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Thu, 21 Sep 2023 06:19:44 +0000 (GMT) Received: from epsmgms1p1new.samsung.com (unknown [182.195.42.41]) by epsmtrp2.samsung.com (KnoxPortal) with ESMTP id 20230921061944epsmtrp2ac12d2c49dd394b444e84e6ee537632f~G1Z4jmSC-0762207622epsmtrp29; Thu, 21 Sep 2023 06:19:44 +0000 (GMT) X-AuditID: b6c32a35-50fff7000000271c-91-650be081c968 Received: from epsmtip1.samsung.com ( [182.195.34.30]) by epsmgms1p1new.samsung.com (Symantec Messaging Gateway) with SMTP id 40.02.08742.080EB056; Thu, 21 Sep 2023 15:19:44 +0900 (KST) Received: from jaewon-linux.10.32.193.11 (unknown [10.253.104.99]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20230921061944epsmtip185f493ca9c43ba7d268ba45508fee6ef~G1Z4YHAxs2652326523epsmtip1W; Thu, 21 Sep 2023 06:19:44 +0000 (GMT) From: Jaewon Kim To: rostedt@goodmis.org, yuzhao@google.com, tjmercier@google.com, kaleshsingh@google.com, akpm@linux-foundation.org, vbabka@suse.cz, hannes@cmpxchg.org Cc: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-mm@kvack.org, jaewon31.kim@gmail.com, Jaewon Kim Subject: [PATCH v2] vmscan: add trace events for lru_gen Date: Thu, 21 Sep 2023 15:22:06 +0900 Message-Id: <20230921062206.14429-1-jaewon31.kim@samsung.com> X-Mailer: git-send-email 2.17.1 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrNKsWRmVeSWpSXmKPExsWy7bCmnm7jA+5Ug/+NQhZz1q9hs1i9ydei e/NMRove96+YLJr2zWS3uLxrDpvFvTX/WS2OrD/LYrGv4wGTxbv1X9gsZjf2MVq8m/CF1YHH 4/Cb98weO2fdZfdo2XeL3WPBplKPTZ8msXucmPGbxaNvyypGjzMLjrB7fN4kF8AZlW2TkZqY klqkkJqXnJ+SmZduq+QdHO8cb2pmYKhraGlhrqSQl5ibaqvk4hOg65aZA3SxkkJZYk4pUCgg sbhYSd/Opii/tCRVISO/uMRWKbUgJafArECvODG3uDQvXS8vtcTK0MDAyBSoMCE749udNywF fx0rjvZ+Y29gXGbexcjJISFgIjFrxm32LkYuDiGBHYwSB69fgnI+MUqsuL+BGcL5xiixedYc NpiWG69eQlXtZZT48v41I4TznVHi8ebVjCBVbALaEu8XTGIFSYgIzGaUOHvqOwuIwwzivN9w CWyWsICFRPf6/+wgNouAqsTj+dPA4rwCthJvL7xhhtgnL7F6wwEo+yu7xNkmGwjbReLutyWM ELawxKvjW9ghbCmJz+/2Qt2aL3Hh4iumLkYOILtGYuFEQ4iwvcSurzNYQcLMApoS63fpQ4QV JXb+ngs2kVmAT+Ld1x5WiE5eiY42IYgSNYmWZ19ZIWwZib//nkHZHhKzX91mArGFBGIlJr5+ yDiBUXYWwoIFjIyrGMVSC4pz01OLDQsM4bGUnJ+7iRGcCrVMdzBOfPtB7xAjEwfjIUYJDmYl Ed7kT1ypQrwpiZVVqUX58UWlOanFhxhNgaE1kVlKNDkfmIzzSuINTSwNTMyMTCyMLY3NlMR5 mR/1pggJpCeWpGanphakFsH0MXFwSjUwGYfZ1bzlXOJ9Zt+Tfq/LK7kmaF8wNfScvoX9nZtn 9tamaJ+TuxPnN5bf38e5wteufu93l6CpE6T8NENVxDc2v5Y94P58z3WGLi/73ELvnfsf/jFq 3xJc8OSXB2vAA6ldx2VOCRSeOWRxTvr0V0/mox7Fl6YrRbm+miC+SPy5wh1VbT7F8uoNRgtl ddjXvcuW3yos+kFdUHTbyvLFz/maWdNPBB/1YV61ujtvWVtz5HrnV2uSPkbNn+jXGqvfuv5j t4Cr4r5F09WypnTJVDKatf1ZEqg/5+O5TUlbS847ZpyunypexSwbkXPy06FnkVvmz9v2ZPoR j8TDmgHBjzIzf0rckJp/zvnULeZ/d699VGIpzkg01GIuKk4EALWaihYOBAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrJLMWRmVeSWpSXmKPExsWy7bCSnG7DA+5Ug+MnjS3mrF/DZrF6k69F 9+aZjBa9718xWTTtm8lucXnXHDaLe2v+s1ocWX+WxWJfxwMmi3frv7BZzG7sY7R4N+ELqwOP x+E375k9ds66y+7Rsu8Wu8eCTaUemz5NYvc4MeM3i0ffllWMHmcWHGH3+LxJLoAzissmJTUn syy1SN8ugSvj2503LAV/HSuO9n5jb2BcZt7FyMkhIWAicePVS3YQW0hgN6PEubcGEHEZiTfn n7J0MXIA2cIShw8XdzFyAZV8ZZQ4//MmI0gNm4C2xPsFk1hBEiICixklHl9rYwVJMAvMZ5R4 MCUAxBYWsJDoXv8fbAGLgKrE4/nT2EBsXgFbibcX3jBDLJOXWL3hAPMERp4FjAyrGCVTC4pz 03OLDQsM81LL9YoTc4tL89L1kvNzNzGCQ1NLcwfj9lUf9A4xMnEwHmKU4GBWEuFN/sSVKsSb klhZlVqUH19UmpNafIhRmoNFSZxX/EVvipBAemJJanZqakFqEUyWiYNTqoFJcqHLrsKXZz79 /tq4oSr2Fc+S1nK9O84F4XouHkb/f2Vt5nnd4hNiYbjpT8kUldvTr0zV4NoYV/GcefKfTI7W eddcykx8jVbfXqD3/V7i3h3x7T394u11RVw33T5O7Aje/oH7aam18B+vTwU8r9pnW4UeCz9e Mlc/3nhDktn1Ezfy5OQDym6v21z/MyFEY6aNtZp2kka3Oh/nXtv6Ze+Ez+gYb7hU8m1upTD7 1ymOl87I8fYdnqk+z6D1YuKWmQcFRRcfY3v5Wm4LN992l8vfZKq3/b1ecNU7ZGWztOn2h/P5 DA6xT50/58Vf48BLJ+1yQ3hs/rzf07Zw0nQeGY9/az8wlh82mVtx4evjgFldSizFGYmGWsxF xYkA6MA8NrwCAAA= X-CMS-MailID: 20230921061944epcas1p2f8a022282709da12840b33c0f5898b5f X-Msg-Generator: CA X-Sendblock-Type: SVC_REQ_APPROVE CMS-TYPE: 101P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20230921061944epcas1p2f8a022282709da12840b33c0f5898b5f References: X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL, SPF_HELO_PASS,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: As the legacy lru provides, the lru_gen needs some trace events for debugging. This commit introduces 2 trace events. trace_mm_vmscan_lru_gen_scan trace_mm_vmscan_lru_gen_evict Each event is similar to the following legacy events. trace_mm_vmscan_lru_isolate, trace_mm_vmscan_lru_shrink_[in]active Here's an example mm_vmscan_lru_gen_scan: isolate_mode=0 classzone=1 order=9 nr_requested=4096 nr_scanned=431 nr_skipped=0 nr_taken=55 lru=anon mm_vmscan_lru_gen_evict: nid=0 nr_reclaimed=42 nr_dirty=0 nr_writeback=0 nr_congested=0 nr_immediate=0 nr_activate_anon=13 nr_activate_file=0 nr_ref_keep=0 nr_unmap_fail=0 priority=2 flags=RECLAIM_WB_ANON|RECLAIM_WB_ASYNC mm_vmscan_lru_gen_scan: isolate_mode=0 classzone=1 order=9 nr_requested=4096 nr_scanned=66 nr_skipped=0 nr_taken=64 lru=file mm_vmscan_lru_gen_evict: nid=0 nr_reclaimed=62 nr_dirty=0 nr_writeback=0 nr_congested=0 nr_immediate=0 nr_activate_anon=0 nr_activate_file=2 nr_ref_keep=0 nr_unmap_fail=0 priority=2 flags=RECLAIM_WB_FILE|RECLAIM_WB_ASYNC Signed-off-by: Jaewon Kim Reviewed-by: T.J. Mercier --- v2: use condition and make it aligned v1: introduce trace events --- include/trace/events/mmflags.h | 5 ++ include/trace/events/vmscan.h | 98 ++++++++++++++++++++++++++++++++++ mm/vmscan.c | 17 ++++-- 3 files changed, 115 insertions(+), 5 deletions(-) diff --git a/include/trace/events/mmflags.h b/include/trace/events/mmflags.h index 1478b9dd05fa..44e9b38f83e7 100644 --- a/include/trace/events/mmflags.h +++ b/include/trace/events/mmflags.h @@ -274,6 +274,10 @@ IF_HAVE_VM_SOFTDIRTY(VM_SOFTDIRTY, "softdirty" ) \ EM (LRU_ACTIVE_FILE, "active_file") \ EMe(LRU_UNEVICTABLE, "unevictable") +#define LRU_GEN_NAMES \ + EM (LRU_GEN_ANON, "anon") \ + EMe(LRU_GEN_FILE, "file") + /* * First define the enums in the above macros to be exported to userspace * via TRACE_DEFINE_ENUM(). @@ -288,6 +292,7 @@ COMPACTION_PRIORITY /* COMPACTION_FEEDBACK are defines not enums. Not needed here. */ ZONE_TYPE LRU_NAMES +LRU_GEN_NAMES /* * Now redefine the EM() and EMe() macros to map the enums to the strings diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h index d2123dd960d5..f0c3a4bd72db 100644 --- a/include/trace/events/vmscan.h +++ b/include/trace/events/vmscan.h @@ -327,6 +327,57 @@ TRACE_EVENT(mm_vmscan_lru_isolate, __print_symbolic(__entry->lru, LRU_NAMES)) ); +TRACE_EVENT_CONDITION(mm_vmscan_lru_gen_scan, + TP_PROTO(int highest_zoneidx, + int order, + unsigned long nr_requested, + 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_CONDITION(nr_scanned), + + TP_STRUCT__entry( + __field(int, highest_zoneidx) + __field(int, order) + __field(unsigned long, nr_requested) + __field(unsigned long, nr_scanned) + __field(unsigned long, nr_skipped) + __field(unsigned long, nr_taken) + __field(unsigned int, isolate_mode) + __field(int, lru) + ), + + TP_fast_assign( + __entry->highest_zoneidx = highest_zoneidx; + __entry->order = order; + __entry->nr_requested = nr_requested; + __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; + ), + + /* + * 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, + __entry->highest_zoneidx, + __entry->order, + __entry->nr_requested, + __entry->nr_scanned, + __entry->nr_skipped, + __entry->nr_taken, + __print_symbolic(__entry->lru, LRU_GEN_NAMES)) +); + TRACE_EVENT(mm_vmscan_write_folio, TP_PROTO(struct folio *folio), @@ -437,6 +488,53 @@ TRACE_EVENT(mm_vmscan_lru_shrink_active, show_reclaim_flags(__entry->reclaim_flags)) ); +TRACE_EVENT(mm_vmscan_lru_gen_evict, + + TP_PROTO(int nid, unsigned long nr_reclaimed, + struct reclaim_stat *stat, int priority, int file), + + TP_ARGS(nid, nr_reclaimed, stat, priority, file), + + TP_STRUCT__entry( + __field(unsigned long, nr_reclaimed) + __field(unsigned long, nr_dirty) + __field(unsigned long, nr_writeback) + __field(unsigned long, nr_congested) + __field(unsigned long, nr_immediate) + __field(unsigned int, nr_activate0) + __field(unsigned int, nr_activate1) + __field(unsigned long, nr_ref_keep) + __field(unsigned long, nr_unmap_fail) + __field(int, nid) + __field(int, priority) + __field(int, reclaim_flags) + ), + + TP_fast_assign( + __entry->nid = nid; + __entry->nr_reclaimed = nr_reclaimed; + __entry->nr_dirty = stat->nr_dirty; + __entry->nr_writeback = stat->nr_writeback; + __entry->nr_congested = stat->nr_congested; + __entry->nr_immediate = stat->nr_immediate; + __entry->nr_activate0 = stat->nr_activate[0]; + __entry->nr_activate1 = stat->nr_activate[1]; + __entry->nr_ref_keep = stat->nr_ref_keep; + __entry->nr_unmap_fail = stat->nr_unmap_fail; + __entry->priority = priority; + __entry->reclaim_flags = trace_reclaim_flags(file); + ), + + TP_printk("nid=%d nr_reclaimed=%ld nr_dirty=%ld nr_writeback=%ld nr_congested=%ld nr_immediate=%ld nr_activate_anon=%d nr_activate_file=%d nr_ref_keep=%ld nr_unmap_fail=%ld priority=%d flags=%s", + __entry->nid, __entry->nr_reclaimed, + __entry->nr_dirty, __entry->nr_writeback, + __entry->nr_congested, __entry->nr_immediate, + __entry->nr_activate0, __entry->nr_activate1, + __entry->nr_ref_keep, __entry->nr_unmap_fail, + __entry->priority, + show_reclaim_flags(__entry->reclaim_flags)) +); + TRACE_EVENT(mm_vmscan_node_reclaim_begin, TP_PROTO(int nid, int order, gfp_t gfp_flags), diff --git a/mm/vmscan.c b/mm/vmscan.c index 6f13394b112e..f453a0f8ceef 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -5005,6 +5005,7 @@ static int scan_folios(struct lruvec *lruvec, struct scan_control *sc, int sorted = 0; int scanned = 0; int isolated = 0; + int skipped = 0; int remaining = MAX_LRU_BATCH; struct lru_gen_folio *lrugen = &lruvec->lrugen; struct mem_cgroup *memcg = lruvec_memcg(lruvec); @@ -5018,7 +5019,7 @@ static int scan_folios(struct lruvec *lruvec, struct scan_control *sc, for (i = MAX_NR_ZONES; i > 0; i--) { LIST_HEAD(moved); - int skipped = 0; + int skipped_zone = 0; int zone = (sc->reclaim_idx + i) % MAX_NR_ZONES; struct list_head *head = &lrugen->folios[gen][type][zone]; @@ -5040,16 +5041,17 @@ static int scan_folios(struct lruvec *lruvec, struct scan_control *sc, isolated += delta; } else { list_move(&folio->lru, &moved); - skipped += delta; + skipped_zone += delta; } - if (!--remaining || max(isolated, skipped) >= MIN_LRU_BATCH) + if (!--remaining || max(isolated, skipped_zone) >= MIN_LRU_BATCH) break; } - if (skipped) { + if (skipped_zone) { list_splice(&moved, head); - __count_zid_vm_events(PGSCAN_SKIP, zone, skipped); + __count_zid_vm_events(PGSCAN_SKIP, zone, skipped_zone); + skipped += skipped_zone; } if (!remaining || isolated >= MIN_LRU_BATCH) @@ -5065,6 +5067,9 @@ static int scan_folios(struct lruvec *lruvec, struct scan_control *sc, __count_memcg_events(memcg, PGREFILL, sorted); __count_vm_events(PGSCAN_ANON + type, isolated); + trace_mm_vmscan_lru_gen_scan(sc->reclaim_idx, sc->order, MAX_LRU_BATCH, + scanned, skipped, isolated, + sc->may_unmap ? 0 : ISOLATE_UNMAPPED, type); /* * There might not be eligible folios due to reclaim_idx. Check the * remaining to prevent livelock if it's not making progress. @@ -5194,6 +5199,8 @@ static int evict_folios(struct lruvec *lruvec, struct scan_control *sc, int swap retry: reclaimed = shrink_folio_list(&list, pgdat, sc, &stat, false); sc->nr_reclaimed += reclaimed; + trace_mm_vmscan_lru_gen_evict(pgdat->node_id, reclaimed, &stat, + sc->priority, type); list_for_each_entry_safe_reverse(folio, next, &list, lru) { if (!folio_evictable(folio)) {