| To: | raghavendra.koushik@xxxxxxxxxxxx |
|---|---|
| Subject: | Re: [PATCH 2.6.12.1 5/12] S2io: Performance improvements |
| From: | Christoph Hellwig <hch@xxxxxxxxxxxxx> |
| Date: | Tue, 12 Jul 2005 21:27:54 +0100 |
| Cc: | jgarzik@xxxxxxxxx, netdev@xxxxxxxxxxx, ravinandan.arakali@xxxxxxxxxxxx, leonid.grossman@xxxxxxxxxxxx, rapuru.sriram@xxxxxxxxxxxx |
| In-reply-to: | <20050707222741.71C3E89826@linux.site> |
| References: | <20050707222741.71C3E89826@linux.site> |
| Sender: | netdev-bounce@xxxxxxxxxxx |
| User-agent: | Mutt/1.4.2.1i |
> 3. Enable two-buffer mode(for Rx path) automatically for SGI > systems. This improves Rx performance dramatically on > SGI systems. > +/* Enable 2 buffer mode by default for SGI system */ > +#ifdef CONFIG_IA64_SGI_SN2 > +#define CONFIG_2BUFF_MODE > +#endif this enabled it only on kernel that are built to only run on SN2 hardware, which is completely useless in practice. Besides that defining a CONFIG_ symbol from source files is a big no-go. What exactly is the 2buff mode, and more specific what are the downsides of enabling it on non-SGI hardware? |
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