From: "H. Peter Anvin" <hpa@zytor.com>
To: David Miller <davem@davemloft.net>
Cc: bhutchings@solarflare.com, eliezer.tamir@linux.jf.intel.com,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
jesse.brandeburg@intel.com, e1000-devel@lists.sourceforge.net,
willemb@google.com, andi@firstfloor.org, eliezer@tamir.org.il
Subject: Re: [RFC PATCH 1/5] net: implement support for low latency socket polling
Date: Tue, 05 Mar 2013 12:03:02 -0800 [thread overview]
Message-ID: <51364F76.4060107@zytor.com> (raw)
In-Reply-To: <20130305.145524.1486936679665458305.davem@davemloft.net>
On 03/05/2013 11:55 AM, David Miller wrote:
> From: Ben Hutchings <bhutchings@solarflare.com>
> Date: Tue, 5 Mar 2013 16:43:01 +0000
>
>> In general it appears to require a run-time check. You might need to
>> augment <asm/timex.h>.
>
> On the other hand, unlike get_cycles, sched_clock() is always available.
>
On the gripping hand, we need to know when it uses something like
jiffies, in which case we probably need to disable the whole interface.
-hpa
WARNING: multiple messages have this Message-ID (diff)
From: "H. Peter Anvin" <hpa@zytor.com>
To: David Miller <davem@davemloft.net>
Cc: eliezer.tamir@linux.jf.intel.com, willemb@google.com,
e1000-devel@lists.sourceforge.net, netdev@vger.kernel.org,
jesse.brandeburg@intel.com, linux-kernel@vger.kernel.org,
andi@firstfloor.org, bhutchings@solarflare.com,
eliezer@tamir.org.il
Subject: Re: [RFC PATCH 1/5] net: implement support for low latency socket polling
Date: Tue, 05 Mar 2013 12:03:02 -0800 [thread overview]
Message-ID: <51364F76.4060107@zytor.com> (raw)
In-Reply-To: <20130305.145524.1486936679665458305.davem@davemloft.net>
On 03/05/2013 11:55 AM, David Miller wrote:
> From: Ben Hutchings <bhutchings@solarflare.com>
> Date: Tue, 5 Mar 2013 16:43:01 +0000
>
>> In general it appears to require a run-time check. You might need to
>> augment <asm/timex.h>.
>
> On the other hand, unlike get_cycles, sched_clock() is always available.
>
On the gripping hand, we need to know when it uses something like
jiffies, in which case we probably need to disable the whole interface.
-hpa
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next prev parent reply other threads:[~2013-03-05 20:03 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-27 17:55 [RFC PATCH 0/5] net: low latency Ethernet device polling Eliezer Tamir
2013-02-27 17:55 ` [RFC PATCH 1/5] net: implement support for low latency socket polling Eliezer Tamir
2013-03-03 18:35 ` Eric Dumazet
2013-03-03 19:21 ` Andi Kleen
2013-03-03 21:20 ` Eric Dumazet
2013-03-04 3:55 ` Andi Kleen
2013-03-04 8:43 ` Eliezer Tamir
2013-03-04 14:52 ` Eric Dumazet
2013-03-04 15:28 ` Eliezer Tamir
2013-03-04 16:15 ` Eric Dumazet
2013-03-04 7:23 ` Cong Wang
2013-03-05 16:43 ` Ben Hutchings
2013-03-05 16:43 ` Ben Hutchings
2013-03-05 17:15 ` Eliezer Tamir
2013-03-05 19:57 ` David Miller
2013-03-05 19:55 ` David Miller
2013-03-05 20:03 ` H. Peter Anvin [this message]
2013-03-05 20:03 ` H. Peter Anvin
2013-02-27 17:56 ` [RFC PATCH 2/5] tcp: add TCP support for low latency receive poll Eliezer Tamir
2013-03-05 17:13 ` Ben Hutchings
2013-03-05 17:13 ` Ben Hutchings
2013-02-27 17:56 ` [RFC PATCH 3/5] ixgbe: Add support for ndo_ll_poll Eliezer Tamir
2013-02-27 18:41 ` Eric Dumazet
2013-02-27 19:20 ` Eliezer Tamir
2013-03-05 17:26 ` Ben Hutchings
2013-03-05 17:26 ` Ben Hutchings
2013-03-05 17:28 ` Ben Hutchings
2013-03-05 17:28 ` Ben Hutchings
2013-03-05 17:36 ` Eric Dumazet
2013-03-05 17:36 ` Eric Dumazet
2013-02-27 17:56 ` [RFC PATCH 4/5] ixgbe: add extra stats " Eliezer Tamir
2013-02-27 17:56 ` [RFC PATCH 5/5] ixgbe: kprobes latency test module Eliezer Tamir
2013-02-27 18:07 ` [RFC PATCH 0/5] net: low latency Ethernet device polling Eliezer Tamir
2013-02-27 18:07 ` Eliezer Tamir
2013-02-27 18:13 ` Stephen Hemminger
2013-02-27 18:47 ` Tom Herbert
2013-02-27 19:17 ` Eliezer Tamir
2013-03-04 22:34 ` Ben Hutchings
2013-02-27 19:58 ` Rick Jones
2013-02-27 20:40 ` Eliezer Tamir
2013-02-27 21:42 ` Ben Greear
2013-02-28 8:38 ` Eliezer Tamir
2013-03-01 21:24 ` David Miller
2013-03-01 22:57 ` Tom Herbert
2013-03-02 17:02 ` Eliezer Tamir
2013-03-04 7:37 ` Cong Wang
2013-03-04 7:37 ` Cong Wang
2013-03-04 8:19 ` Eliezer Tamir
2013-03-04 8:46 ` Eliezer Tamir
2013-03-04 17:19 ` Stephen Hemminger
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