linux-kernel - Re: [PATCH net-next] hv_netvsc: don't make assumptions on struct flow

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 13 Jan 2016 23:56:43 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	haiyangz@...rosoft.com
Cc:	vkuznets@...hat.com, netdev@...r.kernel.org, kys@...rosoft.com,
	devel@...uxdriverproject.org, linux-kernel@...r.kernel.org,
	eric.dumazet@...il.com
Subject: Re: [PATCH net-next] hv_netvsc: don't make assumptions on struct
 flow_keys layout

From: Haiyang Zhang <haiyangz@...rosoft.com>
Date: Wed, 13 Jan 2016 23:10:57 +0000

> I have done a comparison of the Toeplitz v.s. Jenkins Hash algorithms, 
> and found that the Toeplitz provides much better distribution of the 
> connections into send-indirection-table entries.

This fails to take into consideration how massively more expensive
Toeplitz is to compute.

This also fails to show what the real life performance implications
are.

Just showing distributions is meaningless if it doesn't indicate
what kind of performance distrubtion A or B achieves.