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Full Discussion: Truss output interpretation
Top Forums UNIX for Advanced & Expert Users Truss output interpretation Post 302921442 by ghostdog74 on Friday 17th of October 2014 05:46:11 AM
Old 10-17-2014
Truss output interpretation
hi, anyone can help on this piece of truss output?

Code:
8094:    0.7028 write(4, 0x0043BE90, 236)                       = 236
8094:      T S H  \0\0\0EC020101\0\0\0\0\0\0\0\0\0 "02\0\0 303\0\0 I D
8094:     \f %\0\0\0\0 2\0F67F\0\0\0\0 @06FFC99A ; 
8094:      L              D6\0 303 
8094:                                                             01\0\0\0
8094:      j\0\0\0\0FF\0FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF\0\0\0\0\0\0\n\0\0\0
8094:     02\0\0\09E1F\0\001\0\0\001\0\0\0 M Q C C 0 7 0 5 0 0 0 3\0\0\0\0
8094:     \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0
8094:     \0\0\0\0\0\0\0\0\0\0\0\0
8094:    0.7029 read(4, 0x0043BE90, 32766)                      Err#11 EAGAIN
8094:   pollsys(0xFFFFFD7FFFDEE080, 1, 0xFFFFFD7FFFDEDF10, 0x00000000) (sleeping...)
8094:   20.7132 pollsys(0xFFFFFD7FFFDEE080, 1, 0xFFFFFD7FFFDEDF10, 0x00000000) = 0
8094:   pollsys(0xFFFFFD7FFFDEE080, 1, 0xFFFFFD7FFFDEDF10, 0x00000000) (sleeping...)
8094:   25.0182 pollsys(0xFFFFFD7FFFDEE080, 1, 0xFFFFFD7FFFDEDF10, 0x00000000) = 1
8094:   25.0188 read(4, 0x0043BE90, 32766)                      = 236
8094:      T S H  \0\0\0EC020102\0\0\0\0\0\0\0\0\0 "02\0\0 303\0\0 I D
8094:     \f %\090\0\0 2\0F67F\0\0\0\0 @\0FFC99A ; 
8094:      L              D6\0 303
8094:                                                             \n\0\0\0
8094:     \0\0\0\0\0FF\0FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF\0\0\0\0\0\0\n\0\0\0
8094:     02\0\0\0 k *\0\08902\0\0D301\0\0 M Q M M 0 7 0 5 0 0 0 3 X P F X
8094:      X X X X _ 2 0 1 4 - 0 9- 3 1 _ 2 0 . 0 9 . 4 5
8094:


First, there is an EAGAIN error, goes into sleeping (poll) and then after about 20 odd seconds, it begins to read. What are the possible causes ?
thanks
 

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