Messages in this thread | | | Subject | RE: My vote against eepro* removal | Date | Fri, 20 Jan 2006 12:27:43 +0100 | From | "kus Kusche Klaus" <> |
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From: Evgeniy Polyakov > Just a hack: > > --- drivers/net/e100.c.1 2006-01-20 13:39:19.000000000 +0300 > +++ drivers/net/e100.c 2006-01-20 14:15:40.000000000 +0300 > @@ -879,8 +879,8 @@ > > writel((reg << 16) | (addr << 21) | dir | data, > &nic->csr->mdi_ctrl); > > - for(i = 0; i < 100; i++) { > - udelay(20); > + for(i = 0; i < 1000; i++) { > + udelay(2); > if((data_out = readl(&nic->csr->mdi_ctrl)) & mdi_ready) > break; > }
My test environment and software is not precise enough for small improvements, but I'd say this results in a 10-15 % improvement (i.e. something like 50 us shorter delay) on the average.
To be sure, one would have to take and print tsc timestamps directly in the watchdog code, but printk's mess up my timings.
-- Klaus Kusche (Software Development - Control Systems) KEBA AG Gewerbepark Urfahr, A-4041 Linz, Austria (Europe) Tel: +43 / 732 / 7090-3120 Fax: +43 / 732 / 7090-6301 E-Mail: kus@keba.com WWW: www.keba.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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