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1#@!#!123s

: / usr / share / systemtap / examples / memory /

Filename : pfaults.stp

back

#!/usr/bin/stap

global fault_entry_time, fault_address, fault_access
global time_offset

probe begin { time_offset = gettimeofday_us() }

probe vm.pagefault {
  t = gettimeofday_us()
  fault_entry_time[tid()] = t
  fault_address[tid()] = address
  fault_access[tid()] = write_access ? "w" : "r"
}

probe vm.pagefault.return {
  t=gettimeofday_us()
  if (!(tid() in fault_entry_time)) next
  e = t - fault_entry_time[tid()]
  if (vm_fault_contains(fault_type,VM_FAULT_MINOR)) {
    ftype="minor"
  } else if (vm_fault_contains(fault_type,VM_FAULT_MAJOR)) {
    ftype="major"
  } else {
    next #only want to deal with minor and major page faults
  }

  printf("%d:%d:%id:%s:%s:%d\n",
	t - time_offset, tid(), fault_address[tid()], fault_access[tid()], ftype, e)
  #free up memory
  delete fault_entry_time[tid()]
  delete fault_address[tid()]
  delete fault_access[tid()]
}

Name	Size	Last Modified	Owner	Permissions
cachestat.meta	0.532 KB	August 14 2023 7:22:10	root	0644
cachestat.stp	1.287 KB	August 14 2023 7:22:11	root	0755
glibc-malloc.meta	0.372 KB	August 14 2023 7:22:10	root	0644
glibc-malloc.stp	2.428 KB	August 14 2023 7:22:11	root	0755
hugepage_clear_delays.meta	0.924 KB	August 14 2023 7:22:10	root	0644
hugepage_clear_delays.stp	0.472 KB	August 14 2023 7:22:11	root	0755
hugepage_collapse.meta	0.701 KB	August 14 2023 7:22:10	root	0644
hugepage_collapse.stp	0.155 KB	August 14 2023 7:22:11	root	0755
hugepage_cow_delays.meta	1.08 KB	August 14 2023 7:22:10	root	0644
hugepage_cow_delays.stp	0.464 KB	August 14 2023 7:22:11	root	0755
hugepage_split.meta	0.738 KB	August 14 2023 7:22:10	root	0644
hugepage_split.stp	0.149 KB	August 14 2023 7:22:11	root	0755
hw_watch_addr.meta	0.769 KB	August 14 2023 7:22:10	root	0644
hw_watch_addr.stp	0.163 KB	August 14 2023 7:22:11	root	0755
hw_watch_addr.tcl	0.095 KB	August 14 2023 7:22:10	root	0644
hw_watch_sym.meta	0.698 KB	August 14 2023 7:22:10	root	0644
hw_watch_sym.stp	0.163 KB	August 14 2023 7:22:11	root	0755
hw_watch_sym.tcl	0.095 KB	August 14 2023 7:22:10	root	0644
kmalloc-top	3.797 KB	August 14 2023 7:22:10	root	0755
kmalloc-top.meta	0.679 KB	August 14 2023 7:22:10	root	0644
last_100_frees.meta	0.41 KB	August 14 2023 7:22:10	root	0644
last_100_frees.stp	0.784 KB	August 14 2023 7:22:11	root	0755
last_100_frees.tcl	0.077 KB	August 14 2023 7:22:10	root	0644
last_100_frees.txt	0.756 KB	August 14 2023 7:22:10	root	0644
mmanonpage.meta	1.196 KB	August 14 2023 7:22:10	root	0644
mmanonpage.stp	1.773 KB	August 14 2023 7:22:11	root	0755
mmfilepage.meta	1.009 KB	August 14 2023 7:22:10	root	0644
mmfilepage.stp	3.454 KB	August 14 2023 7:22:11	root	0755
mmreclaim.meta	0.592 KB	August 14 2023 7:22:10	root	0644
mmreclaim.stp	5.109 KB	August 14 2023 7:22:11	root	0755
mmwriteback.meta	1.088 KB	August 14 2023 7:22:10	root	0644
mmwriteback.stp	1.855 KB	August 14 2023 7:22:11	root	0755
numa_faults.meta	0.686 KB	August 14 2023 7:22:10	root	0644
numa_faults.stp	0.95 KB	August 14 2023 7:22:11	root	0755
numa_faults.txt	1.67 KB	August 14 2023 7:22:10	root	0644
overcommit.meta	0.57 KB	August 14 2023 7:22:10	root	0644
overcommit.stp	0.212 KB	August 14 2023 7:22:11	root	0755
pfaults.meta	0.727 KB	August 14 2023 7:22:10	root	0644
pfaults.stp	0.854 KB	August 14 2023 7:22:11	root	0755
pfaults.txt	0.545 KB	August 14 2023 7:22:10	root	0644
vm.tracepoints.meta	0.594 KB	August 14 2023 7:22:10	root	0644
vm.tracepoints.stp	0.404 KB	August 14 2023 7:22:11	root	0755
vm.tracepoints.txt	0.544 KB	August 14 2023 7:22:10	root	0644

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