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|
#! /usr/bin/env stap
#
# Note that there are 2 sets of reclaim kernel tracepoints:
#
# - older kernels RHEL5 (2.6.18) - RHEL6 (2.6.32):
# mm_directreclaim_reclaimall, mm_pagereclaim_shrinkinactive,
# mm_pagereclaim_free, mm_pagereclaim_pgout,
# mm_pagereclaim_shrinkactive_a2a,
# mm_pagereclaim_shrinkinactive_i2a,
# mm_pagereclaim_shrinkactive_a2i,
# mm_pagereclaim_shrinkinactive_i2i
#
# - newer kernels: mm_vmscan_direct_reclaim_end
# mm_vmscan_lru_shrink_inactive, mm_vmscan_memcg_reclaim_end,
# mm_vmscan_memcg_softlimit_reclaim_end
#
# This script attempts to handle them both.
global traced_pid, command
global old_set_hits
global reclaims, t_reclaims
global direct_reclaims, t_direct_reclaims
global freed, t_freed
global reactivate, t_reactivate
global deactivate, t_deactivate
global pgout, t_pgout
global inactive_reclaims, t_inactive_reclaims
global cgroup_reclaims, t_cgroup_reclaims
global softlimit_reclaims, t_softlimit_reclaims
function log_event:long ()
{
return (!traced_pid || traced_pid == pid())
}
probe kernel.trace("mm_directreclaim_reclaimall")? {
if (!log_event()) next
old_set_hits <<< 1
direct_reclaims[pid()] <<< 1
t_direct_reclaims <<< 1
}
probe kernel.trace("mm_pagereclaim_shrinkinactive")? {
if (!log_event()) next
old_set_hits <<< 1
reclaims[pid()] <<< $reclaimed
t_reclaims <<< $reclaimed
command[pid()] = execname()
}
probe kernel.trace("mm_pagereclaim_free")? {
if (!log_event()) next
old_set_hits <<< 1
freed[pid()] <<< 1
t_freed <<< 1
}
probe kernel.trace("mm_pagereclaim_pgout")? {
if (!log_event()) next
old_set_hits <<< 1
pgout[pid()] <<< 1
t_pgout <<< 1
}
probe kernel.{trace("mm_pagereclaim_shrinkactive_a2a"),
trace("mm_pagereclaim_shrinkinactive_i2a")}? {
if (!log_event()) next
old_set_hits <<< 1
reactivate[pid()] <<< 1
t_reactivate <<< 1
}
probe kernel.{trace("mm_pagereclaim_shrinkactive_a2i"),
trace("mm_pagereclaim_shrinkinactive_i2i")}? {
if (!log_event()) next
old_set_hits <<< 1
deactivate[pid()] <<< 1
t_deactivate <<< 1
}
probe kernel.trace("mm_vmscan_direct_reclaim_end")? {
if (!log_event()) next
command[pid()] = execname()
direct_reclaims[pid()] <<< $nr_reclaimed
t_direct_reclaims <<< $nr_reclaimed
}
probe kernel.trace("mm_vmscan_lru_shrink_inactive")? {
if (!log_event()) next
command[pid()] = execname()
inactive_reclaims[pid()] <<< $nr_reclaimed
t_inactive_reclaims <<< $nr_reclaimed
}
probe kernel.trace("mm_vmscan_memcg_reclaim_end")? {
if (!log_event()) next
command[pid()] = execname()
cgroup_reclaims[pid()] <<< $nr_reclaimed
t_cgroup_reclaims <<< $nr_reclaimed
}
probe kernel.trace("mm_vmscan_memcg_softlimit_reclaim_end")? {
if (!log_event()) next
command[pid()] = execname()
softlimit_reclaims[pid()] <<< $nr_reclaimed
t_softlimit_reclaims <<< $nr_reclaimed
}
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
command[0] = ""
old_set_hits <<< 1
reclaims[0] <<< 1
t_reclaims <<< 1
direct_reclaims[0] <<< 1
t_direct_reclaims <<< 1
freed[0] <<< 1
t_freed <<< 1
reactivate[0] <<< 1
t_reactivate <<< 1
deactivate[0] <<< 1
t_deactivate <<< 1
pgout[0] <<< 1
t_pgout <<< 1
inactive_reclaims[0] <<< 1
t_inactive_reclaims <<< 1
cgroup_reclaims[0] <<< 1
t_cgroup_reclaims <<< 1
softlimit_reclaims[0] <<< 1
t_softlimit_reclaims <<< 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")
}
probe end {
printf("Terminating data collection\n")
if (@count(old_set_hits)) {
printf("%-16s %6s %8s %8s %8s %10s %8s %8s\n",
"Command", "Pid", "Direct", "Activate", "Deactive",
"Reclaims", "Pgout", "Freed")
printf("%-16s %6s %8s %8s %8s %10s %8s %8s\n",
"-------", "-----", "------", "--------", "--------",
"-----", "-----", "-----")
}
else {
printf("%-16s %6s %8s %8s %8s %9s\n",
"Command", "Pid", "Direct", "Cgroup", "Inactive", "SoftLimit")
printf("%-16s %6s %8s %8s %8s %9s\n",
"-------", "-----", "------", "------", "--------", "---------")
}
foreach (pid in reclaims-) {
if (@count(old_set_hits))
printf("%-16s %6d %8d %8d %8d %10d %8d %8d\n",
command[pid], pid,
@count(direct_reclaims[pid]), @count(reactivate[pid]),
@count(deactivate[pid]), @sum(reclaims[pid]),
@count(pgout[pid]), @count(freed[pid]))
else
printf("%-16s %6d %8d %8d %8d %9d\n",
command[pid], pid,
@sum(direct_reclaims[pid]), @sum(cgroup_reclaims[pid]),
@sum(inactive_reclaims[pid]), @sum(softlimit_reclaims[pid]))
}
printf("\n")
if (@count(old_set_hits))
printf("%-23s %8d %8d %8d %10d %8d %8d\n", "Totals",
@count(t_direct_reclaims), @count(t_reactivate),
@count(t_deactivate), @sum(t_reclaims),
@count(t_pgout), @count(t_freed))
else
printf("%-23s %8d %8d %8d %9d\n", "Totals",
@sum(t_direct_reclaims), @sum(t_cgroup_reclaims),
@sum(t_inactive_reclaims), @sum(t_softlimit_reclaims))
}
|
