Operations: NAME COUNT DUR_MIN DUR_MAX DUR_TOTAL DUR_MEAN DUR_STDDEV FREQ_MEAN FREQ_STDDEV btree_interior_update_foreground 78096 5110ns 19ms 64s 831us 158us 10ms 331us btree_interior_update_total 78107 6870ns 136s 543581s 6959ms 691ms 10ms 19us btree_node_compact 53 369us 4497us 33ms 627us 34us 15s 1877ms btree_node_mem_alloc 81383 70ns 3150us 371ms 4570ns 613ns 10ms 247us btree_node_merge 5 827us 5879us 14ms 2986us 2042us 79s 1929ms btree_node_read 3175 113us 290ms 10s 3253us 485us 107ms 379us btree_node_read_done 3175 15us 972us 1019ms 321us 98us 107ms 379us btree_node_sort 81802 40ns 6039us 3683ms 45us 10us 11ms 311us btree_node_split 6 1048us 2489us 9658us 1609us 576us 27s 3475us btree_node_write 81879 125us 136s 367234s 4485ms 201ms 32ms 854us btree_write_buffer_flush 82 2540ns 186ms 525ms 6411us 242us 4673ms 30ms btree_write_buffer_flush_shard_sched_delay 15 5560ns 2231us 7152us 476us 55us 9650ms 26us btree_write_buffer_flush_shard_work 15 525us 29ms 246ms 16ms 6283us 9649ms 3245us data_read 6 3216us 12ms 32ms 5483us 1518us 9362us 16us data_write 6 95ms 230ms 963ms 160ms 69ms 40ms 31us journal_flush_seq 9 27ms 1534ms 2764ms 307ms 50ms 674ms 70ms journal_flush_write 645 13ms 288s 347s 538ms 17ms 1411ms 358ms journal_noflush_write 177 869us 3602ms 15s 89ms 17ms 1824ms 63ms journal_pin_flush_btree 2958 280ns 515us 150ms 50us 16us 307ms 659us journal_pin_flush_key_cache 94698 270ns 5219us 402ms 4247ns 4457ns 38ms 4481ns journal_pin_flush_other 44 20ns 6260ns 13us 298ns 4ns 8578ms 1844ms Slowpath: NAME COUNT DUR_MIN DUR_MAX DUR_TOTAL DUR_MEAN DUR_STDDEV FREQ_MEAN FREQ_STDDEV blocked_journal_max_in_flight 2 168ms 134s 134s 67s 957ms 455ms 674ms Btree transactions: NAME COUNT DUR_MIN DUR_MAX DUR_TOTAL DUR_MEAN DUR_STDDEV FREQ_MEAN FREQ_STDDEV __bch2_write 6 30ns 70ns 300ns 50ns 31ns 13ms 30us __btree_node_flush 2958 30ns 13us 671us 227ns 68ns 307ms 659us async_btree_node_rewrite_work 158253 30ns 6834us 19ms 125ns 1ns 6800us 1986ns bch2_accounting_read 114 110ns 6839us 11ms 97us 148ns 98us 17us bch2_alloc_read 2637 270ns 27ms 44ms 16us 7ns 16us 7ns bch2_btree_bitmap_gc 35543 130ns 20ms 65ms 1835ns 2ns 4138ns 4ns bch2_btree_key_cache_journal_flush 94712 30ns 559us 11ms 116ns 40ns 37ms 4496ns bch2_btree_root_alloc_fake 7 30ns 230ns 410ns 58ns 28ns 1216ns 360ns bch2_btree_write_buffer_flush_work_fn 83 360ns 13ms 60ms 723us 93us 4616ms 22ms bch2_check_snapshots 2 920ns 21us 22us 11us 2045ns 21us 31us bch2_data_update_index_update 11 230ns 4230us 4276us 388us 1432ns 20ms 18us bch2_delete_dead_inodes 2 1130ns 212us 213us 106us 157us 1130ns 1675ns bch2_do_discards 102400721 40ns 40ms 77s 753ns 207ns 33us 206ns bch2_do_discards_fast_work 4 80ns 865us 888us 222us 333ns 296us 320us bch2_ec_stripe_delete_work 2 90ns 330ns 420ns 210ns 200ns 330ns 489ns bch2_get_acl 2 120ns 170ns 290ns 145ns 126ns 490ns 726ns bch2_get_name 5 130ns 610ns 1660ns 332ns 625ns 7252ns 333ns bch2_lookup 4 40ns 70ns 190ns 47ns 17ns 447us 867ns bch2_lookup_root_inode 1 230ns 230ns 230ns 0 0 0 0 bch2_moving_ctxt_init 245294 40ns 416ms 185s 758us 78ns 757us 78ns bch2_presplit_shard_boundaries 12 140ns 21ms 56ms 4693us 2042ns 5120us 2008us bch2_resume_logged_ops 2 240ns 1200ns 1440ns 720ns 533ns 1200ns 1778ns bch2_snapshots_read 2 1210ns 6470ns 7680ns 3840ns 2690ns 6470ns 9591ns bch2_trans_mark_dev_sb 15657 300ns 23ms 67ms 4297ns 111ns 4298ns 108ns bch2_vfs_inode_get 5 40ns 220ns 670ns 134ns 75ns 6870ms 3343ms btree_node_write_work 85617 30ns 134s 269s 3144us 437ns 31ms 872us btree_update_nodes_written 371041 30ns 134s 156s 421us 459ns 8878us 856ns wb_flush_shard_work 27 260ns 10ms 64ms 2380us 3459ns 5196ms 146us Per-device IO latency: NAME COUNT DUR_MIN DUR_MAX DUR_TOTAL DUR_MEAN DUR_STDDEV FREQ_MEAN FREQ_STDDEV vdb/read 31 3934us 287ms 2258ms 72ms 24ms 185ms 117ms vdb/write 83310 26us 288s 45496s 546ms 229ms 10ms 520us vdc/read 63 866us 290ms 1747ms 27ms 9247us 196ms 13ms vdc/write 83304 23us 25s 4630s 55ms 38ms 10ms 484us vdd/read 3087 65us 24ms 5296ms 1715us 408us 110ms 245us vdd/write 83391 24us 2447ms 50s 602us 172us 43ms 202us