Hi, all,<br><br>I have a question on how to find the hot spot of large base Erlang system. For example, after running cprof.start(), cprof.pause(), cprof.analyze(), I got the following results (only the first item is listed below),<br>
<br>{1847012003,<br> [{io_lib_format,722457356,<br>                 [{{io_lib_format,pcount,2},109483111},<br>                  {{io_lib_format,collect,2},109483111},<br>                  {{io_lib_format,build,3},109483111},<br>
                  {{io_lib_format,iolist_to_chars,1},83312743},<br>                  {{io_lib_format,indentation,2},60014886},<br>                  {{io_lib_format,field_value,2},26618934},<br>                  {{io_lib_format,field_value,3},17824836},<br>
                  {{io_lib_format,precision,2},17706522},<br>                  {{io_lib_format,pad_char,2},17706522},<br>                  {{io_lib_format,field_width,3},17706522},<br>                  {{io_lib_format,field_width,2},17706522},<br>
                  {{io_lib_format,decr_pc,2},17706522},<br>                  {{io_lib_format,control,7},17706522},<br>                  {{io_lib_format,collect_cseq,2},17706522},<br>                  {{io_lib_format,collect_cc,2},17706522},<br>
                  {{io_lib_format,print,7},14402937},<br>                  {{io_lib_format,chars,2},8912422},<br>                  {{io_lib_format,term,5},8912417},<br>                  {{io_lib_format,min|...},8912416},<br>
                  {{io_lib_format|...},8912416},<br>                  {{...}|...},<br>                  {...}|...]},<br><br>So here comes the question, how can we find which part calls (io_lib_format,pcount,2) most? I tried to use fprof(), but it seems that you need to know the arguments of the function first.<br>
<br>What is the best practice to address this problem? Or did I do something wrong?<br><br>Thanks,<br><br>kaiduan<br>