with command “gcc -march=native -dM -E - < /dev/null | grep
SSE4_2”
2. File “/var/run/dmesg.boot” is not present
Based on above points and following code, “MACHINE_CFLAGS” will get set to
“-march=corei7”
# on FreeBSD systems, sometimes the correct cputype is not picked up.
# To get everything to compile, we need SSE4.2 support, so check if that is
# reported by compiler. If not, check if the CPU actually supports it, and if
# so, set the compilation target to be a corei7, minimum target with SSE4.2
SSE42_SUPPORT=$(shell $(CC) -march=native -dM -E - < /dev/null | grep SSE4_2)
ifeq ($(SSE42_SUPPORT),)
CPU_SSE42_SUPPORT=$(shell if [ -f /var/run/dmesg.boot ] ; then grep SSE4\.2
/var/run/dmesg.boot ; fi)
ifneq ($(CPU_SSE42_SUPPORT),)
MACHINE_CFLAGS= -march=corei7
endif
endif
Ref: http://dpdk.org/ml/archives/dev/2014-July/004053.html
So I added above additional code as highlighted in RED. Recompiled DPDK library
as well as contrail-vrouter-dpdk binary and tried to run it. However still same
error is received
Br, Deepak
From: Rajagopalan Sivaramakrishnan [mailto:[email protected]]
Sent: 08 April 2017 05:29
To: Deepak Tiwari <[email protected]>; [email protected]
Subject: Re: [opencontrail-dev] Need help in setting up vRouter in DPDK-enabled
mode
Hi Deepak,
It might be worth hardcoding core_mask_count just to see if the issue is
with using __builtin_popcountll
in the gcc version you are using. Do you still see the crash without the call
to __builtin_popcountll?
Raja
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