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RedBoot network timer question
- To: ecos-discuss at sources dot redhat dot com
- Subject: [ECOS] RedBoot network timer question
- From: Grant Edwards <grante at visi dot com>
- Date: Thu, 18 Jan 2001 17:02:05 -0600
Are the following observations correct?
1) The network code keeps track of millisecond "ticks" by
delaying for 1ms and incrementing a counter every time any
of the code uses the MS_TICKS() to check the current time.
2) But, the network polling code is only called once every
250ms [the timeout value passed to gets() by the main
loop]. I verified this by pinging the board and response
times varied from 4m to 290ms with a mean of 144ms.
3) That means that the network time only increments by a few
milliseconds once every 250ms. Time would appear to pass
very slowly to the network routines, making the TCP
timeouts longer by a factor of about 100.
--
Grant Edwards
grante@visi.com