netdev - Re: [RFC] gianfar: low gigabit throughput

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:	Tue, 6 May 2008 15:29:06 -0500
From:	Andy Fleming <afleming@...escale.com>
To:	Rick Jones <rick.jones2@...com>
Cc:	avorontsov@...mvista.com, netdev@...r.kernel.org,
	linuxppc-dev@...abs.org
Subject: Re: [RFC] gianfar: low gigabit throughput

>>
>> I've tried to tune gianfar driver in various ways... and it gave
>> some positive results with this patch:
>> diff --git a/drivers/net/gianfar.h b/drivers/net/gianfar.h
>> index fd487be..b5943f9 100644
>> --- a/drivers/net/gianfar.h
>> +++ b/drivers/net/gianfar.h
>> @@ -123,8 +123,8 @@ extern const char gfar_driver_version[];
>> #define GFAR_10_TIME    25600
>>  #define DEFAULT_TX_COALESCE 1
>> -#define DEFAULT_TXCOUNT	16
>> -#define DEFAULT_TXTIME	21
>> +#define DEFAULT_TXCOUNT	80
>> +#define DEFAULT_TXTIME	105
>>  #define DEFAULT_RXTIME	21
>
> No ethtool coalescing tuning support for gianfar?-)

Yeah, there's coalescing tuning in gianfar.

Anton, those numbers aren't too surprising on a 400 MHz machine, I  
think.  But I'd be happy to see any analysis on performance  
bottlenecks in the driver.  And patches to fix those bottlenecks are  
even better!  :)

Andy
--
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