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From: Neil Horman <nhorman@tuxdriver.com>
To: dev@dpdk.org
Subject: [dpdk-dev] [PATCH 0/2] dpdk: Allow for dynamic enablement of some isolated features
Date: Tue, 29 Jul 2014 16:24:24 -0400	[thread overview]
Message-ID: <1406665466-29654-1-git-send-email-nhorman@tuxdriver.com> (raw)

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.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: Thomas Monjalon <thomas.monjalon@6wind.com>

             reply	other threads:[~2014-07-29 20:22 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-07-29 20:24 Neil Horman [this message]
2014-07-29 20:24 ` [dpdk-dev] [PATCH 1/2] ixgbe: test sse4.2 support at runtime for vectorized receive operations Neil Horman
2014-07-29 20:24 ` [dpdk-dev] [PATCH 2/2] acl: Preform dynamic sse4.2 support check Neil Horman
2014-07-30 12:07 ` [dpdk-dev] [PATCH 0/2] dpdk: Allow for dynamic enablement of some isolated features Ananyev, Konstantin
2014-07-30 13:01   ` Neil Horman
2014-07-30 13:44     ` Ananyev, Konstantin
2014-07-30 14:49 ` [dpdk-dev] [PATCH v2 " Neil Horman
2014-07-30 14:49   ` [dpdk-dev] [PATCH v2 1/2] ixgbe: test sse4.2 support at runtime for vectorized receive operations Neil Horman
2014-07-30 14:49   ` [dpdk-dev] [PATCH v2 2/2] acl: Preform dynamic sse4.2 support check Neil Horman
2014-07-30 15:36   ` [dpdk-dev] [PATCH v2 0/2] dpdk: Allow for dynamic enablement of some isolated features Ananyev, Konstantin
2014-07-30 19:03   ` Venky Venkatesan
2014-07-30 19:17     ` Neil Horman
2014-07-30 19:34     ` Neil Horman
2014-07-30 18:59 ` [dpdk-dev] [PATCH " Bruce Richardson
2014-07-30 19:28   ` Neil Horman
2014-07-30 21:09     ` Bruce Richardson
2014-07-31  9:30       ` Thomas Monjalon
2014-07-31 11:36       ` Ananyev, Konstantin
2014-07-31 13:13       ` Neil Horman
2014-07-31 13:26         ` Thomas Monjalon
2014-07-31 14:32           ` Neil Horman
2014-07-31 18:10             ` Neil Horman
2014-07-31 18:36               ` Bruce Richardson
2014-07-31 19:01                 ` Neil Horman
2014-07-31 20:19                   ` Bruce Richardson
2014-08-01 13:36                     ` Neil Horman
2014-08-01 13:56                       ` Ananyev, Konstantin
2014-08-01 14:26                         ` Venkatesan, Venky
2014-08-01 14:27                         ` Neil Horman
2014-07-31 19:58                 ` John W. Linville
2014-07-31 20:20                   ` Bruce Richardson
2014-07-31 20:32                     ` John W. Linville
2014-08-01  8:46                       ` Vincent JARDIN
2014-08-01 14:06                         ` Neil Horman
2014-08-01 14:57                           ` Vincent JARDIN
2014-08-01 15:19                             ` Neil Horman
2014-07-31 20:10                 ` Neil Horman
2014-07-31 20:25                   ` Bruce Richardson
2014-08-01 15:06                     ` Neil Horman
2014-08-01 19:22                       ` Bruce Richardson
2014-08-01 20:43                         ` Neil Horman
2014-08-01 21:08                           ` Bruce Richardson
2014-08-02 12:56                             ` Neil Horman
2014-07-31 21:53               ` Thomas Monjalon
2014-07-31 21:25             ` Thomas Monjalon

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