v4.19.13 snapshot.
diff --git a/Documentation/trace/postprocess/decode_msr.py b/Documentation/trace/postprocess/decode_msr.py
new file mode 100644
index 0000000..0ab40e0
--- /dev/null
+++ b/Documentation/trace/postprocess/decode_msr.py
@@ -0,0 +1,37 @@
+#!/usr/bin/python
+# add symbolic names to read_msr / write_msr in trace
+# decode_msr msr-index.h < trace
+import sys
+import re
+
+msrs = dict()
+
+with open(sys.argv[1] if len(sys.argv) > 1 else "msr-index.h", "r") as f:
+ for j in f:
+ m = re.match(r'#define (MSR_\w+)\s+(0x[0-9a-fA-F]+)', j)
+ if m:
+ msrs[int(m.group(2), 16)] = m.group(1)
+
+extra_ranges = (
+ ( "MSR_LASTBRANCH_%d_FROM_IP", 0x680, 0x69F ),
+ ( "MSR_LASTBRANCH_%d_TO_IP", 0x6C0, 0x6DF ),
+ ( "LBR_INFO_%d", 0xdc0, 0xddf ),
+)
+
+for j in sys.stdin:
+ m = re.search(r'(read|write)_msr:\s+([0-9a-f]+)', j)
+ if m:
+ r = None
+ num = int(m.group(2), 16)
+ if num in msrs:
+ r = msrs[num]
+ else:
+ for er in extra_ranges:
+ if er[1] <= num <= er[2]:
+ r = er[0] % (num - er[1],)
+ break
+ if r:
+ j = j.replace(" " + m.group(2), " " + r + "(" + m.group(2) + ")")
+ print j,
+
+
diff --git a/Documentation/trace/postprocess/trace-pagealloc-postprocess.pl b/Documentation/trace/postprocess/trace-pagealloc-postprocess.pl
new file mode 100644
index 0000000..0a120aa
--- /dev/null
+++ b/Documentation/trace/postprocess/trace-pagealloc-postprocess.pl
@@ -0,0 +1,418 @@
+#!/usr/bin/perl
+# This is a POC (proof of concept or piece of crap, take your pick) for reading the
+# text representation of trace output related to page allocation. It makes an attempt
+# to extract some high-level information on what is going on. The accuracy of the parser
+# may vary considerably
+#
+# Example usage: trace-pagealloc-postprocess.pl < /sys/kernel/debug/tracing/trace_pipe
+# other options
+# --prepend-parent Report on the parent proc and PID
+# --read-procstat If the trace lacks process info, get it from /proc
+# --ignore-pid Aggregate processes of the same name together
+#
+# Copyright (c) IBM Corporation 2009
+# Author: Mel Gorman <mel@csn.ul.ie>
+use strict;
+use Getopt::Long;
+
+# Tracepoint events
+use constant MM_PAGE_ALLOC => 1;
+use constant MM_PAGE_FREE => 2;
+use constant MM_PAGE_FREE_BATCHED => 3;
+use constant MM_PAGE_PCPU_DRAIN => 4;
+use constant MM_PAGE_ALLOC_ZONE_LOCKED => 5;
+use constant MM_PAGE_ALLOC_EXTFRAG => 6;
+use constant EVENT_UNKNOWN => 7;
+
+# Constants used to track state
+use constant STATE_PCPU_PAGES_DRAINED => 8;
+use constant STATE_PCPU_PAGES_REFILLED => 9;
+
+# High-level events extrapolated from tracepoints
+use constant HIGH_PCPU_DRAINS => 10;
+use constant HIGH_PCPU_REFILLS => 11;
+use constant HIGH_EXT_FRAGMENT => 12;
+use constant HIGH_EXT_FRAGMENT_SEVERE => 13;
+use constant HIGH_EXT_FRAGMENT_MODERATE => 14;
+use constant HIGH_EXT_FRAGMENT_CHANGED => 15;
+
+my %perprocesspid;
+my %perprocess;
+my $opt_ignorepid;
+my $opt_read_procstat;
+my $opt_prepend_parent;
+
+# Catch sigint and exit on request
+my $sigint_report = 0;
+my $sigint_exit = 0;
+my $sigint_pending = 0;
+my $sigint_received = 0;
+sub sigint_handler {
+ my $current_time = time;
+ if ($current_time - 2 > $sigint_received) {
+ print "SIGINT received, report pending. Hit ctrl-c again to exit\n";
+ $sigint_report = 1;
+ } else {
+ if (!$sigint_exit) {
+ print "Second SIGINT received quickly, exiting\n";
+ }
+ $sigint_exit++;
+ }
+
+ if ($sigint_exit > 3) {
+ print "Many SIGINTs received, exiting now without report\n";
+ exit;
+ }
+
+ $sigint_received = $current_time;
+ $sigint_pending = 1;
+}
+$SIG{INT} = "sigint_handler";
+
+# Parse command line options
+GetOptions(
+ 'ignore-pid' => \$opt_ignorepid,
+ 'read-procstat' => \$opt_read_procstat,
+ 'prepend-parent' => \$opt_prepend_parent,
+);
+
+# Defaults for dynamically discovered regex's
+my $regex_fragdetails_default = 'page=([0-9a-f]*) pfn=([0-9]*) alloc_order=([-0-9]*) fallback_order=([-0-9]*) pageblock_order=([-0-9]*) alloc_migratetype=([-0-9]*) fallback_migratetype=([-0-9]*) fragmenting=([-0-9]) change_ownership=([-0-9])';
+
+# Dyanically discovered regex
+my $regex_fragdetails;
+
+# Static regex used. Specified like this for readability and for use with /o
+# (process_pid) (cpus ) ( time ) (tpoint ) (details)
+my $regex_traceevent = '\s*([a-zA-Z0-9-]*)\s*(\[[0-9]*\])\s*([0-9.]*):\s*([a-zA-Z_]*):\s*(.*)';
+my $regex_statname = '[-0-9]*\s\((.*)\).*';
+my $regex_statppid = '[-0-9]*\s\(.*\)\s[A-Za-z]\s([0-9]*).*';
+
+sub generate_traceevent_regex {
+ my $event = shift;
+ my $default = shift;
+ my $regex;
+
+ # Read the event format or use the default
+ if (!open (FORMAT, "/sys/kernel/debug/tracing/events/$event/format")) {
+ $regex = $default;
+ } else {
+ my $line;
+ while (!eof(FORMAT)) {
+ $line = <FORMAT>;
+ if ($line =~ /^print fmt:\s"(.*)",.*/) {
+ $regex = $1;
+ $regex =~ s/%p/\([0-9a-f]*\)/g;
+ $regex =~ s/%d/\([-0-9]*\)/g;
+ $regex =~ s/%lu/\([0-9]*\)/g;
+ }
+ }
+ }
+
+ # Verify fields are in the right order
+ my $tuple;
+ foreach $tuple (split /\s/, $regex) {
+ my ($key, $value) = split(/=/, $tuple);
+ my $expected = shift;
+ if ($key ne $expected) {
+ print("WARNING: Format not as expected '$key' != '$expected'");
+ $regex =~ s/$key=\((.*)\)/$key=$1/;
+ }
+ }
+
+ if (defined shift) {
+ die("Fewer fields than expected in format");
+ }
+
+ return $regex;
+}
+$regex_fragdetails = generate_traceevent_regex("kmem/mm_page_alloc_extfrag",
+ $regex_fragdetails_default,
+ "page", "pfn",
+ "alloc_order", "fallback_order", "pageblock_order",
+ "alloc_migratetype", "fallback_migratetype",
+ "fragmenting", "change_ownership");
+
+sub read_statline($) {
+ my $pid = $_[0];
+ my $statline;
+
+ if (open(STAT, "/proc/$pid/stat")) {
+ $statline = <STAT>;
+ close(STAT);
+ }
+
+ if ($statline eq '') {
+ $statline = "-1 (UNKNOWN_PROCESS_NAME) R 0";
+ }
+
+ return $statline;
+}
+
+sub guess_process_pid($$) {
+ my $pid = $_[0];
+ my $statline = $_[1];
+
+ if ($pid == 0) {
+ return "swapper-0";
+ }
+
+ if ($statline !~ /$regex_statname/o) {
+ die("Failed to math stat line for process name :: $statline");
+ }
+ return "$1-$pid";
+}
+
+sub parent_info($$) {
+ my $pid = $_[0];
+ my $statline = $_[1];
+ my $ppid;
+
+ if ($pid == 0) {
+ return "NOPARENT-0";
+ }
+
+ if ($statline !~ /$regex_statppid/o) {
+ die("Failed to match stat line process ppid:: $statline");
+ }
+
+ # Read the ppid stat line
+ $ppid = $1;
+ return guess_process_pid($ppid, read_statline($ppid));
+}
+
+sub process_events {
+ my $traceevent;
+ my $process_pid;
+ my $cpus;
+ my $timestamp;
+ my $tracepoint;
+ my $details;
+ my $statline;
+
+ # Read each line of the event log
+EVENT_PROCESS:
+ while ($traceevent = <STDIN>) {
+ if ($traceevent =~ /$regex_traceevent/o) {
+ $process_pid = $1;
+ $tracepoint = $4;
+
+ if ($opt_read_procstat || $opt_prepend_parent) {
+ $process_pid =~ /(.*)-([0-9]*)$/;
+ my $process = $1;
+ my $pid = $2;
+
+ $statline = read_statline($pid);
+
+ if ($opt_read_procstat && $process eq '') {
+ $process_pid = guess_process_pid($pid, $statline);
+ }
+
+ if ($opt_prepend_parent) {
+ $process_pid = parent_info($pid, $statline) . " :: $process_pid";
+ }
+ }
+
+ # Unnecessary in this script. Uncomment if required
+ # $cpus = $2;
+ # $timestamp = $3;
+ } else {
+ next;
+ }
+
+ # Perl Switch() sucks majorly
+ if ($tracepoint eq "mm_page_alloc") {
+ $perprocesspid{$process_pid}->{MM_PAGE_ALLOC}++;
+ } elsif ($tracepoint eq "mm_page_free") {
+ $perprocesspid{$process_pid}->{MM_PAGE_FREE}++
+ } elsif ($tracepoint eq "mm_page_free_batched") {
+ $perprocesspid{$process_pid}->{MM_PAGE_FREE_BATCHED}++;
+ } elsif ($tracepoint eq "mm_page_pcpu_drain") {
+ $perprocesspid{$process_pid}->{MM_PAGE_PCPU_DRAIN}++;
+ $perprocesspid{$process_pid}->{STATE_PCPU_PAGES_DRAINED}++;
+ } elsif ($tracepoint eq "mm_page_alloc_zone_locked") {
+ $perprocesspid{$process_pid}->{MM_PAGE_ALLOC_ZONE_LOCKED}++;
+ $perprocesspid{$process_pid}->{STATE_PCPU_PAGES_REFILLED}++;
+ } elsif ($tracepoint eq "mm_page_alloc_extfrag") {
+
+ # Extract the details of the event now
+ $details = $5;
+
+ my ($page, $pfn);
+ my ($alloc_order, $fallback_order, $pageblock_order);
+ my ($alloc_migratetype, $fallback_migratetype);
+ my ($fragmenting, $change_ownership);
+
+ if ($details !~ /$regex_fragdetails/o) {
+ print "WARNING: Failed to parse mm_page_alloc_extfrag as expected\n";
+ next;
+ }
+
+ $perprocesspid{$process_pid}->{MM_PAGE_ALLOC_EXTFRAG}++;
+ $page = $1;
+ $pfn = $2;
+ $alloc_order = $3;
+ $fallback_order = $4;
+ $pageblock_order = $5;
+ $alloc_migratetype = $6;
+ $fallback_migratetype = $7;
+ $fragmenting = $8;
+ $change_ownership = $9;
+
+ if ($fragmenting) {
+ $perprocesspid{$process_pid}->{HIGH_EXT_FRAG}++;
+ if ($fallback_order <= 3) {
+ $perprocesspid{$process_pid}->{HIGH_EXT_FRAGMENT_SEVERE}++;
+ } else {
+ $perprocesspid{$process_pid}->{HIGH_EXT_FRAGMENT_MODERATE}++;
+ }
+ }
+ if ($change_ownership) {
+ $perprocesspid{$process_pid}->{HIGH_EXT_FRAGMENT_CHANGED}++;
+ }
+ } else {
+ $perprocesspid{$process_pid}->{EVENT_UNKNOWN}++;
+ }
+
+ # Catch a full pcpu drain event
+ if ($perprocesspid{$process_pid}->{STATE_PCPU_PAGES_DRAINED} &&
+ $tracepoint ne "mm_page_pcpu_drain") {
+
+ $perprocesspid{$process_pid}->{HIGH_PCPU_DRAINS}++;
+ $perprocesspid{$process_pid}->{STATE_PCPU_PAGES_DRAINED} = 0;
+ }
+
+ # Catch a full pcpu refill event
+ if ($perprocesspid{$process_pid}->{STATE_PCPU_PAGES_REFILLED} &&
+ $tracepoint ne "mm_page_alloc_zone_locked") {
+ $perprocesspid{$process_pid}->{HIGH_PCPU_REFILLS}++;
+ $perprocesspid{$process_pid}->{STATE_PCPU_PAGES_REFILLED} = 0;
+ }
+
+ if ($sigint_pending) {
+ last EVENT_PROCESS;
+ }
+ }
+}
+
+sub dump_stats {
+ my $hashref = shift;
+ my %stats = %$hashref;
+
+ # Dump per-process stats
+ my $process_pid;
+ my $max_strlen = 0;
+
+ # Get the maximum process name
+ foreach $process_pid (keys %perprocesspid) {
+ my $len = length($process_pid);
+ if ($len > $max_strlen) {
+ $max_strlen = $len;
+ }
+ }
+ $max_strlen += 2;
+
+ printf("\n");
+ printf("%-" . $max_strlen . "s %8s %10s %8s %8s %8s %8s %8s %8s %8s %8s %8s %8s %8s\n",
+ "Process", "Pages", "Pages", "Pages", "Pages", "PCPU", "PCPU", "PCPU", "Fragment", "Fragment", "MigType", "Fragment", "Fragment", "Unknown");
+ printf("%-" . $max_strlen . "s %8s %10s %8s %8s %8s %8s %8s %8s %8s %8s %8s %8s %8s\n",
+ "details", "allocd", "allocd", "freed", "freed", "pages", "drains", "refills", "Fallback", "Causing", "Changed", "Severe", "Moderate", "");
+
+ printf("%-" . $max_strlen . "s %8s %10s %8s %8s %8s %8s %8s %8s %8s %8s %8s %8s %8s\n",
+ "", "", "under lock", "direct", "pagevec", "drain", "", "", "", "", "", "", "", "");
+
+ foreach $process_pid (keys %stats) {
+ # Dump final aggregates
+ if ($stats{$process_pid}->{STATE_PCPU_PAGES_DRAINED}) {
+ $stats{$process_pid}->{HIGH_PCPU_DRAINS}++;
+ $stats{$process_pid}->{STATE_PCPU_PAGES_DRAINED} = 0;
+ }
+ if ($stats{$process_pid}->{STATE_PCPU_PAGES_REFILLED}) {
+ $stats{$process_pid}->{HIGH_PCPU_REFILLS}++;
+ $stats{$process_pid}->{STATE_PCPU_PAGES_REFILLED} = 0;
+ }
+
+ printf("%-" . $max_strlen . "s %8d %10d %8d %8d %8d %8d %8d %8d %8d %8d %8d %8d %8d\n",
+ $process_pid,
+ $stats{$process_pid}->{MM_PAGE_ALLOC},
+ $stats{$process_pid}->{MM_PAGE_ALLOC_ZONE_LOCKED},
+ $stats{$process_pid}->{MM_PAGE_FREE},
+ $stats{$process_pid}->{MM_PAGE_FREE_BATCHED},
+ $stats{$process_pid}->{MM_PAGE_PCPU_DRAIN},
+ $stats{$process_pid}->{HIGH_PCPU_DRAINS},
+ $stats{$process_pid}->{HIGH_PCPU_REFILLS},
+ $stats{$process_pid}->{MM_PAGE_ALLOC_EXTFRAG},
+ $stats{$process_pid}->{HIGH_EXT_FRAG},
+ $stats{$process_pid}->{HIGH_EXT_FRAGMENT_CHANGED},
+ $stats{$process_pid}->{HIGH_EXT_FRAGMENT_SEVERE},
+ $stats{$process_pid}->{HIGH_EXT_FRAGMENT_MODERATE},
+ $stats{$process_pid}->{EVENT_UNKNOWN});
+ }
+}
+
+sub aggregate_perprocesspid() {
+ my $process_pid;
+ my $process;
+ undef %perprocess;
+
+ foreach $process_pid (keys %perprocesspid) {
+ $process = $process_pid;
+ $process =~ s/-([0-9])*$//;
+ if ($process eq '') {
+ $process = "NO_PROCESS_NAME";
+ }
+
+ $perprocess{$process}->{MM_PAGE_ALLOC} += $perprocesspid{$process_pid}->{MM_PAGE_ALLOC};
+ $perprocess{$process}->{MM_PAGE_ALLOC_ZONE_LOCKED} += $perprocesspid{$process_pid}->{MM_PAGE_ALLOC_ZONE_LOCKED};
+ $perprocess{$process}->{MM_PAGE_FREE} += $perprocesspid{$process_pid}->{MM_PAGE_FREE};
+ $perprocess{$process}->{MM_PAGE_FREE_BATCHED} += $perprocesspid{$process_pid}->{MM_PAGE_FREE_BATCHED};
+ $perprocess{$process}->{MM_PAGE_PCPU_DRAIN} += $perprocesspid{$process_pid}->{MM_PAGE_PCPU_DRAIN};
+ $perprocess{$process}->{HIGH_PCPU_DRAINS} += $perprocesspid{$process_pid}->{HIGH_PCPU_DRAINS};
+ $perprocess{$process}->{HIGH_PCPU_REFILLS} += $perprocesspid{$process_pid}->{HIGH_PCPU_REFILLS};
+ $perprocess{$process}->{MM_PAGE_ALLOC_EXTFRAG} += $perprocesspid{$process_pid}->{MM_PAGE_ALLOC_EXTFRAG};
+ $perprocess{$process}->{HIGH_EXT_FRAG} += $perprocesspid{$process_pid}->{HIGH_EXT_FRAG};
+ $perprocess{$process}->{HIGH_EXT_FRAGMENT_CHANGED} += $perprocesspid{$process_pid}->{HIGH_EXT_FRAGMENT_CHANGED};
+ $perprocess{$process}->{HIGH_EXT_FRAGMENT_SEVERE} += $perprocesspid{$process_pid}->{HIGH_EXT_FRAGMENT_SEVERE};
+ $perprocess{$process}->{HIGH_EXT_FRAGMENT_MODERATE} += $perprocesspid{$process_pid}->{HIGH_EXT_FRAGMENT_MODERATE};
+ $perprocess{$process}->{EVENT_UNKNOWN} += $perprocesspid{$process_pid}->{EVENT_UNKNOWN};
+ }
+}
+
+sub report() {
+ if (!$opt_ignorepid) {
+ dump_stats(\%perprocesspid);
+ } else {
+ aggregate_perprocesspid();
+ dump_stats(\%perprocess);
+ }
+}
+
+# Process events or signals until neither is available
+sub signal_loop() {
+ my $sigint_processed;
+ do {
+ $sigint_processed = 0;
+ process_events();
+
+ # Handle pending signals if any
+ if ($sigint_pending) {
+ my $current_time = time;
+
+ if ($sigint_exit) {
+ print "Received exit signal\n";
+ $sigint_pending = 0;
+ }
+ if ($sigint_report) {
+ if ($current_time >= $sigint_received + 2) {
+ report();
+ $sigint_report = 0;
+ $sigint_pending = 0;
+ $sigint_processed = 1;
+ }
+ }
+ }
+ } while ($sigint_pending || $sigint_processed);
+}
+
+signal_loop();
+report();
diff --git a/Documentation/trace/postprocess/trace-vmscan-postprocess.pl b/Documentation/trace/postprocess/trace-vmscan-postprocess.pl
new file mode 100644
index 0000000..66bfd83
--- /dev/null
+++ b/Documentation/trace/postprocess/trace-vmscan-postprocess.pl
@@ -0,0 +1,757 @@
+#!/usr/bin/perl
+# This is a POC for reading the text representation of trace output related to
+# page reclaim. It makes an attempt to extract some high-level information on
+# what is going on. The accuracy of the parser may vary
+#
+# Example usage: trace-vmscan-postprocess.pl < /sys/kernel/debug/tracing/trace_pipe
+# other options
+# --read-procstat If the trace lacks process info, get it from /proc
+# --ignore-pid Aggregate processes of the same name together
+#
+# Copyright (c) IBM Corporation 2009
+# Author: Mel Gorman <mel@csn.ul.ie>
+use strict;
+use Getopt::Long;
+
+# Tracepoint events
+use constant MM_VMSCAN_DIRECT_RECLAIM_BEGIN => 1;
+use constant MM_VMSCAN_DIRECT_RECLAIM_END => 2;
+use constant MM_VMSCAN_KSWAPD_WAKE => 3;
+use constant MM_VMSCAN_KSWAPD_SLEEP => 4;
+use constant MM_VMSCAN_LRU_SHRINK_ACTIVE => 5;
+use constant MM_VMSCAN_LRU_SHRINK_INACTIVE => 6;
+use constant MM_VMSCAN_LRU_ISOLATE => 7;
+use constant MM_VMSCAN_WRITEPAGE_FILE_SYNC => 8;
+use constant MM_VMSCAN_WRITEPAGE_ANON_SYNC => 9;
+use constant MM_VMSCAN_WRITEPAGE_FILE_ASYNC => 10;
+use constant MM_VMSCAN_WRITEPAGE_ANON_ASYNC => 11;
+use constant MM_VMSCAN_WRITEPAGE_ASYNC => 12;
+use constant EVENT_UNKNOWN => 13;
+
+# Per-order events
+use constant MM_VMSCAN_DIRECT_RECLAIM_BEGIN_PERORDER => 11;
+use constant MM_VMSCAN_WAKEUP_KSWAPD_PERORDER => 12;
+use constant MM_VMSCAN_KSWAPD_WAKE_PERORDER => 13;
+use constant HIGH_KSWAPD_REWAKEUP_PERORDER => 14;
+
+# Constants used to track state
+use constant STATE_DIRECT_BEGIN => 15;
+use constant STATE_DIRECT_ORDER => 16;
+use constant STATE_KSWAPD_BEGIN => 17;
+use constant STATE_KSWAPD_ORDER => 18;
+
+# High-level events extrapolated from tracepoints
+use constant HIGH_DIRECT_RECLAIM_LATENCY => 19;
+use constant HIGH_KSWAPD_LATENCY => 20;
+use constant HIGH_KSWAPD_REWAKEUP => 21;
+use constant HIGH_NR_SCANNED => 22;
+use constant HIGH_NR_TAKEN => 23;
+use constant HIGH_NR_RECLAIMED => 24;
+use constant HIGH_NR_FILE_SCANNED => 25;
+use constant HIGH_NR_ANON_SCANNED => 26;
+use constant HIGH_NR_FILE_RECLAIMED => 27;
+use constant HIGH_NR_ANON_RECLAIMED => 28;
+
+my %perprocesspid;
+my %perprocess;
+my %last_procmap;
+my $opt_ignorepid;
+my $opt_read_procstat;
+
+my $total_wakeup_kswapd;
+my ($total_direct_reclaim, $total_direct_nr_scanned);
+my ($total_direct_nr_file_scanned, $total_direct_nr_anon_scanned);
+my ($total_direct_latency, $total_kswapd_latency);
+my ($total_direct_nr_reclaimed);
+my ($total_direct_nr_file_reclaimed, $total_direct_nr_anon_reclaimed);
+my ($total_direct_writepage_file_sync, $total_direct_writepage_file_async);
+my ($total_direct_writepage_anon_sync, $total_direct_writepage_anon_async);
+my ($total_kswapd_nr_scanned, $total_kswapd_wake);
+my ($total_kswapd_nr_file_scanned, $total_kswapd_nr_anon_scanned);
+my ($total_kswapd_writepage_file_sync, $total_kswapd_writepage_file_async);
+my ($total_kswapd_writepage_anon_sync, $total_kswapd_writepage_anon_async);
+my ($total_kswapd_nr_reclaimed);
+my ($total_kswapd_nr_file_reclaimed, $total_kswapd_nr_anon_reclaimed);
+
+# Catch sigint and exit on request
+my $sigint_report = 0;
+my $sigint_exit = 0;
+my $sigint_pending = 0;
+my $sigint_received = 0;
+sub sigint_handler {
+ my $current_time = time;
+ if ($current_time - 2 > $sigint_received) {
+ print "SIGINT received, report pending. Hit ctrl-c again to exit\n";
+ $sigint_report = 1;
+ } else {
+ if (!$sigint_exit) {
+ print "Second SIGINT received quickly, exiting\n";
+ }
+ $sigint_exit++;
+ }
+
+ if ($sigint_exit > 3) {
+ print "Many SIGINTs received, exiting now without report\n";
+ exit;
+ }
+
+ $sigint_received = $current_time;
+ $sigint_pending = 1;
+}
+$SIG{INT} = "sigint_handler";
+
+# Parse command line options
+GetOptions(
+ 'ignore-pid' => \$opt_ignorepid,
+ 'read-procstat' => \$opt_read_procstat,
+);
+
+# Defaults for dynamically discovered regex's
+my $regex_direct_begin_default = 'order=([0-9]*) may_writepage=([0-9]*) gfp_flags=([A-Z_|]*)';
+my $regex_direct_end_default = 'nr_reclaimed=([0-9]*)';
+my $regex_kswapd_wake_default = 'nid=([0-9]*) order=([0-9]*)';
+my $regex_kswapd_sleep_default = 'nid=([0-9]*)';
+my $regex_wakeup_kswapd_default = 'nid=([0-9]*) zid=([0-9]*) order=([0-9]*) gfp_flags=([A-Z_|]*)';
+my $regex_lru_isolate_default = 'isolate_mode=([0-9]*) classzone_idx=([0-9]*) order=([0-9]*) nr_requested=([0-9]*) nr_scanned=([0-9]*) nr_skipped=([0-9]*) nr_taken=([0-9]*) lru=([a-z_]*)';
+my $regex_lru_shrink_inactive_default = 'nid=([0-9]*) nr_scanned=([0-9]*) nr_reclaimed=([0-9]*) nr_dirty=([0-9]*) nr_writeback=([0-9]*) nr_congested=([0-9]*) nr_immediate=([0-9]*) nr_activate=([0-9]*) nr_ref_keep=([0-9]*) nr_unmap_fail=([0-9]*) priority=([0-9]*) flags=([A-Z_|]*)';
+my $regex_lru_shrink_active_default = 'lru=([A-Z_]*) nr_scanned=([0-9]*) nr_rotated=([0-9]*) priority=([0-9]*)';
+my $regex_writepage_default = 'page=([0-9a-f]*) pfn=([0-9]*) flags=([A-Z_|]*)';
+
+# Dyanically discovered regex
+my $regex_direct_begin;
+my $regex_direct_end;
+my $regex_kswapd_wake;
+my $regex_kswapd_sleep;
+my $regex_wakeup_kswapd;
+my $regex_lru_isolate;
+my $regex_lru_shrink_inactive;
+my $regex_lru_shrink_active;
+my $regex_writepage;
+
+# Static regex used. Specified like this for readability and for use with /o
+# (process_pid) (cpus ) ( time ) (tpoint ) (details)
+my $regex_traceevent = '\s*([a-zA-Z0-9-]*)\s*(\[[0-9]*\])(\s*[dX.][Nnp.][Hhs.][0-9a-fA-F.]*|)\s*([0-9.]*):\s*([a-zA-Z_]*):\s*(.*)';
+my $regex_statname = '[-0-9]*\s\((.*)\).*';
+my $regex_statppid = '[-0-9]*\s\(.*\)\s[A-Za-z]\s([0-9]*).*';
+
+sub generate_traceevent_regex {
+ my $event = shift;
+ my $default = shift;
+ my $regex;
+
+ # Read the event format or use the default
+ if (!open (FORMAT, "/sys/kernel/debug/tracing/events/$event/format")) {
+ print("WARNING: Event $event format string not found\n");
+ return $default;
+ } else {
+ my $line;
+ while (!eof(FORMAT)) {
+ $line = <FORMAT>;
+ $line =~ s/, REC->.*//;
+ if ($line =~ /^print fmt:\s"(.*)".*/) {
+ $regex = $1;
+ $regex =~ s/%s/\([0-9a-zA-Z|_]*\)/g;
+ $regex =~ s/%p/\([0-9a-f]*\)/g;
+ $regex =~ s/%d/\([-0-9]*\)/g;
+ $regex =~ s/%ld/\([-0-9]*\)/g;
+ $regex =~ s/%lu/\([0-9]*\)/g;
+ }
+ }
+ }
+
+ # Can't handle the print_flags stuff but in the context of this
+ # script, it really doesn't matter
+ $regex =~ s/\(REC.*\) \? __print_flags.*//;
+
+ # Verify fields are in the right order
+ my $tuple;
+ foreach $tuple (split /\s/, $regex) {
+ my ($key, $value) = split(/=/, $tuple);
+ my $expected = shift;
+ if ($key ne $expected) {
+ print("WARNING: Format not as expected for event $event '$key' != '$expected'\n");
+ $regex =~ s/$key=\((.*)\)/$key=$1/;
+ }
+ }
+
+ if (defined shift) {
+ die("Fewer fields than expected in format");
+ }
+
+ return $regex;
+}
+
+$regex_direct_begin = generate_traceevent_regex(
+ "vmscan/mm_vmscan_direct_reclaim_begin",
+ $regex_direct_begin_default,
+ "order", "may_writepage",
+ "gfp_flags");
+$regex_direct_end = generate_traceevent_regex(
+ "vmscan/mm_vmscan_direct_reclaim_end",
+ $regex_direct_end_default,
+ "nr_reclaimed");
+$regex_kswapd_wake = generate_traceevent_regex(
+ "vmscan/mm_vmscan_kswapd_wake",
+ $regex_kswapd_wake_default,
+ "nid", "order");
+$regex_kswapd_sleep = generate_traceevent_regex(
+ "vmscan/mm_vmscan_kswapd_sleep",
+ $regex_kswapd_sleep_default,
+ "nid");
+$regex_wakeup_kswapd = generate_traceevent_regex(
+ "vmscan/mm_vmscan_wakeup_kswapd",
+ $regex_wakeup_kswapd_default,
+ "nid", "zid", "order", "gfp_flags");
+$regex_lru_isolate = generate_traceevent_regex(
+ "vmscan/mm_vmscan_lru_isolate",
+ $regex_lru_isolate_default,
+ "isolate_mode", "classzone_idx", "order",
+ "nr_requested", "nr_scanned", "nr_skipped", "nr_taken",
+ "lru");
+$regex_lru_shrink_inactive = generate_traceevent_regex(
+ "vmscan/mm_vmscan_lru_shrink_inactive",
+ $regex_lru_shrink_inactive_default,
+ "nid", "nr_scanned", "nr_reclaimed", "nr_dirty", "nr_writeback",
+ "nr_congested", "nr_immediate", "nr_activate", "nr_ref_keep",
+ "nr_unmap_fail", "priority", "flags");
+$regex_lru_shrink_active = generate_traceevent_regex(
+ "vmscan/mm_vmscan_lru_shrink_active",
+ $regex_lru_shrink_active_default,
+ "nid", "zid",
+ "lru",
+ "nr_scanned", "nr_rotated", "priority");
+$regex_writepage = generate_traceevent_regex(
+ "vmscan/mm_vmscan_writepage",
+ $regex_writepage_default,
+ "page", "pfn", "flags");
+
+sub read_statline($) {
+ my $pid = $_[0];
+ my $statline;
+
+ if (open(STAT, "/proc/$pid/stat")) {
+ $statline = <STAT>;
+ close(STAT);
+ }
+
+ if ($statline eq '') {
+ $statline = "-1 (UNKNOWN_PROCESS_NAME) R 0";
+ }
+
+ return $statline;
+}
+
+sub guess_process_pid($$) {
+ my $pid = $_[0];
+ my $statline = $_[1];
+
+ if ($pid == 0) {
+ return "swapper-0";
+ }
+
+ if ($statline !~ /$regex_statname/o) {
+ die("Failed to math stat line for process name :: $statline");
+ }
+ return "$1-$pid";
+}
+
+# Convert sec.usec timestamp format
+sub timestamp_to_ms($) {
+ my $timestamp = $_[0];
+
+ my ($sec, $usec) = split (/\./, $timestamp);
+ return ($sec * 1000) + ($usec / 1000);
+}
+
+sub process_events {
+ my $traceevent;
+ my $process_pid;
+ my $cpus;
+ my $timestamp;
+ my $tracepoint;
+ my $details;
+ my $statline;
+
+ # Read each line of the event log
+EVENT_PROCESS:
+ while ($traceevent = <STDIN>) {
+ if ($traceevent =~ /$regex_traceevent/o) {
+ $process_pid = $1;
+ $timestamp = $4;
+ $tracepoint = $5;
+
+ $process_pid =~ /(.*)-([0-9]*)$/;
+ my $process = $1;
+ my $pid = $2;
+
+ if ($process eq "") {
+ $process = $last_procmap{$pid};
+ $process_pid = "$process-$pid";
+ }
+ $last_procmap{$pid} = $process;
+
+ if ($opt_read_procstat) {
+ $statline = read_statline($pid);
+ if ($opt_read_procstat && $process eq '') {
+ $process_pid = guess_process_pid($pid, $statline);
+ }
+ }
+ } else {
+ next;
+ }
+
+ # Perl Switch() sucks majorly
+ if ($tracepoint eq "mm_vmscan_direct_reclaim_begin") {
+ $timestamp = timestamp_to_ms($timestamp);
+ $perprocesspid{$process_pid}->{MM_VMSCAN_DIRECT_RECLAIM_BEGIN}++;
+ $perprocesspid{$process_pid}->{STATE_DIRECT_BEGIN} = $timestamp;
+
+ $details = $6;
+ if ($details !~ /$regex_direct_begin/o) {
+ print "WARNING: Failed to parse mm_vmscan_direct_reclaim_begin as expected\n";
+ print " $details\n";
+ print " $regex_direct_begin\n";
+ next;
+ }
+ my $order = $1;
+ $perprocesspid{$process_pid}->{MM_VMSCAN_DIRECT_RECLAIM_BEGIN_PERORDER}[$order]++;
+ $perprocesspid{$process_pid}->{STATE_DIRECT_ORDER} = $order;
+ } elsif ($tracepoint eq "mm_vmscan_direct_reclaim_end") {
+ # Count the event itself
+ my $index = $perprocesspid{$process_pid}->{MM_VMSCAN_DIRECT_RECLAIM_END};
+ $perprocesspid{$process_pid}->{MM_VMSCAN_DIRECT_RECLAIM_END}++;
+
+ # Record how long direct reclaim took this time
+ if (defined $perprocesspid{$process_pid}->{STATE_DIRECT_BEGIN}) {
+ $timestamp = timestamp_to_ms($timestamp);
+ my $order = $perprocesspid{$process_pid}->{STATE_DIRECT_ORDER};
+ my $latency = ($timestamp - $perprocesspid{$process_pid}->{STATE_DIRECT_BEGIN});
+ $perprocesspid{$process_pid}->{HIGH_DIRECT_RECLAIM_LATENCY}[$index] = "$order-$latency";
+ }
+ } elsif ($tracepoint eq "mm_vmscan_kswapd_wake") {
+ $details = $6;
+ if ($details !~ /$regex_kswapd_wake/o) {
+ print "WARNING: Failed to parse mm_vmscan_kswapd_wake as expected\n";
+ print " $details\n";
+ print " $regex_kswapd_wake\n";
+ next;
+ }
+
+ my $order = $2;
+ $perprocesspid{$process_pid}->{STATE_KSWAPD_ORDER} = $order;
+ if (!$perprocesspid{$process_pid}->{STATE_KSWAPD_BEGIN}) {
+ $timestamp = timestamp_to_ms($timestamp);
+ $perprocesspid{$process_pid}->{MM_VMSCAN_KSWAPD_WAKE}++;
+ $perprocesspid{$process_pid}->{STATE_KSWAPD_BEGIN} = $timestamp;
+ $perprocesspid{$process_pid}->{MM_VMSCAN_KSWAPD_WAKE_PERORDER}[$order]++;
+ } else {
+ $perprocesspid{$process_pid}->{HIGH_KSWAPD_REWAKEUP}++;
+ $perprocesspid{$process_pid}->{HIGH_KSWAPD_REWAKEUP_PERORDER}[$order]++;
+ }
+ } elsif ($tracepoint eq "mm_vmscan_kswapd_sleep") {
+
+ # Count the event itself
+ my $index = $perprocesspid{$process_pid}->{MM_VMSCAN_KSWAPD_SLEEP};
+ $perprocesspid{$process_pid}->{MM_VMSCAN_KSWAPD_SLEEP}++;
+
+ # Record how long kswapd was awake
+ $timestamp = timestamp_to_ms($timestamp);
+ my $order = $perprocesspid{$process_pid}->{STATE_KSWAPD_ORDER};
+ my $latency = ($timestamp - $perprocesspid{$process_pid}->{STATE_KSWAPD_BEGIN});
+ $perprocesspid{$process_pid}->{HIGH_KSWAPD_LATENCY}[$index] = "$order-$latency";
+ $perprocesspid{$process_pid}->{STATE_KSWAPD_BEGIN} = 0;
+ } elsif ($tracepoint eq "mm_vmscan_wakeup_kswapd") {
+ $perprocesspid{$process_pid}->{MM_VMSCAN_WAKEUP_KSWAPD}++;
+
+ $details = $6;
+ if ($details !~ /$regex_wakeup_kswapd/o) {
+ print "WARNING: Failed to parse mm_vmscan_wakeup_kswapd as expected\n";
+ print " $details\n";
+ print " $regex_wakeup_kswapd\n";
+ next;
+ }
+ my $order = $3;
+ $perprocesspid{$process_pid}->{MM_VMSCAN_WAKEUP_KSWAPD_PERORDER}[$order]++;
+ } elsif ($tracepoint eq "mm_vmscan_lru_isolate") {
+ $details = $6;
+ if ($details !~ /$regex_lru_isolate/o) {
+ print "WARNING: Failed to parse mm_vmscan_lru_isolate as expected\n";
+ print " $details\n";
+ print " $regex_lru_isolate/o\n";
+ next;
+ }
+ my $isolate_mode = $1;
+ my $nr_scanned = $5;
+ my $file = $8;
+
+ # To closer match vmstat scanning statistics, only count isolate_both
+ # and isolate_inactive as scanning. isolate_active is rotation
+ # isolate_inactive == 1
+ # isolate_active == 2
+ # isolate_both == 3
+ if ($isolate_mode != 2) {
+ $perprocesspid{$process_pid}->{HIGH_NR_SCANNED} += $nr_scanned;
+ if ($file =~ /_file/) {
+ $perprocesspid{$process_pid}->{HIGH_NR_FILE_SCANNED} += $nr_scanned;
+ } else {
+ $perprocesspid{$process_pid}->{HIGH_NR_ANON_SCANNED} += $nr_scanned;
+ }
+ }
+ } elsif ($tracepoint eq "mm_vmscan_lru_shrink_inactive") {
+ $details = $6;
+ if ($details !~ /$regex_lru_shrink_inactive/o) {
+ print "WARNING: Failed to parse mm_vmscan_lru_shrink_inactive as expected\n";
+ print " $details\n";
+ print " $regex_lru_shrink_inactive/o\n";
+ next;
+ }
+
+ my $nr_reclaimed = $3;
+ my $flags = $12;
+ my $file = 0;
+ if ($flags =~ /RECLAIM_WB_FILE/) {
+ $file = 1;
+ }
+ $perprocesspid{$process_pid}->{HIGH_NR_RECLAIMED} += $nr_reclaimed;
+ if ($file) {
+ $perprocesspid{$process_pid}->{HIGH_NR_FILE_RECLAIMED} += $nr_reclaimed;
+ } else {
+ $perprocesspid{$process_pid}->{HIGH_NR_ANON_RECLAIMED} += $nr_reclaimed;
+ }
+ } elsif ($tracepoint eq "mm_vmscan_writepage") {
+ $details = $6;
+ if ($details !~ /$regex_writepage/o) {
+ print "WARNING: Failed to parse mm_vmscan_writepage as expected\n";
+ print " $details\n";
+ print " $regex_writepage\n";
+ next;
+ }
+
+ my $flags = $3;
+ my $file = 0;
+ my $sync_io = 0;
+ if ($flags =~ /RECLAIM_WB_FILE/) {
+ $file = 1;
+ }
+ if ($flags =~ /RECLAIM_WB_SYNC/) {
+ $sync_io = 1;
+ }
+ if ($sync_io) {
+ if ($file) {
+ $perprocesspid{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_SYNC}++;
+ } else {
+ $perprocesspid{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_SYNC}++;
+ }
+ } else {
+ if ($file) {
+ $perprocesspid{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_ASYNC}++;
+ } else {
+ $perprocesspid{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_ASYNC}++;
+ }
+ }
+ } else {
+ $perprocesspid{$process_pid}->{EVENT_UNKNOWN}++;
+ }
+
+ if ($sigint_pending) {
+ last EVENT_PROCESS;
+ }
+ }
+}
+
+sub dump_stats {
+ my $hashref = shift;
+ my %stats = %$hashref;
+
+ # Dump per-process stats
+ my $process_pid;
+ my $max_strlen = 0;
+
+ # Get the maximum process name
+ foreach $process_pid (keys %perprocesspid) {
+ my $len = length($process_pid);
+ if ($len > $max_strlen) {
+ $max_strlen = $len;
+ }
+ }
+ $max_strlen += 2;
+
+ # Work out latencies
+ printf("\n") if !$opt_ignorepid;
+ printf("Reclaim latencies expressed as order-latency_in_ms\n") if !$opt_ignorepid;
+ foreach $process_pid (keys %stats) {
+
+ if (!$stats{$process_pid}->{HIGH_DIRECT_RECLAIM_LATENCY}[0] &&
+ !$stats{$process_pid}->{HIGH_KSWAPD_LATENCY}[0]) {
+ next;
+ }
+
+ printf "%-" . $max_strlen . "s ", $process_pid if !$opt_ignorepid;
+ my $index = 0;
+ while (defined $stats{$process_pid}->{HIGH_DIRECT_RECLAIM_LATENCY}[$index] ||
+ defined $stats{$process_pid}->{HIGH_KSWAPD_LATENCY}[$index]) {
+
+ if ($stats{$process_pid}->{HIGH_DIRECT_RECLAIM_LATENCY}[$index]) {
+ printf("%s ", $stats{$process_pid}->{HIGH_DIRECT_RECLAIM_LATENCY}[$index]) if !$opt_ignorepid;
+ my ($dummy, $latency) = split(/-/, $stats{$process_pid}->{HIGH_DIRECT_RECLAIM_LATENCY}[$index]);
+ $total_direct_latency += $latency;
+ } else {
+ printf("%s ", $stats{$process_pid}->{HIGH_KSWAPD_LATENCY}[$index]) if !$opt_ignorepid;
+ my ($dummy, $latency) = split(/-/, $stats{$process_pid}->{HIGH_KSWAPD_LATENCY}[$index]);
+ $total_kswapd_latency += $latency;
+ }
+ $index++;
+ }
+ print "\n" if !$opt_ignorepid;
+ }
+
+ # Print out process activity
+ printf("\n");
+ printf("%-" . $max_strlen . "s %8s %10s %8s %8s %8s %8s %8s %8s\n", "Process", "Direct", "Wokeup", "Pages", "Pages", "Pages", "Pages", "Time");
+ printf("%-" . $max_strlen . "s %8s %10s %8s %8s %8s %8s %8s %8s\n", "details", "Rclms", "Kswapd", "Scanned", "Rclmed", "Sync-IO", "ASync-IO", "Stalled");
+ foreach $process_pid (keys %stats) {
+
+ if (!$stats{$process_pid}->{MM_VMSCAN_DIRECT_RECLAIM_BEGIN}) {
+ next;
+ }
+
+ $total_direct_reclaim += $stats{$process_pid}->{MM_VMSCAN_DIRECT_RECLAIM_BEGIN};
+ $total_wakeup_kswapd += $stats{$process_pid}->{MM_VMSCAN_WAKEUP_KSWAPD};
+ $total_direct_nr_scanned += $stats{$process_pid}->{HIGH_NR_SCANNED};
+ $total_direct_nr_file_scanned += $stats{$process_pid}->{HIGH_NR_FILE_SCANNED};
+ $total_direct_nr_anon_scanned += $stats{$process_pid}->{HIGH_NR_ANON_SCANNED};
+ $total_direct_nr_reclaimed += $stats{$process_pid}->{HIGH_NR_RECLAIMED};
+ $total_direct_nr_file_reclaimed += $stats{$process_pid}->{HIGH_NR_FILE_RECLAIMED};
+ $total_direct_nr_anon_reclaimed += $stats{$process_pid}->{HIGH_NR_ANON_RECLAIMED};
+ $total_direct_writepage_file_sync += $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_SYNC};
+ $total_direct_writepage_anon_sync += $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_SYNC};
+ $total_direct_writepage_file_async += $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_ASYNC};
+
+ $total_direct_writepage_anon_async += $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_ASYNC};
+
+ my $index = 0;
+ my $this_reclaim_delay = 0;
+ while (defined $stats{$process_pid}->{HIGH_DIRECT_RECLAIM_LATENCY}[$index]) {
+ my ($dummy, $latency) = split(/-/, $stats{$process_pid}->{HIGH_DIRECT_RECLAIM_LATENCY}[$index]);
+ $this_reclaim_delay += $latency;
+ $index++;
+ }
+
+ printf("%-" . $max_strlen . "s %8d %10d %8u %8u %8u %8u %8.3f",
+ $process_pid,
+ $stats{$process_pid}->{MM_VMSCAN_DIRECT_RECLAIM_BEGIN},
+ $stats{$process_pid}->{MM_VMSCAN_WAKEUP_KSWAPD},
+ $stats{$process_pid}->{HIGH_NR_SCANNED},
+ $stats{$process_pid}->{HIGH_NR_FILE_SCANNED},
+ $stats{$process_pid}->{HIGH_NR_ANON_SCANNED},
+ $stats{$process_pid}->{HIGH_NR_RECLAIMED},
+ $stats{$process_pid}->{HIGH_NR_FILE_RECLAIMED},
+ $stats{$process_pid}->{HIGH_NR_ANON_RECLAIMED},
+ $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_SYNC} + $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_SYNC},
+ $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_ASYNC} + $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_ASYNC},
+ $this_reclaim_delay / 1000);
+
+ if ($stats{$process_pid}->{MM_VMSCAN_DIRECT_RECLAIM_BEGIN}) {
+ print " ";
+ for (my $order = 0; $order < 20; $order++) {
+ my $count = $stats{$process_pid}->{MM_VMSCAN_DIRECT_RECLAIM_BEGIN_PERORDER}[$order];
+ if ($count != 0) {
+ print "direct-$order=$count ";
+ }
+ }
+ }
+ if ($stats{$process_pid}->{MM_VMSCAN_WAKEUP_KSWAPD}) {
+ print " ";
+ for (my $order = 0; $order < 20; $order++) {
+ my $count = $stats{$process_pid}->{MM_VMSCAN_WAKEUP_KSWAPD_PERORDER}[$order];
+ if ($count != 0) {
+ print "wakeup-$order=$count ";
+ }
+ }
+ }
+
+ print "\n";
+ }
+
+ # Print out kswapd activity
+ printf("\n");
+ printf("%-" . $max_strlen . "s %8s %10s %8s %8s %8s %8s\n", "Kswapd", "Kswapd", "Order", "Pages", "Pages", "Pages", "Pages");
+ printf("%-" . $max_strlen . "s %8s %10s %8s %8s %8s %8s\n", "Instance", "Wakeups", "Re-wakeup", "Scanned", "Rclmed", "Sync-IO", "ASync-IO");
+ foreach $process_pid (keys %stats) {
+
+ if (!$stats{$process_pid}->{MM_VMSCAN_KSWAPD_WAKE}) {
+ next;
+ }
+
+ $total_kswapd_wake += $stats{$process_pid}->{MM_VMSCAN_KSWAPD_WAKE};
+ $total_kswapd_nr_scanned += $stats{$process_pid}->{HIGH_NR_SCANNED};
+ $total_kswapd_nr_file_scanned += $stats{$process_pid}->{HIGH_NR_FILE_SCANNED};
+ $total_kswapd_nr_anon_scanned += $stats{$process_pid}->{HIGH_NR_ANON_SCANNED};
+ $total_kswapd_nr_reclaimed += $stats{$process_pid}->{HIGH_NR_RECLAIMED};
+ $total_kswapd_nr_file_reclaimed += $stats{$process_pid}->{HIGH_NR_FILE_RECLAIMED};
+ $total_kswapd_nr_anon_reclaimed += $stats{$process_pid}->{HIGH_NR_ANON_RECLAIMED};
+ $total_kswapd_writepage_file_sync += $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_SYNC};
+ $total_kswapd_writepage_anon_sync += $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_SYNC};
+ $total_kswapd_writepage_file_async += $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_ASYNC};
+ $total_kswapd_writepage_anon_async += $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_ASYNC};
+
+ printf("%-" . $max_strlen . "s %8d %10d %8u %8u %8i %8u",
+ $process_pid,
+ $stats{$process_pid}->{MM_VMSCAN_KSWAPD_WAKE},
+ $stats{$process_pid}->{HIGH_KSWAPD_REWAKEUP},
+ $stats{$process_pid}->{HIGH_NR_SCANNED},
+ $stats{$process_pid}->{HIGH_NR_FILE_SCANNED},
+ $stats{$process_pid}->{HIGH_NR_ANON_SCANNED},
+ $stats{$process_pid}->{HIGH_NR_RECLAIMED},
+ $stats{$process_pid}->{HIGH_NR_FILE_RECLAIMED},
+ $stats{$process_pid}->{HIGH_NR_ANON_RECLAIMED},
+ $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_SYNC} + $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_SYNC},
+ $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_ASYNC} + $stats{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_ASYNC});
+
+ if ($stats{$process_pid}->{MM_VMSCAN_KSWAPD_WAKE}) {
+ print " ";
+ for (my $order = 0; $order < 20; $order++) {
+ my $count = $stats{$process_pid}->{MM_VMSCAN_KSWAPD_WAKE_PERORDER}[$order];
+ if ($count != 0) {
+ print "wake-$order=$count ";
+ }
+ }
+ }
+ if ($stats{$process_pid}->{HIGH_KSWAPD_REWAKEUP}) {
+ print " ";
+ for (my $order = 0; $order < 20; $order++) {
+ my $count = $stats{$process_pid}->{HIGH_KSWAPD_REWAKEUP_PERORDER}[$order];
+ if ($count != 0) {
+ print "rewake-$order=$count ";
+ }
+ }
+ }
+ printf("\n");
+ }
+
+ # Print out summaries
+ $total_direct_latency /= 1000;
+ $total_kswapd_latency /= 1000;
+ print "\nSummary\n";
+ print "Direct reclaims: $total_direct_reclaim\n";
+ print "Direct reclaim pages scanned: $total_direct_nr_scanned\n";
+ print "Direct reclaim file pages scanned: $total_direct_nr_file_scanned\n";
+ print "Direct reclaim anon pages scanned: $total_direct_nr_anon_scanned\n";
+ print "Direct reclaim pages reclaimed: $total_direct_nr_reclaimed\n";
+ print "Direct reclaim file pages reclaimed: $total_direct_nr_file_reclaimed\n";
+ print "Direct reclaim anon pages reclaimed: $total_direct_nr_anon_reclaimed\n";
+ print "Direct reclaim write file sync I/O: $total_direct_writepage_file_sync\n";
+ print "Direct reclaim write anon sync I/O: $total_direct_writepage_anon_sync\n";
+ print "Direct reclaim write file async I/O: $total_direct_writepage_file_async\n";
+ print "Direct reclaim write anon async I/O: $total_direct_writepage_anon_async\n";
+ print "Wake kswapd requests: $total_wakeup_kswapd\n";
+ printf "Time stalled direct reclaim: %-1.2f seconds\n", $total_direct_latency;
+ print "\n";
+ print "Kswapd wakeups: $total_kswapd_wake\n";
+ print "Kswapd pages scanned: $total_kswapd_nr_scanned\n";
+ print "Kswapd file pages scanned: $total_kswapd_nr_file_scanned\n";
+ print "Kswapd anon pages scanned: $total_kswapd_nr_anon_scanned\n";
+ print "Kswapd pages reclaimed: $total_kswapd_nr_reclaimed\n";
+ print "Kswapd file pages reclaimed: $total_kswapd_nr_file_reclaimed\n";
+ print "Kswapd anon pages reclaimed: $total_kswapd_nr_anon_reclaimed\n";
+ print "Kswapd reclaim write file sync I/O: $total_kswapd_writepage_file_sync\n";
+ print "Kswapd reclaim write anon sync I/O: $total_kswapd_writepage_anon_sync\n";
+ print "Kswapd reclaim write file async I/O: $total_kswapd_writepage_file_async\n";
+ print "Kswapd reclaim write anon async I/O: $total_kswapd_writepage_anon_async\n";
+ printf "Time kswapd awake: %-1.2f seconds\n", $total_kswapd_latency;
+}
+
+sub aggregate_perprocesspid() {
+ my $process_pid;
+ my $process;
+ undef %perprocess;
+
+ foreach $process_pid (keys %perprocesspid) {
+ $process = $process_pid;
+ $process =~ s/-([0-9])*$//;
+ if ($process eq '') {
+ $process = "NO_PROCESS_NAME";
+ }
+
+ $perprocess{$process}->{MM_VMSCAN_DIRECT_RECLAIM_BEGIN} += $perprocesspid{$process_pid}->{MM_VMSCAN_DIRECT_RECLAIM_BEGIN};
+ $perprocess{$process}->{MM_VMSCAN_KSWAPD_WAKE} += $perprocesspid{$process_pid}->{MM_VMSCAN_KSWAPD_WAKE};
+ $perprocess{$process}->{MM_VMSCAN_WAKEUP_KSWAPD} += $perprocesspid{$process_pid}->{MM_VMSCAN_WAKEUP_KSWAPD};
+ $perprocess{$process}->{HIGH_KSWAPD_REWAKEUP} += $perprocesspid{$process_pid}->{HIGH_KSWAPD_REWAKEUP};
+ $perprocess{$process}->{HIGH_NR_SCANNED} += $perprocesspid{$process_pid}->{HIGH_NR_SCANNED};
+ $perprocess{$process}->{HIGH_NR_FILE_SCANNED} += $perprocesspid{$process_pid}->{HIGH_NR_FILE_SCANNED};
+ $perprocess{$process}->{HIGH_NR_ANON_SCANNED} += $perprocesspid{$process_pid}->{HIGH_NR_ANON_SCANNED};
+ $perprocess{$process}->{HIGH_NR_RECLAIMED} += $perprocesspid{$process_pid}->{HIGH_NR_RECLAIMED};
+ $perprocess{$process}->{HIGH_NR_FILE_RECLAIMED} += $perprocesspid{$process_pid}->{HIGH_NR_FILE_RECLAIMED};
+ $perprocess{$process}->{HIGH_NR_ANON_RECLAIMED} += $perprocesspid{$process_pid}->{HIGH_NR_ANON_RECLAIMED};
+ $perprocess{$process}->{MM_VMSCAN_WRITEPAGE_FILE_SYNC} += $perprocesspid{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_SYNC};
+ $perprocess{$process}->{MM_VMSCAN_WRITEPAGE_ANON_SYNC} += $perprocesspid{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_SYNC};
+ $perprocess{$process}->{MM_VMSCAN_WRITEPAGE_FILE_ASYNC} += $perprocesspid{$process_pid}->{MM_VMSCAN_WRITEPAGE_FILE_ASYNC};
+ $perprocess{$process}->{MM_VMSCAN_WRITEPAGE_ANON_ASYNC} += $perprocesspid{$process_pid}->{MM_VMSCAN_WRITEPAGE_ANON_ASYNC};
+
+ for (my $order = 0; $order < 20; $order++) {
+ $perprocess{$process}->{MM_VMSCAN_DIRECT_RECLAIM_BEGIN_PERORDER}[$order] += $perprocesspid{$process_pid}->{MM_VMSCAN_DIRECT_RECLAIM_BEGIN_PERORDER}[$order];
+ $perprocess{$process}->{MM_VMSCAN_WAKEUP_KSWAPD_PERORDER}[$order] += $perprocesspid{$process_pid}->{MM_VMSCAN_WAKEUP_KSWAPD_PERORDER}[$order];
+ $perprocess{$process}->{MM_VMSCAN_KSWAPD_WAKE_PERORDER}[$order] += $perprocesspid{$process_pid}->{MM_VMSCAN_KSWAPD_WAKE_PERORDER}[$order];
+
+ }
+
+ # Aggregate direct reclaim latencies
+ my $wr_index = $perprocess{$process}->{MM_VMSCAN_DIRECT_RECLAIM_END};
+ my $rd_index = 0;
+ while (defined $perprocesspid{$process_pid}->{HIGH_DIRECT_RECLAIM_LATENCY}[$rd_index]) {
+ $perprocess{$process}->{HIGH_DIRECT_RECLAIM_LATENCY}[$wr_index] = $perprocesspid{$process_pid}->{HIGH_DIRECT_RECLAIM_LATENCY}[$rd_index];
+ $rd_index++;
+ $wr_index++;
+ }
+ $perprocess{$process}->{MM_VMSCAN_DIRECT_RECLAIM_END} = $wr_index;
+
+ # Aggregate kswapd latencies
+ my $wr_index = $perprocess{$process}->{MM_VMSCAN_KSWAPD_SLEEP};
+ my $rd_index = 0;
+ while (defined $perprocesspid{$process_pid}->{HIGH_KSWAPD_LATENCY}[$rd_index]) {
+ $perprocess{$process}->{HIGH_KSWAPD_LATENCY}[$wr_index] = $perprocesspid{$process_pid}->{HIGH_KSWAPD_LATENCY}[$rd_index];
+ $rd_index++;
+ $wr_index++;
+ }
+ $perprocess{$process}->{MM_VMSCAN_DIRECT_RECLAIM_END} = $wr_index;
+ }
+}
+
+sub report() {
+ if (!$opt_ignorepid) {
+ dump_stats(\%perprocesspid);
+ } else {
+ aggregate_perprocesspid();
+ dump_stats(\%perprocess);
+ }
+}
+
+# Process events or signals until neither is available
+sub signal_loop() {
+ my $sigint_processed;
+ do {
+ $sigint_processed = 0;
+ process_events();
+
+ # Handle pending signals if any
+ if ($sigint_pending) {
+ my $current_time = time;
+
+ if ($sigint_exit) {
+ print "Received exit signal\n";
+ $sigint_pending = 0;
+ }
+ if ($sigint_report) {
+ if ($current_time >= $sigint_received + 2) {
+ report();
+ $sigint_report = 0;
+ $sigint_pending = 0;
+ $sigint_processed = 1;
+ }
+ }
+ }
+ } while ($sigint_pending || $sigint_processed);
+}
+
+signal_loop();
+report();