# stap -v 3.10.0-229.1.2.el7.x86_64 -e '
global s_var, e_var, stat_var;

/* probe smgr__md__read__start(ForkNumber, BlockNumber, Oid, Oid, Oid,
int); */
probe process("/home/amit.kapila/workspace/master/installation/bin/postgres").mark("smgr__md__read__start") {
  s_var[pid(),1] = gettimeofday_us()
}

/* probe smgr__md__read__done(ForkNumber, BlockNumber, Oid, Oid, Oid, int,
int, int); */
probe process("/home/amit.kapila/workspace/master/installation/bin/postgres").mark("smgr__md__read__done") {
  e_var[pid(),1] = gettimeofday_us()
  if ( s_var[pid(),1] > 0 )
    stat_var[pid(),1] <<< e_var[pid(),1] - s_var[pid(),1]
}

/* probe smgr__md__write__start(ForkNumber, BlockNumber, Oid, Oid, Oid,
int); */
probe process("/home/amit.kapila/workspace/master/installation/bin/postgres").mark("smgr__md__write__start") {
  s_var[pid(),2] = gettimeofday_us()
}

/* probe smgr__md__write__done(ForkNumber, BlockNumber, Oid, Oid, Oid, int,
int, int); */
probe process("/home/amit.kapila/workspace/master/installation/bin/postgres").mark("smgr__md__write__done") {
  e_var[pid(),2] = gettimeofday_us()
  if ( s_var[pid(),2] > 0 )
    stat_var[pid(),2] <<< e_var[pid(),2] - s_var[pid(),2]
}

probe process("/home/amit.kapila/workspace/master/installation/bin/postgres").mark("buffer__sync__start") {
  printf("buffer__sync__start num_buffers: %d, dirty_buffers: %d\n",
$NBuffers, $num_to_write)
}

probe process("/home/amit.kapila/workspace/master/installation/bin/postgres").mark("checkpoint__start") {
  printf("checkpoint start\n")
}

probe process("/home/amit.kapila/workspace/master/installation/bin/postgres").mark("checkpoint__done") {
  printf("checkpoint done\n")
}

probe timer.s(1) {
  foreach ([v1,v2] in stat_var +) {
    if ( @count(stat_var[v1,v2]) >0 ) {
      printf("r1_or_w2 %d, pid: %d, min: %d, max: %d, avg: %d, sum: %d, count: %d\n", v2, v1, @min(stat_var[v1,v2]), @max(stat_var[v1,v2]), @avg(stat_var[v1,v2]), @sum(stat_var[v1,v2]), @count(stat_var[v1,v2]))
    }
  }

printf("----------------------------------end-----------------------------\n")
  delete s_var
  delete e_var
  delete stat_var
}