Messages in this thread | | | From | Andreas Schwab <> | Subject | Re: [PATCH] include/linux/etherdevice.h, kernel 2.6.14 | Date | Sun, 30 Oct 2005 11:46:27 +0100 |
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"J.A. Magallon" <jamagallon@able.es> writes:
> Just for curiosity, could you both benchmark this also: > > int is_zero_ether_addr0(const unsigned char *addr) > { > return !(((unsigned long *)addr)[0] | ((unsigned short*)addr)[2]); > }
It's probably slower when addr is unaligned, especially when unaligned accesses need to be emulated.
Andreas.
-- Andreas Schwab, SuSE Labs, schwab@suse.de SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different." - 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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