From: Denys Vlasenko <dvlasenk@redhat.com>
To: Antonio Quartulli <a@unstable.cc>
Cc: linux-kernel@vger.kernel.org, b.a.t.m.a.n@lists.open-mesh.org,
Marek Lindner <mareklindner@neomailbox.ch>
Subject: Re: [B.A.T.M.A.N.] [PATCH] batman-adv: Deinline batadv_orig_hash_find, save 9024 bytes
Date: Mon, 25 Apr 2016 15:45:20 +0200 [thread overview]
Message-ID: <571E1F70.3040001@redhat.com> (raw)
In-Reply-To: <20160425133950.GH3381@prodigo>
On 04/25/2016 03:39 PM, Antonio Quartulli wrote:
> On Mon, Apr 25, 2016 at 03:25:22PM +0200, Denys Vlasenko wrote:
>> This function compiles to 473 bytes of machine code.
>> 21 callsites.
>>
>> text data bss dec hex filename
>> 95903266 20860288 35991552 152755106 91adba2 vmlinux_before
>> 95894242 20860288 35991552 152746082 91ab862 vmlinux
>
> Hi Danys,
>
> thanks for your patch. This function is used in a several performance critical
> code paths (i.e. packet forwarding).
>
> Are we sure we are not losing in performance here?
Is this a common case?
if (!hash)
return NULL;
If yes, then we can inline this part only.
WARNING: multiple messages have this Message-ID (diff)
From: Denys Vlasenko <dvlasenk@redhat.com>
To: Antonio Quartulli <a@unstable.cc>
Cc: Marek Lindner <mareklindner@neomailbox.ch>,
Simon Wunderlich <sw@simonwunderlich.de>,
Sven Eckelmann <sven@narfation.org>,
b.a.t.m.a.n@lists.open-mesh.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] batman-adv: Deinline batadv_orig_hash_find, save 9024 bytes
Date: Mon, 25 Apr 2016 15:45:20 +0200 [thread overview]
Message-ID: <571E1F70.3040001@redhat.com> (raw)
In-Reply-To: <20160425133950.GH3381@prodigo>
On 04/25/2016 03:39 PM, Antonio Quartulli wrote:
> On Mon, Apr 25, 2016 at 03:25:22PM +0200, Denys Vlasenko wrote:
>> This function compiles to 473 bytes of machine code.
>> 21 callsites.
>>
>> text data bss dec hex filename
>> 95903266 20860288 35991552 152755106 91adba2 vmlinux_before
>> 95894242 20860288 35991552 152746082 91ab862 vmlinux
>
> Hi Danys,
>
> thanks for your patch. This function is used in a several performance critical
> code paths (i.e. packet forwarding).
>
> Are we sure we are not losing in performance here?
Is this a common case?
if (!hash)
return NULL;
If yes, then we can inline this part only.
next prev parent reply other threads:[~2016-04-25 13:45 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-25 13:25 [B.A.T.M.A.N.] [PATCH] batman-adv: Deinline batadv_orig_hash_find, save 9024 bytes Denys Vlasenko
2016-04-25 13:25 ` Denys Vlasenko
2016-04-25 13:39 ` [B.A.T.M.A.N.] " Antonio Quartulli
2016-04-25 13:39 ` Antonio Quartulli
2016-04-25 13:45 ` Denys Vlasenko [this message]
2016-04-25 13:45 ` Denys Vlasenko
2016-04-25 14:19 ` [B.A.T.M.A.N.] " Antonio Quartulli
2016-04-25 14:19 ` Antonio Quartulli
2017-10-23 16:41 ` [B.A.T.M.A.N.] " Sven Eckelmann
2017-10-23 16:41 ` Sven Eckelmann
2016-04-29 21:15 ` [B.A.T.M.A.N.] " Sven Eckelmann
2016-04-29 21:15 ` Sven Eckelmann
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