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To do a raw conversion of the file /tmp/trace-4000 into ASCII, use:
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example% tnfdump -r /tmp/trace-4000
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The output will look like the following:
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0x10e00 : {
tnf_tag 0x109c0 tnf_block_header
generation 1
bytes_valid 320
A_lock 0
B_lock 0
next_block 0x0
}
0x10e10 : {
tnf_tag 0x10010 probe1
tnf_tag_arg 0x10e24 <tnf_sched_rec>
time_delta 128
test_ulong 4294967295
test_long -1
}
0x10e24 : {
tnf_tag 0x10cf4 tnf_sched_rec
tid 0
lwpid 1
pid 13568
time_base 277077875828500
}
0x10e3c : {
tnf_tag 0x11010 probe2
tnf_tag_arg 0x10e24 <tnf_sched_rec>
time_delta 735500
test_str 0x10e48 "string1"
}
0x10e48 : {
tnf_tag 0x1072c tnf_string
tnf_self_size 16
chars "string1"
}
0x10e58 : {
tnf_tag 0x110ec probe3
tnf_tag_arg 0x10e24 <tnf_sched_rec>
time_delta 868000
test_ulonglong 18446744073709551615
test_longlong -1
test_float 3.142857
}
...
...
...
0x110ec : {
tnf_tag 0x10030 tnf_probe_type
tnf_tag_code 42
tnf_name 0x1110c "probe3"
tnf_properties 0x1111c <tnf_properties>
tnf_slot_types 0x11130 <tnf_slot_types>
tnf_type_size 32
tnf_slot_names 0x111c4 <tnf_slot_names>
tnf_string 0x11268 "keys targdebug main;\
file targdebug.c;line 61;"
}
0x1110c : {
tnf_tag 0x10068 tnf_name
tnf_self_size 16
chars "probe3"
}
0x1111c : {
tnf_tag 0x100b4 tnf_properties
tnf_self_size 20
0 0x101a0 tnf_tagged
1 0x101c4 tnf_struct
2 0x10b84 tnf_tag_arg
}
0x11130 : {
tnf_tag 0x10210 tnf_slot_types
tnf_self_size 28
0 0x10bd0 tnf_probe_event
1 0x10c20 tnf_time_delta
2 0x1114c tnf_uint64
3 0x10d54 tnf_int64
4 0x11188 tnf_float32
}
|
The first number is the file offset of the record. The record is enclosed in braces `{ }'. The first column in a record is the slot name (for records whose fields do not have names, it is the type
name). The second column in the record is the value of that slot if it is a scalar (only scalars that are of type tnf_opaque are printed in hex), or the offset of the record if it is
a reference to another record.
The third column in a record is optional. It does not exist for scalar slots of records. If it exists, the third column is a type name with or without angle brackets, or a string in double quotes.
Unadorned names indicate a reference to the named metatag record (that is, a reference to a record with that name in the tnf_name field). Type names in angled brackets indicate a reference
to a record that is an instance of that type (that is, a reference to a record with that name in the tnf_tag field). The content of strings are printed out in double quotes at the reference
site.
Records that are arrays have their array elements follow the header slots, and are numbered 0, 1, 2, and so on, except strings where the string is written as the 'chars' (pseudo-name) slot.
Records that are events (generated by TNF_PROBE(3TNF))
will have a slot name of tnf_tag_arg as their second field which is a reference to the schedule record. Schedule records describe more information about the event like the thread-id,
process-id, and the time_base. The time_delta of an event can be added to the time_base of the schedule record that the event references, to give
an absolute time. This time is expressed as nanoseconds since some arbitrary time in the past (see gethrtime(3C)).
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