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dpif-netdev: Call cpuid for x86 isa availability.

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DPIF AVX512 optimizations currently rely on DPDK availability while
they can be used without DPDK.
Besides, checking for availability of some isa only has to be done once
and won't change while a OVS process runs.

Resolve isa availability in constructors by using a simplified query
based on cpuid API that comes from the compiler.

Note: this also fixes the check on BMI2 availability: DPDK had a bug
for this isa, see https://git.dpdk.org/dpdk/commit/?id=aae3037ab1e0.

Suggested-by: Ilya Maximets <i.maximets@ovn.org>
Signed-off-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
This commit is contained in:
David Marchand
2021-12-15 17:35:33 +01:00
committed by Ilya Maximets
parent 11441385c2
commit b366fa2f49
9 changed files with 119 additions and 74 deletions
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9
lib/dpdk-stub.c
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@@ -79,15 +79,6 @@ print_dpdk_version(void)
{
}
bool
dpdk_get_cpu_has_isa(const char *arch OVS_UNUSED,
const char *feature OVS_UNUSED)
{
VLOG_DBG_ONCE("DPDK not supported in this version of Open vSwitch, "
"cannot use CPU flag based optimizations");
return false;
}
void
dpdk_status(const struct ovsrec_open_vswitch *cfg)
{