netdev - Re: [PATCH net-next] enic: Add support for adaptive interrupt coalescing

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:	Thu, 8 May 2014 11:43:03 +0530 (IST)
From:	Govindarajulu Varadarajan <gvaradar@...co.com>
To:	David Miller <davem@...emloft.net>
cc:	_govind@....com, netdev@...r.kernel.org, ssujith@...co.com,
	benve@...co.com, neepatel@...co.com
Subject: Re: [PATCH net-next] enic: Add support for adaptive interrupt
 coalescing

On Wed, 7 May 2014, David Miller wrote:

> From: Govindarajulu Varadarajan <_govind@....com>
> Date: Tue,  6 May 2014 19:54:22 +0530
>
>> From: Sujith Sankar <ssujith@...co.com>
>>
>> Signed-off-by: Sujith Sankar <ssujith@...co.com>
>> Signed-off-by: Govindarajulu Varadarajan <_govind@....com>
>
> Please never submit patches except absolutely the most extremely
> trivial ones without a real commit log message explaining what
> the change does, how it does it, and why you implemented it that
> way.
>

Will add more description. Sorry

>> +enum hrtimer_restart enic_hrtimer_cb(struct hrtimer *timer)
>> +{
>> +	return HRTIMER_RESTART;
>> +}
>
> For example, I have no idea why in the world you need an hrtimer whose
> function is a complete NOP if the networking hardware does the
> interrupt coalescing for you.
>

The idea was to get time delta in usec, to measure the pkt rate. We want to 
make damping of coal timer more aggressive. I guess we can use ktime_get() 
instead of hrtimers.

Will resubmit the patch with changes in a week. Let us know if anything else 
needs to be changed.

thanks
Govind
--
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