Perf data analysis using pprof

Data for the index perf tools, we can use the built-in report and script view, use for flame Figure
flamescope also very good, but if you need cross-platform analysis using a combination perf_data_converter pprof very convenient, the following
is a simple integrated use

perf_data_converter system constructed using centos

Installation perf_data_converter

The need to build tools to support bazel, some dependencies

Installation depends

           
         yum install -y elfutils-libelf-devel 
        
         yum install -y libcap-devel

Code clone

 
         git clone https://github.com/google/perf_data_converter.git 
        
         cd perf_data_converter 
        
         bazel build src:perf_to_profile

Configuration environment variable
to add to the path path perf_data_converter

Generating a data perf.data

command

perf record

Conversion perf.data

command

 
         perf_to_profile -i perf.data -o perf-convert 
        

effect

 
         perf_to_profile -i perf.data -o perf-convert 
        
         [WARNING:src/quipper/perf_reader.cc:1036] Skipping unsupported event PERF_RECORD_CPU_MAP 
        
         [INFO:src/quipper/perf_reader.cc:1027] Number of events stored: 152820 
        
         [INFO:src/quipper/perf_parser.cc:268] Parser processed: 3418 MMAP/MMAP2 events, 593 COMM events, 724 FORK events, 169 EXIT events, 146065 SAMPLE events, 144231 of these were mapped 
        
         [INFO:src/perf_data_handler.cc:88] Using the build id found for the file name: [kernel.kallsyms], build id: 14504bc038206548e6bb85f4812ead4c3bb427f4. 
        
         [INFO:src/perf_data_handler.cc:476] guessing main for pid: 1 /usr/lib/systemd/systemd 
        
         [INFO:src/perf_data_handler.cc:476] guessing main for pid: 10415 /usr/lib/systemd/systemd-udevd 
        
         [INFO:src/perf_data_handler.cc:476] guessing main for pid: 10503 /usr/libexec/pcp/bin/pmwebd 
        
         [INFO:src/perf_data_handler.cc:476] guessing main for pid: 18404 /usr/libexec/pcp/bin/pmproxy 
        
         [INFO:src/perf_data_handler.cc:476] guessing main for pid: 4147 /usr/lib/systemd/systemd-journald 
        
         [INFO:src/perf_data_handler.cc:476] guessing main for pid: 6618 /usr/libexec/pcp/bin/pmcd 
        
         [INFO:src/perf_data_handler.cc:476] guessing main for pid: 777 /usr/lib/systemd/systemd-logind;5df33705 (deleted) 
        
         [INFO:src/perf_data_handler.cc:476] guessing main for pid: 783 /usr/lib/polkit-1/polkitd 
        
         [WARNING:src/perf_data_handler.cc:349] stat: missing_callchain_mmap 150999/1287082

Use pprof analysis

pprof supported commands

 
         callgrind Outputs a graph in callgrind format 
        
         comments Output all profile comments 
        
         disasm Output assembly listings annotated with samples 
        
         dot Outputs a graph in DOT format 
        
         eog Visualize graph through eog 
        
         evince Visualize graph through evince 
        
         gif Outputs a graph image in GIF format 
        
         gv Visualize graph through gv 
        
         kcachegrind Visualize report in KCachegrind 
        
         list Output annotated source for functions matching regexp 
        
         pdf Outputs a graph in PDF format 
        
         peek Output callers/callees of functions matching regexp 
        
         png Outputs a graph image in PNG format 
        
         proto Outputs the profile in compressed protobuf format 
        
         ps Outputs a graph in PS format 
        
         raw Outputs a text representation of the raw profile 
        
         svg Outputs a graph in SVG format 
        
         tags Outputs all tags in the profile 
        
         text Outputs top entries in text form 
        
         top Outputs top entries in text form 
        
         topproto Outputs top entries in compressed protobuf format 
        
         traces Outputs all profile samples in text form 
        
         tree Outputs a text rendering of call graph 
        
         web Visualize graph through web browser 
        
         weblist Display annotated source in a web browser 
        
         o/options List options and their current values 
        
         quit/exit/^D Exit pprof

Installation pprof

 
         go get -u github.com/google/pprof 
        

Analysis of the data generated perf
loading perf data:

           
         pprof perf-convert

Simple analysis (text):

Filtration treatment

Explanation

pprof powerful analysis golang and perf are very good tool, but also can be integrated into applications as golang package, performance analysis system is
very convenient

Reference material

https://github.com/google/perf_data_converter
https://github.com/google/pprof
https://cizixs.com/2017/09/11/profiling-golang-program/