I agree that the delay is acceptable, given Jan's two conditions. It is for our app., anyway.
Regarding re-plugging: I did a simple test (rtping from both stations, re-plugging cable a few times) and it seems to recover OK every time. Thinus -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: 15 September 2006 14:04 To: M. Koehrer Cc: Thinus Viljoen; rtnet-users@lists.sourceforge.net Subject: Re: Aw: Re: [RTnet-users] rt_e1000 driver loading M. Koehrer wrote: > O.K., > > I have done a test with the standard e1000 driver of linux (2.4.33, the Intel > e1000 driver 7.1.9) > I have written the following bash script: > modprobe e1000 > ifconfig eth1 up 192.168.2.2 > dmesg -c > sleep 1 > echo "--------" > dmesg -c > sleep 1 > echo "--------" > dmesg -c > > The output of this is: > > Intel(R) PRO/1000 Network Driver - version 7.1.9 > Copyright (c) 1999-2006 Intel Corporation. > e1000: 03:05.0: e1000_probe: (PCI:33MHz:32-bit) 00:0e:0c:b8:e9:32 > e1000: eth1: e1000_probe: Intel(R) PRO/1000 Network Connection > -------- > -------- > e1000: eth1: e1000_watchdog: NIC Link is Up 100 Mbps Half Duplex > > (Here I have connected the e1000 to a Hub - this is where the 100Mbps Half > Duplex comes from). > As you see it takes about 2 seconds after ifconfig until the e1000 is able to > communicate on Ethernet. > I think, the situation is the very same with rtnet... ...except that Thinus's report indicates total failure if transmissions takes place earlier. Could you test what happens when you sent packets during that init period? > This is not nice, however as it is a one-time initialization delay I think it > is acceptable. I think we could live with a simple delay on ifup, if A) we know for sure (or almost) how long it must be and B) cable re-plug doesn't render the device useless until the next manual ifdown/up cycle. Jan ******************************************************************************************************* Disclaimer: The information contained in this communication is confidential and may be legally privileged. It is intended solely for the use of the individual or entity to whom it is addressed and others authorised to receive it. Any review, retransmission, dissemination, copying, disclosure or other use of, or taking of any action in reliance upon, this information by person or entities other then the intended recipient is prohibited. If you have received this message in error, please notify the sender immediately by e-mail, facsimile or telephone and return and/or destroy the original message and all copies from any computer. Denel (Pty) Ltd exercises no editorial control over e-mail messages originating in the organisation and does not accept any responsibility for either the contents of the message or any copyright laws that may have been violated by the person sending this message. Denel (Pty) Ltd is neither liable for the proper and complete transmission of the information contained in this communication nor any delay in its receipt. This message should not be copied or used for any purpose other than intended, nor should it be disclosed to any other person. ******************************************************************************************************* ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ RTnet-users mailing list RTnet-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/rtnet-users
