From: Ferruh Yigit <ferruh.yigit@intel.com>
To: zhuangyan <zhuangyan@bytedance.com>, dev@dpdk.org
Subject: Re: [dpdk-dev] vmovdqa64 instruction: how to be disabled in skylake CPU
Date: Wed, 2 Jan 2019 15:05:34 +0000 [thread overview]
Message-ID: <d8abe47d-3a00-0be1-3888-9dbe7244337c@intel.com> (raw)
In-Reply-To: <84917CEF-AC2A-4938-97A1-E9303A4CBA2D@bytedance.com>
On 12/23/2018 12:43 PM, zhuangyan wrote:
> Hello,
>
> Is there any way to disable the generation of “vmovdqa64” instruction during the compilation of dpdk library on Intel Skylake CPU?
>
> My dev VM uses Intel Skylake CPU while my test machine uses Intel uses Intel(R) Xeon(R) CPU E5-2630 v4 that is some sort of Intel Broadwell CPU.
>
> And my generated executable file of dpdk application contains "vmovdqa64" instruction that is NOT supported in Intel Broadwell CPU so my dpdk application fails to be run.
>
> I tried MACHINE_CFLAGS= -march=native/broadwell/ivybridge within dpdk-stable-17.11.2/mk/machine/native/rte.vars.mk, however it does not work.
>
> Additionally, my gcc version is gcc (Debian 4.9.2-10+deb8u1) 4.9.2.
In config file, it is possible to select machine type, via "CONFIG_RTE_MACHINE="
config option.
If it is "native", it will use all available CPU features host machine supports.
For portability there is also "default" machine type, which will build for
"corei7", this should work for your case.
You can check available machine types at: 'mk/machine/*'
prev parent reply other threads:[~2019-01-02 15:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-23 12:43 zhuangyan
2019-01-02 15:05 ` Ferruh Yigit [this message]
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