* [PATCH 1/2] trace-vmscan-postprocess: sync with tracepoints updates
@ 2023-09-14 13:16 Vlastimil Babka
2023-09-14 13:16 ` [PATCH 2/2] mm, vmscan: remove ISOLATE_UNMAPPED Vlastimil Babka
0 siblings, 1 reply; 2+ messages in thread
From: Vlastimil Babka @ 2023-09-14 13:16 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, patches, linux-trace-kernel,
Hugh Dickins, Mel Gorman, Vlastimil Babka
The script has fallen behind tracepoint changes for a while, fix it up.
Most changes are mechanical (renames, removal of tracepoint parameters
that are not used by the script). More notable change involves
mm_vmscan_lru_isolate which is relying on the isolate_mode to determine
if the inactive list is being scanned. However the parameter currently
only indicates ISOLATE_UNMAPPED. We can use the lru parameter instead to
determine which list is scanned, and stop checking isolate_mode.
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
---
.../postprocess/trace-vmscan-postprocess.pl | 40 ++++++++-----------
1 file changed, 17 insertions(+), 23 deletions(-)
diff --git a/Documentation/trace/postprocess/trace-vmscan-postprocess.pl b/Documentation/trace/postprocess/trace-vmscan-postprocess.pl
index e24c009789a0..725d41a8d4ef 100644
--- a/Documentation/trace/postprocess/trace-vmscan-postprocess.pl
+++ b/Documentation/trace/postprocess/trace-vmscan-postprocess.pl
@@ -107,14 +107,14 @@ GetOptions(
);
# 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_begin_default = 'order=([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_wakeup_kswapd_default = 'nid=([0-9]*) order=([0-9]*) gfp_flags=([A-Z_|]*)';
+my $regex_lru_isolate_default = 'isolate_mode=([0-9]*) classzone=([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_anon=([0-9]*) nr_activate_file=([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_lru_shrink_active_default = 'lru=([A-Z_]*) nr_taken=([0-9]*) nr_active=([0-9]*) nr_deactivated=([0-9]*) nr_referenced=([0-9]*) priority=([0-9]*) flags=([A-Z_|]*)' ;
my $regex_writepage_default = 'page=([0-9a-f]*) pfn=([0-9]*) flags=([A-Z_|]*)';
# Dyanically discovered regex
@@ -184,8 +184,7 @@ sub generate_traceevent_regex {
$regex_direct_begin = generate_traceevent_regex(
"vmscan/mm_vmscan_direct_reclaim_begin",
$regex_direct_begin_default,
- "order", "may_writepage",
- "gfp_flags");
+ "order", "gfp_flags");
$regex_direct_end = generate_traceevent_regex(
"vmscan/mm_vmscan_direct_reclaim_end",
$regex_direct_end_default,
@@ -201,11 +200,11 @@ $regex_kswapd_sleep = generate_traceevent_regex(
$regex_wakeup_kswapd = generate_traceevent_regex(
"vmscan/mm_vmscan_wakeup_kswapd",
$regex_wakeup_kswapd_default,
- "nid", "zid", "order", "gfp_flags");
+ "nid", "order", "gfp_flags");
$regex_lru_isolate = generate_traceevent_regex(
"vmscan/mm_vmscan_lru_isolate",
$regex_lru_isolate_default,
- "isolate_mode", "classzone_idx", "order",
+ "isolate_mode", classzone", "order",
"nr_requested", "nr_scanned", "nr_skipped", "nr_taken",
"lru");
$regex_lru_shrink_inactive = generate_traceevent_regex(
@@ -218,11 +217,10 @@ $regex_lru_shrink_inactive = generate_traceevent_regex(
$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");
+ "nid", "nr_taken", "nr_active", "nr_deactivated", "nr_referenced",
+ "priority", "flags");
$regex_writepage = generate_traceevent_regex(
- "vmscan/mm_vmscan_writepage",
+ "vmscan/mm_vmscan_write_folio",
$regex_writepage_default,
"page", "pfn", "flags");
@@ -371,7 +369,7 @@ sub process_events {
print " $regex_wakeup_kswapd\n";
next;
}
- my $order = $3;
+ my $order = $2;
$perprocesspid{$process_pid}->{MM_VMSCAN_WAKEUP_KSWAPD_PERORDER}[$order]++;
} elsif ($tracepoint eq "mm_vmscan_lru_isolate") {
$details = $6;
@@ -381,18 +379,14 @@ sub process_events {
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) {
+ my $lru = $8;
+
+ # To closer match vmstat scanning statistics, only count
+ # inactive lru as scanning
+ if ($lru =~ /inactive_/) {
$perprocesspid{$process_pid}->{HIGH_NR_SCANNED} += $nr_scanned;
- if ($file =~ /_file/) {
+ if ($lru =~ /_file/) {
$perprocesspid{$process_pid}->{HIGH_NR_FILE_SCANNED} += $nr_scanned;
} else {
$perprocesspid{$process_pid}->{HIGH_NR_ANON_SCANNED} += $nr_scanned;
--
2.42.0
^ permalink raw reply [flat|nested] 2+ messages in thread
* [PATCH 2/2] mm, vmscan: remove ISOLATE_UNMAPPED
2023-09-14 13:16 [PATCH 1/2] trace-vmscan-postprocess: sync with tracepoints updates Vlastimil Babka
@ 2023-09-14 13:16 ` Vlastimil Babka
0 siblings, 0 replies; 2+ messages in thread
From: Vlastimil Babka @ 2023-09-14 13:16 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-mm, linux-kernel, patches, linux-trace-kernel,
Hugh Dickins, Mel Gorman, Vlastimil Babka
This isolate_mode_t flag is effectively unused since 89f6c88a6ab4 ("mm:
__isolate_lru_page_prepare() in isolate_migratepages_block()") as
sc->may_unmap is now checked directly (and only node_reclaim has a mode
that sets it to 0). The last remaining place is mm_vmscan_lru_isolate
tracepoint for the isolate_mode parameter. That one was mainly used to
indicate the active/inactive mode, which the trace-vmscan-postprocess.pl
script consumed, but that got silently broken. After fixing the script
by the previous patch, it does not need the isolate_mode anymore. So
just remove the parameter and with that the whole ISOLATE_UNMAPPED flag.
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
---
.../trace/postprocess/trace-vmscan-postprocess.pl | 8 ++++----
include/linux/mmzone.h | 2 --
include/trace/events/vmscan.h | 8 ++------
mm/vmscan.c | 3 +--
4 files changed, 7 insertions(+), 14 deletions(-)
diff --git a/Documentation/trace/postprocess/trace-vmscan-postprocess.pl b/Documentation/trace/postprocess/trace-vmscan-postprocess.pl
index 725d41a8d4ef..048dc0dbce64 100644
--- a/Documentation/trace/postprocess/trace-vmscan-postprocess.pl
+++ b/Documentation/trace/postprocess/trace-vmscan-postprocess.pl
@@ -112,7 +112,7 @@ 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]*) order=([0-9]*) gfp_flags=([A-Z_|]*)';
-my $regex_lru_isolate_default = 'isolate_mode=([0-9]*) classzone=([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_isolate_default = 'classzone=([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_anon=([0-9]*) nr_activate_file=([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_taken=([0-9]*) nr_active=([0-9]*) nr_deactivated=([0-9]*) nr_referenced=([0-9]*) priority=([0-9]*) flags=([A-Z_|]*)' ;
my $regex_writepage_default = 'page=([0-9a-f]*) pfn=([0-9]*) flags=([A-Z_|]*)';
@@ -204,7 +204,7 @@ $regex_wakeup_kswapd = generate_traceevent_regex(
$regex_lru_isolate = generate_traceevent_regex(
"vmscan/mm_vmscan_lru_isolate",
$regex_lru_isolate_default,
- "isolate_mode", classzone", "order",
+ "classzone", "order",
"nr_requested", "nr_scanned", "nr_skipped", "nr_taken",
"lru");
$regex_lru_shrink_inactive = generate_traceevent_regex(
@@ -379,8 +379,8 @@ sub process_events {
print " $regex_lru_isolate/o\n";
next;
}
- my $nr_scanned = $5;
- my $lru = $8;
+ my $nr_scanned = $4;
+ my $lru = $7;
# To closer match vmstat scanning statistics, only count
# inactive lru as scanning
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 4106fbc5b4b3..486587fcd27f 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -639,8 +639,6 @@ struct lruvec {
#endif
};
-/* Isolate unmapped pages */
-#define ISOLATE_UNMAPPED ((__force isolate_mode_t)0x2)
/* Isolate for asynchronous migration */
#define ISOLATE_ASYNC_MIGRATE ((__force isolate_mode_t)0x4)
/* Isolate unevictable pages */
diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h
index d2123dd960d5..1a488c30afa5 100644
--- a/include/trace/events/vmscan.h
+++ b/include/trace/events/vmscan.h
@@ -285,10 +285,9 @@ TRACE_EVENT(mm_vmscan_lru_isolate,
unsigned long nr_scanned,
unsigned long nr_skipped,
unsigned long nr_taken,
- isolate_mode_t isolate_mode,
int lru),
- TP_ARGS(highest_zoneidx, order, nr_requested, nr_scanned, nr_skipped, nr_taken, isolate_mode, lru),
+ TP_ARGS(highest_zoneidx, order, nr_requested, nr_scanned, nr_skipped, nr_taken, lru),
TP_STRUCT__entry(
__field(int, highest_zoneidx)
@@ -297,7 +296,6 @@ TRACE_EVENT(mm_vmscan_lru_isolate,
__field(unsigned long, nr_scanned)
__field(unsigned long, nr_skipped)
__field(unsigned long, nr_taken)
- __field(unsigned int, isolate_mode)
__field(int, lru)
),
@@ -308,7 +306,6 @@ TRACE_EVENT(mm_vmscan_lru_isolate,
__entry->nr_scanned = nr_scanned;
__entry->nr_skipped = nr_skipped;
__entry->nr_taken = nr_taken;
- __entry->isolate_mode = (__force unsigned int)isolate_mode;
__entry->lru = lru;
),
@@ -316,8 +313,7 @@ TRACE_EVENT(mm_vmscan_lru_isolate,
* classzone is previous name of the highest_zoneidx.
* Reason not to change it is the ABI requirement of the tracepoint.
*/
- TP_printk("isolate_mode=%d classzone=%d order=%d nr_requested=%lu nr_scanned=%lu nr_skipped=%lu nr_taken=%lu lru=%s",
- __entry->isolate_mode,
+ TP_printk("classzone=%d order=%d nr_requested=%lu nr_scanned=%lu nr_skipped=%lu nr_taken=%lu lru=%s",
__entry->highest_zoneidx,
__entry->order,
__entry->nr_requested,
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 6f13394b112e..f2e5e992fefb 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2389,8 +2389,7 @@ static unsigned long isolate_lru_folios(unsigned long nr_to_scan,
}
*nr_scanned = total_scan;
trace_mm_vmscan_lru_isolate(sc->reclaim_idx, sc->order, nr_to_scan,
- total_scan, skipped, nr_taken,
- sc->may_unmap ? 0 : ISOLATE_UNMAPPED, lru);
+ total_scan, skipped, nr_taken, lru);
update_lru_sizes(lruvec, lru, nr_zone_taken);
return nr_taken;
}
--
2.42.0
^ permalink raw reply [flat|nested] 2+ messages in thread
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