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From: Eliezer Tamir <eliezer.tamir@linux.intel.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David Miller <davem@davemloft.net>,
	linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	Jesse Brandeburg <jesse.brandeburg@intel.com>,
	Don Skidmore <donald.c.skidmore@intel.com>,
	e1000-devel@lists.sourceforge.net,
	Willem de Bruijn <willemb@google.com>,
	Ben Hutchings <bhutchings@solarflare.com>,
	Andi Kleen <andi@firstfloor.org>, HPA <hpa@zytor.com>,
	Eilon Greenstien <eilong@broadcom.com>,
	Or Gerlitz <or.gerlitz@gmail.com>,
	Amir Vadai <amirv@mellanox.com>,
	Eliezer Tamir <eliezer@tamir.org.il>
Subject: Re: [PATCH net-next 2/2] net:add socket option for low latency polling
Date: Tue, 11 Jun 2013 18:37:29 +0300	[thread overview]
Message-ID: <51B74439.3030203@linux.intel.com> (raw)
In-Reply-To: <1370961930.3252.32.camel@edumazet-glaptop>

On 11/06/2013 17:45, Eric Dumazet wrote:
> On Tue, 2013-06-11 at 17:24 +0300, Eliezer Tamir wrote:
>> adds a socket option for low latency polling.
>> This allows overriding the global sysctl value with a per-socket one.
>>
>> Signed-off-by: Eliezer Tamir <eliezer.tamir@linux.intel.com>
>> ---
>>
>>
>> -static inline cycles_t ll_end_time(void)
>> +static inline cycles_t ll_end_time(struct sock *sk)
>>   {
>> -	return TSC_MHZ * ACCESS_ONCE(sysctl_net_ll_poll) + get_cycles();
>> +	return TSC_MHZ * ACCESS_ONCE(sk->sk_ll_usec) + get_cycles();
>>   }
>
> Hmm, sk_ll_usec is an unsigned int.

We changed it to an unsigned long in v7, I guess that was gratuitous.
Re-reading your comments on v6 2/5 I realize a cast would have sufficed.
Should I send a patch to revert it to an unsigned int?

Thanks,
Eliezer


WARNING: multiple messages have this Message-ID (diff)
From: Eliezer Tamir <eliezer.tamir@linux.intel.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Willem de Bruijn <willemb@google.com>,
	Or Gerlitz <or.gerlitz@gmail.com>,
	e1000-devel@lists.sourceforge.net, netdev@vger.kernel.org,
	HPA <hpa@zytor.com>, Amir Vadai <amirv@mellanox.com>,
	Jesse Brandeburg <jesse.brandeburg@intel.com>,
	Eliezer Tamir <eliezer@tamir.org.il>,
	linux-kernel@vger.kernel.org, Andi Kleen <andi@firstfloor.org>,
	Ben Hutchings <bhutchings@solarflare.com>,
	Eilon Greenstien <eilong@broadcom.com>,
	David Miller <davem@davemloft.net>
Subject: Re: [PATCH net-next 2/2] net:add socket option for low latency polling
Date: Tue, 11 Jun 2013 18:37:29 +0300	[thread overview]
Message-ID: <51B74439.3030203@linux.intel.com> (raw)
In-Reply-To: <1370961930.3252.32.camel@edumazet-glaptop>

On 11/06/2013 17:45, Eric Dumazet wrote:
> On Tue, 2013-06-11 at 17:24 +0300, Eliezer Tamir wrote:
>> adds a socket option for low latency polling.
>> This allows overriding the global sysctl value with a per-socket one.
>>
>> Signed-off-by: Eliezer Tamir <eliezer.tamir@linux.intel.com>
>> ---
>>
>>
>> -static inline cycles_t ll_end_time(void)
>> +static inline cycles_t ll_end_time(struct sock *sk)
>>   {
>> -	return TSC_MHZ * ACCESS_ONCE(sysctl_net_ll_poll) + get_cycles();
>> +	return TSC_MHZ * ACCESS_ONCE(sk->sk_ll_usec) + get_cycles();
>>   }
>
> Hmm, sk_ll_usec is an unsigned int.

We changed it to an unsigned long in v7, I guess that was gratuitous.
Re-reading your comments on v6 2/5 I realize a cast would have sufficed.
Should I send a patch to revert it to an unsigned int?

Thanks,
Eliezer


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  reply	other threads:[~2013-06-11 15:37 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-06-11 14:24 [PATCH net-next 0/2] net: low latency sockets follow ups Eliezer Tamir
2013-06-11 14:24 ` Eliezer Tamir
2013-06-11 14:24 ` [PATCH net-next 1/2] net: remove NET_LL_RX_POLL config menue Eliezer Tamir
2013-06-11 14:24   ` Eliezer Tamir
2013-06-12 22:12   ` David Miller
2013-06-13  2:01     ` Stephen Hemminger
2013-06-13  2:13       ` Eliezer Tamir
2013-06-13  2:13         ` Eliezer Tamir
2013-06-13  8:00         ` Daniel Borkmann
2013-06-13  8:00           ` Daniel Borkmann
2013-06-13 10:09           ` Eliezer Tamir
2013-06-11 14:24 ` [PATCH net-next 2/2] net:add socket option for low latency polling Eliezer Tamir
2013-06-11 14:45   ` Eric Dumazet
2013-06-11 14:45     ` Eric Dumazet
2013-06-11 15:37     ` Eliezer Tamir [this message]
2013-06-11 15:37       ` Eliezer Tamir
2013-06-11 15:58       ` Eric Dumazet
2013-06-11 15:58         ` Eric Dumazet
2013-06-11 20:24   ` Ben Hutchings
2013-06-11 20:24     ` Ben Hutchings
2013-06-12  6:39     ` Eliezer Tamir
2013-06-11 14:26 ` [PATCH] sockperf: add SO_LL socketop support Eliezer Tamir
2013-06-11 14:26   ` Eliezer Tamir
2013-06-12  8:36   ` Amir Vadai
2013-06-12  8:36     ` Amir Vadai
2013-06-12  8:45     ` Eliezer Tamir
2013-06-12  8:45       ` Eliezer Tamir

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