> -----Original Message----- > From: Neil Horman [mailto:nhorman at tuxdriver.com] > Sent: Wednesday, July 30, 2014 3:49 PM > To: dev at dpdk.org > Cc: Ananyev, Konstantin; Neil Horman; Thomas Monjalon > Subject: [PATCH v2 0/2] dpdk: Allow for dynamic enablement of some isolated > features > > Hey all- > I've been trying to update the fedora dpdk package to support VFIO > enabled drivers and ran into a problem in which ixgbe didn't compile because > the > rxtx_vec code uses sse4.2 instruction intrinsics, which aren't supported in > the > default config I have. I tried to remedy this by replacing the intrinsics > with > the __builtin macros, but it was pointed out (correctly), that this doesn't > work > properly. So this is my second attempt, which I actually like a bit better. > I > noted that code that uses intrinsics (ixgbe and the acl library), don't need > to > have those instructions turned on build-wide. Rather, we can just enable the > instructions in the specific code we want to build with support for that, and > test for instruction support dynamically at run time. This allows me to build > the dpdk for a generic platform, but in such a way that some optimizations can > be used if the executing cpu supports them at run time. > > Change notes: > > v2) > * Added Log messages to run time check failures per Konstantin > * Removed run time check caching in acl per Konstantin > > Signed-off-by: Neil Horman <nhorman at tuxdriver.com> > CC: Thomas Monjalon <thomas.monjalon at 6wind.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev at intel.com>
