1 #!/bin/sh 2 3 # This function just re-writes the timestamp of the strace entries to be 4 # seconds.usecs since boot. To match the timestamping of ftrace (so we can 5 # merge them later). 6 process_strace() 7 { 8 strace=$1 9 # parse in data/system/vendor and parse out /sys/devices/system/... 10 egrep '\/system\/|\/data\/|\/vendor\/' $strace | egrep -v '\/sys\/devices\/system\/' > bar 11 fgrep -v '= -1' bar > foo 12 mv foo bar 13 # begin_time is seconds since epoch 14 begin_time=`cat trace.begin` 15 # replace seconds since epoch with SECONDS SINCE BOOT in the 16 # strace files 17 awk -v begin="$begin_time" '{ printf "%f strace ", $1 - begin; $1=""; print $0}' bar > $2 18 rm bar 19 } 20 21 # 22 # This function processes the ftrace file, removing the fields that we don't care 23 # about, breaks up the ftrace file into one file per pid. 24 # Input : One single fstrace file. 25 # Output : Multiple fstrace.pid files. 26 prep_fstrace() 27 { 28 # Remove leading junk 29 fgrep android_fs_data $1 | sed 's/^.* \[.*\] //' | sed s/://g | sed s/,//g > foo 30 sed 's/android_fs_dataread_start/read/' foo > bar1 31 mv bar1 bar 32 # First column is timestamp SECONDS SINCE BOOT 33 awk '{ print $2, "ftrace", $3, $5, $7, $9, $13 }' bar > foo 34 rm bar 35 # Get all the uniq pids 36 awk '{print $7}' foo | sort | uniq > pidlist 37 for i in `cat pidlist` 38 do 39 awk -v pid=$i '{ if (pid == $7) print $0}' foo > fstrace.$i 40 done 41 rm pidlist 42 rm foo 43 } 44 45 # Merge straces and ftraces. 46 # The goal here is to catch mmap'ed IO (reads) that won't be in the 47 # strace file. The algorithm is to look for mmaps in the strace file, 48 # use the files tha are mmap'ed to search in the ftraces to pick up 49 # tracepoints from there, and merge those with the straces. 50 # The output of this function is a set of parsed_input_trace.<pid> 51 # files, that can then be compiled into .wl files 52 merge_compile() 53 { 54 for stracefile in trace.* 55 do 56 if [ $stracefile == trace.begin ] || [ $stracefile == trace.tar ]; 57 then 58 continue 59 fi 60 # Get the pid from the strace filename (pid is the extension) 61 pid=${stracefile##*.} 62 process_strace $stracefile foo.$pid 63 if ! [ -s foo.$pid ]; then 64 rm foo.$pid 65 continue 66 fi 67 # 68 # If we have matching strace and ftrace files, then look for mmaps in 69 # the strace pluck the corresponding entries for the mmap (mmaped IO) 70 # from the ftrace and merge them into the strace 71 # 72 if [ -f fstrace.$pid ]; then 73 fgrep mmap foo.$pid > bar 74 if [ -s bar ]; then 75 # Get all the unique mmap'ed filenames from the strace 76 awk '{ print $7 }' bar | sed 's/^[^<]*<//g' | sed 's/>,//g' > mapped_files 77 # Pluck all the lines from the ftrace corresponding to the mmaps 78 cat /dev/null > footemp 79 for j in `sort mapped_files | uniq` 80 do 81 # Merge the readpage(s) traces from the ftrace into strace 82 # for this mmaped file. 83 grep -w $j fstrace.$pid > foobar 84 if [ $? == 0 ]; then 85 sort foo.$pid foobar >> footemp 86 fi 87 rm foobar 88 done 89 rm mapped_files 90 if [ -s footemp ]; then 91 mv footemp parsed_input_trace.$pid 92 else 93 mv foo.$pid parsed_input_trace.$pid 94 fi 95 else 96 mv foo.$pid parsed_input_trace.$pid 97 fi 98 rm bar 99 else 100 mv foo.$pid parsed_input_trace.$pid 101 fi 102 echo compiling parsed_input_trace.$pid 103 compile_ioshark parsed_input_trace.$pid $pid.wl 104 rm parsed_input_trace.$pid 105 rm -f foo.$pid 106 done 107 } 108 109 # main() starts here 110 111 rm -f *.wl 112 rm -f parsed* 113 rm ioshark_filenames 114 115 # Pre-process the ftrace file 116 prep_fstrace fstrace 117 # Merge the ftrace file(s) with the strace files 118 merge_compile 119 120 # tar up the .wl files just created 121 tar cf wl-test.tar ioshark_filenames *.wl 122
