[openib-general] Re: Problems with SDP on Itanium

[Michael S. Tsirkin]

Quoting r. Bob Woodruff <robert.j.woodruff at intel.com>:
> Subject: RE: Problems with SDP on Itanium
> 
> Michael wrote,
> >No, dont think I've seen that one, but its been a while
> >since I last run anything on Itanium.
> >Can you try to debug it a little? What does it mean that
> >an application "hangs"? Is some data sent from one side not received
> >by another one?
> 
> >-- 
> >MST
> 
> Looks like it is stuck in the write()system call. 
> 
> 103: 1048573 bytes     21 times -->   3853.24 Mbps in    2076.17 usec
> 104: 1048576 bytes     24 times -->   3854.65 Mbps in    2075.42 usec
> 105: 1048579 bytes     24 times -->   3847.86 Mbps in    2079.08 usec
> 106: 1572861 bytes     24 times --> 
> Program received signal SIGINT, Interrupt.
> 0xa000000000010641 in ?? ()
> (gdb) bt
> #0  0xa000000000010641 in ?? ()
> #1  0x20000000001bf9c0 in write () from /lib/tls/libc.so.6.1
> #2  0x4000000000004920 in SendData ()
> #3  0x40000000000036e0 in main ()
> 
> Here is the gdb traceback from the other side after it hangs.
> It is blocked in a read() system call. 
> 
> (gdb) run
> Starting program: /home/exports/NetPIPE_3.5-SDP/NPtcp 
> Failed to read a valid object file image from memory.
> (no debugging symbols found)
> (no debugging symbols found)
> (no debugging symbols found)
> Send and receive buffers are 135168 and 135168 bytes
> (A bug in Linux doubles the requested buffer sizes)
> 
> Program received signal SIGINT, Interrupt.
> 0xa000000000010641 in ?? ()
> (gdb) bt
> #0  0xa000000000010641 in ?? ()
> #1  0x20000000001bf8c0 in read () from /lib/tls/libc.so.6.1
> #2  0x4000000000004a50 in RecvData ()
> #3  0x4000000000003aa0 in main ()
> 

Interesting. I'll try to look at this next week - shouldnt be too hard
to debug if I manage to reproduce it here.
Meanwhile, could you please try to enable sdp data debugging, and post the
resulting log if the problem reproduces there?

-- 
MST