From: Baolin Wang <baolin.wang@linux.alibaba.com>
To: akpm@linux-foundation.org, ying.huang@intel.com,
dave.hansen@linux.intel.com
Cc: ziy@nvidia.com, shy828301@gmail.com,
baolin.wang@linux.alibaba.com, zhongjiang-ali@linux.alibaba.com,
xlpang@linux.alibaba.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: [RFC PATCH 3/4] mm: Add speculative numa fault stats
Date: Sun, 12 Dec 2021 19:31:59 +0800 [thread overview]
Message-ID: <bb19a1a3997a2424d13da02c6e7297e624e09a4f.1639306956.git.baolin.wang@linux.alibaba.com> (raw)
In-Reply-To: <cover.1639306956.git.baolin.wang@linux.alibaba.com>
In-Reply-To: <cover.1639306956.git.baolin.wang@linux.alibaba.com>
Add a new statistic to help to tune the speculative numa fault window.
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
---
include/linux/vm_event_item.h | 1 +
mm/memory.c | 2 ++
mm/vmstat.c | 1 +
3 files changed, 4 insertions(+)
diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h
index a185cc75ff52..97cdc661b7da 100644
--- a/include/linux/vm_event_item.h
+++ b/include/linux/vm_event_item.h
@@ -62,6 +62,7 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
THP_MIGRATION_SUCCESS,
THP_MIGRATION_FAIL,
THP_MIGRATION_SPLIT,
+ PGMIGRATE_SPECULATION,
#endif
#ifdef CONFIG_COMPACTION
COMPACTMIGRATE_SCANNED, COMPACTFREE_SCANNED,
diff --git a/mm/memory.c b/mm/memory.c
index a0f4a2a008cc..91122beb6e53 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4572,6 +4572,8 @@ static vm_fault_t do_numa_page(struct vm_fault *vmf)
if (migrate_misplaced_page(page, vma, target_nid)) {
page_nid = target_nid;
flags |= TNF_MIGRATED;
+ if (vmf->address != fault_address)
+ count_vm_events(PGMIGRATE_SPECULATION, 1);
} else {
flags |= TNF_MIGRATE_FAIL;
vmf->pte = pte_offset_map(vmf->pmd, fault_address);
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 787a012de3e2..c64700994786 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1314,6 +1314,7 @@ const char * const vmstat_text[] = {
"thp_migration_success",
"thp_migration_fail",
"thp_migration_split",
+ "pgmigrate_speculation",
#endif
#ifdef CONFIG_COMPACTION
"compact_migrate_scanned",
--
2.27.0
next prev parent reply other threads:[~2021-12-12 11:32 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-12 11:31 [RFC PATCH 0/4] Add speculative numa fault support Baolin Wang
2021-12-12 11:31 ` [RFC PATCH 1/4] mm: " Baolin Wang
2021-12-12 11:31 ` [RFC PATCH 2/4] mm: Add a debug interface to control the range of speculative numa fault Baolin Wang
2021-12-12 11:31 ` Baolin Wang [this message]
2021-12-12 11:32 ` [RFC PATCH 4/4] mm: Update the speculative pages' accessing time Baolin Wang
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