NAME

       uftrace-info - Print tracing information from the current trace data file

SYNOPSIS

       uftrace info [options]

DESCRIPTION

       This command prints metadata recorded in the header of a given trace data file.

       Alternatively, it can:

       • be used to generate a symbol table of the traced symbols

       • print a task relationship tree for the recorded tasks in the trace

OPTIONS

       --symbols [EXECUTABLE]
              Generate  a  symbol  table  for the given traced EXECUTABLE from the recorded trace data.  See the
              example below for the output format: It will print two symbol tables - normal symbols and  dynamic
              symbols:  The  normal  symbols are traced functions in the executable itself.  The dynamic symbols
              are the traced library functions recorded in the trace.  Because only the trace data  is  used  to
              generate  symbol  information,  it  will  contain different functions than the symbol table of the
              executable file itself.

       --task Print a task relationship tree instead of the trace metadata.

EXAMPLES

       This command shows information like below:

              $ uftrace record abc

              $ uftrace info
              # system information
              # ==================
              # program version     : v0.9 ( dwarf python tui perf sched )
              # recorded on         : Wed Sep 19 17:30:39 2018
              # cmdline             : uftrace record abc
              # cpu info            : Intel(R) Core(TM) i7-3930K CPU @ 3.20GHz
              # number of cpus      : 12 / 12 (online / possible)
              # memory info         : 19.8 / 23.5 GB (free / total)
              # system load         : 0.02 / 0.07 / 0.11 (1 / 5 / 15 min)
              # kernel version      : Linux 4.5.4-1-ARCH
              # hostname            : sejong
              # distro              : "Arch Linux"
              #
              # process information
              # ===================
              # number of tasks     : 1
              # task list           : 8284(abc)
              # exe image           : /home/namhyung/tmp/abc
              # build id            : a3c50d25f7dd98dab68e94ef0f215edb06e98434
              # pattern             : regex
              # exit status         : exited with code: 0
              # elapsed time        : 0.003219479 sec
              # cpu time            : 0.003 / 0.000 sec (sys / user)
              # context switch      : 1 / 1 (voluntary / involuntary)
              # max rss             : 3104 KB
              # page fault          : 0 / 169 (major / minor)
              # disk iops           : 0 / 24 (read / write)

       To see the symbol table, one can use the --symbols option.

              $ uftrace info --symbols
              Normal symbols
              ==============
              [ 0] _start (0x400590) size: 42
              [ 1] __gmon_start__ (0x4005c0) size: 59
              [ 2] a (0x4006c6) size: 19
              [ 3] b (0x4006d9) size: 19
              [ 4] c (0x4006ec) size: 49
              [ 5] main (0x40071d) size: 19
              [ 6] __libc_csu_init (0x400730) size: 101
              [ 7] __libc_csu_fini (0x4007a0) size: 2
              [ 8] atexit (0x4007b0) size: 41

              Dynamic symbols
              ===============
              [ 0] getpid (0x400530) size: 16
              [ 1] _mcleanup (0x400540) size: 16
              [ 2] __libc_start_main (0x400550) size: 16
              [ 3] __monstartup (0x400560) size: 16
              [ 4] mcount (0x400570) size: 16
              [ 5] __cxa_atexit (0x400580) size: 16

       The --task option shows task family hierarchy.

              $ uftrace info --task
              [166399] parent
                    [166401] child

SEE ALSO

       uftrace(1), uftrace-record(1), uftrace-tui(1)

AUTHORS

       Namhyung Kim namhyung@gmail.com

Uftrace User Manuals                                Sep, 2018                                    UFTRACE-INFO(1)