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dpdk: enable -mavx/-mavx2 if available

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To support HEAD version of DPDK, we need -mavx/-mavx2 on Seastar CFLAGS.
But we cannot enable it until Host CPU has the feature, so we need to check it.

Signed-off-by: Takuya ASADA <syuu@cloudius-systems.com>
This commit is contained in:
Takuya ASADA
2015-04-06 15:00:19 +09:00
committed by Avi Kivity
parent c25986ef82
commit d53a1abc7c
1 changed files with 16 additions and 1 deletions
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17
configure.py
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@@ -20,6 +20,19 @@ import os, os.path, textwrap, argparse, sys, shlex, subprocess, tempfile, re
configure_args = str.join(' ', [shlex.quote(x) for x in sys.argv[1:]])
def get_flags():
with open('/proc/cpuinfo') as f:
for line in f:
if line.strip():
if line.rstrip('\n').startswith('flags'):
return re.sub(r'^flags\s+: ', '', line).split()
def has_avx():
return 'avx' in get_flags()
def has_avx2():
return 'avx2' in get_flags()
def add_tristate(arg_parser, name, dest, help):
arg_parser.add_argument('--enable-' + name, dest = dest, action = 'store_true', default = None,
help = 'Enable ' + help)
@@ -404,7 +417,9 @@ if args.with_osv:
if args.dpdk_target:
args.user_cflags = (args.user_cflags +
' -DHAVE_DPDK -I' +
args.dpdk_target + '/include -Wno-error=literal-suffix -Wno-literal-suffix -Wno-invalid-offsetof')
args.dpdk_target + '/include -Wno-error=literal-suffix -Wno-literal-suffix -Wno-invalid-offsetof -m64' +
' -mavx' if has_avx() else '' +
' -mavx2' if has_avx2() else '')
libs += (' -L' + args.dpdk_target + '/lib ' +
'-lintel_dpdk -lrt -lm -ldl')