26.5.2. Using opreport on a Single Executable

26.5.2. Using `opreport` on a Single Executable

To retrieve more detailed profiled information about a specific executable, use opreport:

opreport <mode> <executable>

<executable> must be the full path to the executable to be analyzed. <mode> must be one of the following:

-l

List sample data by symbols. For example, the following is part of the output from running the command opreport -l /lib/tls/libc-<version>.so:

 samples % symbol name 12 21.4286 __gconv_transform_utf8_internal 5 8.9286 _int_malloc 4 7.1429 malloc 3 5.3571 __i686.get_pc_thunk.bx 3 5.3571 _dl_mcount_wrapper_check 3 5.3571 mbrtowc 3 5.3571 memcpy 2 3.5714 _int_realloc 2 3.5714 _nl_intern_locale_data 2 3.5714 free 2 3.5714 strcmp 1 1.7857 __ctype_get_mb_cur_max 1 1.7857 __unregister_atfork 1 1.7857 __write_nocancel 1 1.7857 _dl_addr 1 1.7857 _int_free 1 1.7857 _itoa_word 1 1.7857 calc_eclosure_iter 1 1.7857 fopen@@GLIBC_2.1 1 1.7857 getpid 1 1.7857 memmove 1 1.7857 msort_with_tmp 1 1.7857 strcpy 1 1.7857 strlen 1 1.7857 vfprintf 1 1.7857 write

The first column is the number of samples for the symbol, the second column is the percentage of samples for this symbol relative to the overall samples for the executable, and the third column is the symbol name.

To sort the output from the largest number of samples to the smallest (reverse order), use -r in conjunction with the -l option.

-i <symbol-name>

List sample data specific to a symbol name. For example, the following output is from the command opreport -l -i __gconv_transform_utf8_internal /lib/tls/libc-<version>.so:

 samples % symbol name 12 100.000 __gconv_transform_utf8_internal

The first line is a summary for the symbol/executable combination.

The first column is the number of samples for the memory symbol. The second column is the percentage of samples for the memory address relative to the total number of samples for the symbol. The third column is the symbol name.

-d

List sample data by symbols with more detail than -l. For example, the following output is from the command opreport -l -d __gconv_transform_utf8_internal /lib/tls/libc-<version>.so:

 vma samples % symbol name 00a98640 12 100.000 __gconv_transform_utf8_internal 00a98640 1 8.3333 00a9868c 2 16.6667 00a9869a 1 8.3333 00a986c1 1 8.3333 00a98720 1 8.3333 00a98749 1 8.3333 00a98753 1 8.3333 00a98789 1 8.3333 00a98864 1 8.3333 00a98869 1 8.3333 00a98b08 1 8.3333

The data is the same as the -l option except that for each symbol, each virtual memory address used is shown. For each virtual memory address, the number of samples and percentage of samples relative to the number of samples for the symbol is displayed.

-x <symbol-name>

Exclude the comma-separated list of symbols from the output.

session:<name>

Specify the full path to the session or a directory relative to the /var/lib/oprofile/samples/ directory.