spent by the kernel with disables interrupts?
In uniprocessor systems, can i state that the only instruction capable
of disabling interrupts is cli?
Thank u very much
Francesco Oppedisano
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the body of a me
Hi,
when i NIC writes a packet in memory using a DMA transaction, can i be
sure that this transaction will tranfer the entire frame or it is
possible to have frame fragmentation with every fragment beeing
transferred in a separate DMA transaction?
Thank u very much
Francesco Oppedisano
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To
Hi,
using tcpdump to capture ethernet packets i noticed i obtain more
packets than interrupts (taken from /proc/interrupts).
I found this with all NICs available to me (8139, e1000pro, one using
sk98lin, 3com 59x, via rhine etc..).
Where the NIC supports any type of mitigation or similar (see NAPI)
r vector)
3)fetching ISR from main memory
4)wait time when CPU is running with disabled interrupt
Do U agree?
Thank u very much
Francesco Oppedisano
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More majordo
rienced by a NIC
interrupt, but remember that i need only a coarse measure.
Nevertheless, the information about the ISR in cache is very
interesting, probably it's what i was looking forthank u.
Francesco Oppedisano
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pt latency?
Than u very much
Francesco Oppedisano
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