Messages in this thread | | | Date | Mon, 04 Mar 2002 00:16:38 -0800 | From | Andrew Morton <> | Subject | Re: Gigabit Performance 2.4.19-preX - Excessive locks, calls, waits |
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"Jeff V. Merkey" wrote: > > ... > 34880 total 0.0202 > 28581 default_idle 595.4375 > 1125 __rdtsc_delay 35.1562 > 1094 eth_type_trans 5.2596 > 657 skb_release_data 4.5625 > 378 __make_request 0.2596 > 335 alloc_skb_frame 1.1020
Note how eth_type_trans is now the most expensive function. This is because it's the first place where the CPU touches the just-arrived ethernet header.
It would be interesting to add a prefetch() to the driver at the earliest possible time to get the header read underway. Maybe the IP header too?
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