netdev - Re: [RFC 0/4] pktgen patches

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] [day] [month] [year] [list]

Date:	Wed, 26 Aug 2009 08:54:33 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Stephen Hemminger <shemminger@...tta.com>
CC:	David Miller <davem@...emloft.net>,
	Robert Olsson <Robert.Olsson@...a.slu.se>,
	netdev@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [RFC 0/4] pktgen patches

Stephen Hemminger a écrit :
> These are some experimental (not ready yet), patches to try and
> improve the pktgen timer code. Need some review by the hrtimer folks
> as well.
> 
> 

I'll try these in a couple of hours thanks.

As a followup on our other pktgen thread, if I switch my 3GHz cpu to 2GHz (powersave cpufreq),
then I get litle bit better pktgen throughput from my 1Gb/s tg3 link.

So getting pktgen looping faster (spending less time in kernel time services)
might actually slow down the trafic.

We might try to avoid any memory ops while waiting txq to become available,
and cpu_relax()/ndelay(500)/udelay(1) as much as possible, to free bus bandwidth ?

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html