FM / memory

/usr/share/systemtap/examples/memory

Name	Size	Mode	Actions
cachestat.meta	545	0644	edit dl rm
cachestat.stp	1318	0755	edit dl rm
glibc-malloc.meta	381	0644	edit dl rm
glibc-malloc.stp	2486	0755	edit dl rm
hugepage_clear_delays.meta	946	0644	edit dl rm
hugepage_clear_delays.stp	483	0755	edit dl rm
hugepage_collapse.meta	718	0644	edit dl rm
hugepage_collapse.stp	159	0755	edit dl rm
hugepage_cow_delays.meta	1106	0644	edit dl rm
hugepage_cow_delays.stp	475	0755	edit dl rm
hugepage_split.meta	756	0644	edit dl rm
hugepage_split.stp	153	0755	edit dl rm
hw_watch_addr.meta	787	0644	edit dl rm
hw_watch_addr.stp	167	0755	edit dl rm
hw_watch_addr.tcl	97	0644	edit dl rm
hw_watch_sym.meta	715	0644	edit dl rm
hw_watch_sym.stp	167	0755	edit dl rm
hw_watch_sym.tcl	97	0644	edit dl rm
kmalloc-top	3888	0755	edit dl rm
kmalloc-top.meta	695	0644	edit dl rm
last_100_frees.meta	420	0644	edit dl rm
last_100_frees.stp	803	0755	edit dl rm
last_100_frees.tcl	79	0644	edit dl rm
last_100_frees.txt	774	0644	edit dl rm
mmanonpage.meta	1225	0644	edit dl rm
mmanonpage.stp	1816	0755	edit dl rm
mmfilepage.meta	1033	0644	edit dl rm
mmfilepage.stp	3537	0755	edit dl rm
mmreclaim.meta	606	0644	edit dl rm
mmreclaim.stp	5232	0755	edit dl rm
mmwriteback.meta	1114	0644	edit dl rm
mmwriteback.stp	1900	0755	edit dl rm
numa_faults.meta	702	0644	edit dl rm
numa_faults.stp	973	0755	edit dl rm
numa_faults.txt	1710	0644	edit dl rm
overcommit.meta	584	0644	edit dl rm
overcommit.stp	217	0755	edit dl rm
pfaults.meta	744	0644	edit dl rm
pfaults.stp	875	0755	edit dl rm
pfaults.txt	558	0644	edit dl rm
vm.tracepoints.meta	608	0644	edit dl rm
vm.tracepoints.stp	414	0755	edit dl rm
vm.tracepoints.txt	557	0644	edit dl rm

Edit: /usr/share/systemtap/examples/memory/mmfilepage.stp (3537B)

#!/usr/bin/stap
#
# Note that there are 2 sets of filemap kernel tracepoints:
#
# - older kernels RHEL5 (2.6.18) - RHEL6 (2.6.32): mm_filemap_fault,
#   mm_filemap_cow, mm_filemap_unmap mm_filemap_userunmap
# - newer kernels: mm_filemap_add_to_page_cache,
#   mm_filemap_delete_from_page_cache
#
# This script attempts to handle them both.

global traced_pid, command
global allocation, free

global old_set_hits
global file_fault, file_cow, file_uunmap, file_kunmap
global file_page_cache_add, file_page_cache_delete

function log_event:long ()
{
  return (!traced_pid || traced_pid == pid())
}

probe kernel.{trace("mm_page_alloc")!, trace("mm_page_allocation")} {
  if (!log_event()) next
  allocation[pid()] <<< 1
  command[pid()] = execname()
}

probe kernel.{trace("mm_page_free")!, trace("mm_page_free_direct")} {
  if (!log_event()) next
  free[pid()] <<< 1
}

probe kernel.trace("mm_filemap_fault")? {
  if (!log_event()) next
  old_set_hits <<< 1
  file_fault[pid()] <<< 1
}

probe kernel.trace("mm_filemap_cow")? {
  if (!log_event()) next
  old_set_hits <<< 1
  file_cow[pid()] <<< 1
}

probe kernel.trace("mm_filemap_unmap")? {
  if (!log_event()) next
  old_set_hits <<< 1
  file_kunmap[pid()] <<< 1
}

probe kernel.trace("mm_filemap_userunmap")? {
  if (!log_event()) next
  old_set_hits <<< 1
  file_uunmap[pid()] <<< 1
}

probe kernel.trace("mm_filemap_add_to_page_cache")? {
  if (!log_event()) next
  file_page_cache_add[pid()] <<< 1
}

probe kernel.trace("mm_filemap_delete_from_page_cache")? {
  if (!log_event()) next
  file_page_cache_delete[pid()] <<< 1
}

probe never {
  # Do a few initializations to let stap know what the global
  # variable types are. Note that since we're in a "never"
  # probe, these initializations will never actually happen.
  traced_pid = 0
  old_set_hits <<< 1
  file_fault[0] <<< 1
  file_cow[0] <<< 1
  file_uunmap[0] <<< 1
  file_kunmap[0] <<< 1
  file_page_cache_add[0] <<< 1
  file_page_cache_delete[0] <<< 1
}

probe begin {
  printf("Starting data collection\n")
  if (target())
    printf("mode Specific Pid, traced pid: %d\n\n", target())
  else
    printf("mode - All Pids\n\n")
}

function print_old_format:long ()
{
  printf("Command                 Pid     Alloc      Free  F_fault    F_cow F_kunmap F_uunmap\n")
  printf("-------                 ---     -----      ----  -------    ----- -------- --------\n")

foreach (pid+ in allocation) {
      printf("%-16s %10d %9d %9d %8d %8d %8d %8d\n",
	     command[pid], pid,
	     @count(allocation[pid]), @count(free[pid]),
	     @count(file_fault[pid]), @count(file_cow[pid]),
	     @count(file_kunmap[pid]), @count(file_uunmap[pid]))
  }
}

function print_new_format:long ()
{
  printf("Command                 Pid     Alloc      Free CacheAdd CacheDel\n")
  printf("-------                 ---     -----      ---- -------- --------\n")

foreach (pid+ in allocation) {
      printf("%-16s %10d %9d %9d %8d %8d\n",
	     command[pid], pid,
	     @count(allocation[pid]), @count(free[pid]),
	     @count(file_page_cache_add[pid]),
	     @count(file_page_cache_delete[pid]))
  }
}

probe end {
  printf("Terminating data collection\n")

# We'll either have hits from the old set of filemap tracepoints
  # (mm_filemap_fault, mm_filemap_cow, mm_filemap_unmap,
  # mm_filemap_userunmap) or the new set of filemap tracepoints
  # (mm_filemap_add_to_page_cache,
  # mm_filemap_delete_from_page_cache). Print out the set that got
  # hits.
  if (@count(old_set_hits))
    print_old_format()
  else
    print_new_format()
}

cmd: