Hi,
In analyzing dump of lnet_hdr I notice some strange values i don't
understand :
Below is a lnet_hdr screenshot for LNET_MSG_HELLO:
0000: ed 0d bc ee 01 00 00 00 65 01 01 0e 00 00 02 00 ........e.......
0010: 04 00 00 00 39 30 00 00 04 00 00 00 04 00 00 00 ....90..........
0020: 02 c2 3f 9b 30 2c 04 00 02 00 00 00 10 00 00 00 ..?.0,..........
0030: 02 00 03 fe 0e 01 01 65 00 00 00 00 00 00 00 00 .......e........
0040: 02 00 00 00 00 00 00 00 65 01 01 0e
........e...
I get :
- 0xeebc0ded which is magic number for TCP (no pb)
- 0x00000001 for protocol version 1 (no pb)
- 0x000200000e010165 :
0e010165 is the peer's nid (no pb) but what
is/means 00020000 ?
- the 2 next fields are for pids, dest_pid=00000004 (but sometimes i
get 81e69fca or 0) and src_pid=00003039 (12345 in decimal which is the
normal pid)
- 0x00000004 for type (LNET_MSG_HELLO ,no pb)
- 0x00000004 for payload_length (sometimes 0)
But in lib-types.h it is notified that :
/* A message contains a magic number and protocol version
* code in the header's dest_nid, the peer's NID in the src_nid, and
* LNET_MSG_HELLO in the type field. All other common fields are zero
* (including payload_size; i.e. no payload).
What are/mean non-zero values i get ? (pids, payload_length)
Moreover, lnet_hello_t struct contains 2 fields :
- incarnation and type
Incarnation looks like a cookie, is it?
I get type=1 or 2 or 3 what does it mean?
Regards,
Thibault DONADINI
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