* How to disable usage of VPCLMULQDQ
@ 2022-12-23 11:15 Oleksandr Nahnybida
2022-12-23 11:57 ` Dmitry Kozlyuk
0 siblings, 1 reply; 2+ messages in thread
From: Oleksandr Nahnybida @ 2022-12-23 11:15 UTC (permalink / raw)
To: users
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Hi All,
DPDKv22.11
My build machine supports VPCLMULQDQ instruction, but the machine I run
DPDK on doesn't support it, is there a way to force the build system not to
use this instruction?
Right now, I added this line at the beginning of config/x86/meson.build:
machine_args += '-mno-vpclmulqdq'
But, it would have been nice if there was a build config to do this.
Best Regards,
Oleksandr
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: How to disable usage of VPCLMULQDQ
2022-12-23 11:15 How to disable usage of VPCLMULQDQ Oleksandr Nahnybida
@ 2022-12-23 11:57 ` Dmitry Kozlyuk
0 siblings, 0 replies; 2+ messages in thread
From: Dmitry Kozlyuk @ 2022-12-23 11:57 UTC (permalink / raw)
To: Oleksandr Nahnybida; +Cc: users
2022-12-23 13:15 (UTC+0200), Oleksandr Nahnybida:
> Hi All,
>
> DPDKv22.11
>
> My build machine supports VPCLMULQDQ instruction, but the machine I run
> DPDK on doesn't support it, is there a way to force the build system not to
> use this instruction?
>
> Right now, I added this line at the beginning of config/x86/meson.build:
> machine_args += '-mno-vpclmulqdq'
>
> But, it would have been nice if there was a build config to do this.
Hi Oleksandr,
Use -Dcpu_instruction_set=haswell (for example) suitable for your target.
Read more about -Dplatform and -Dcpu_instruction_set:
https://doc.dpdk.org/guides/linux_gsg/build_dpdk.html
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