MP-ify patch for ena(4)

KUSABA Takeshi <[email protected]> Mon, 23 Oct 2023 19:31:53 +0900

Newsgroups	gmane.os.netbsd.devel.network
Message-ID	<[email protected]>

Hi,

I made some patches for ena(4): NIC for AWS EC2.
This patch fixes some bugs and MP-ifies ena(4) including RSS.

Patch: https://github.com/maleic1618/NetBSD/pull/1/commits

On t3.small instance, its forwarding throughput has grown as followings:

|                | 64 bytes | 256 bytes |
| -current 1flow | 21.58    | 110.51    |
| -current 8flow | 28.27    | 123.19    |
| patched  1flow | 37.20    | 142.21    |
| patched  8flow | 92.26    | 366.85    |

(Unit: Mbps, NET_MPSAFE enabled, Using https://github.com/iij/ipgen)

It also worked well on a aarch64 machine.

Could you comment on this patch?

Thanks,

-- 
Internet Initiative Japan Inc.

Network Division
Core Product Development Department
Device Engineering Section

KUSABA Takeshi <[email protected]>