5697d55978
Tracing points are:
mm_event types
MM: Page fault -
F2FS: read metadata in F2FS |
F2FS: alloc_bio in F2FS | - - - -
F2FS: merge bios in F2FS | | | | |
BLOCK: submit_bio | | | | - blk_read_submit_bio
BLOCK: IO scheduler/SCSI | | | |
UFS: ufshcd_queuecommand | | | - ufs_read_queue_cmd
UFS: resume/ungating | | |
UFS: IO completion | | - ufs_read_compl_cmd
BLOCK: softirq | |
F2FS: read_end_io in F2FS | - f2fs_read_data
MM: end of page fauilt - maj_flt
For example,
> cat /d/tracing/instances/pixel-trace/trace_pipe
<...>-8364 [000] .... 5858.525417: mm_event_record: blk_read_submit_bio count=1 avg_lat=5 max_lat=5
<...>-8364 [000] .... 5858.525418: mm_event_record: ufs_read_queue_cmd count=1 avg_lat=96 max_lat=96
<...>-8364 [000] .... 5858.525418: mm_event_record: ufs_read_send_cmd count=1 avg_lat=143 max_lat=143
...
sitor-13079 [007] .... 5858.827375: mm_event_record: ufs_read_compl_cmd count=1 avg_lat=12545 max_lat=12545
sitor-13079 [007] .... 5858.827433: mm_event_record: f2fs_read_data count=1 avg_lat=12587 max_lat=12587
...
<...>-13174 [001] .... 5859.187505: mm_event_record: maj_flt count=1 avg_lat=12677 max_lat=12677
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
Change-Id: I0712f543212a14ab2b1d6f092a9a2a7e3ed9f0a0
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_MM_EVENT_H
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#define _LINUX_MM_EVENT_H
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/*
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* These enums are exposed to userspace via the ftrace trace_pipe_raw endpoint
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* and are an ABI. Userspace tools depend on them.
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*/
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enum mm_event_type {
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MM_MIN_FAULT = 0,
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MM_MAJ_FAULT = 1,
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MM_READ_IO = 2,
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MM_COMPACTION = 3,
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MM_RECLAIM = 4,
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MM_SWP_FAULT = 5,
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MM_KERN_ALLOC = 6,
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BLK_READ_SUBMIT_BIO = 7,
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UFS_READ_QUEUE_CMD = 8,
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UFS_READ_SEND_CMD = 9,
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UFS_READ_COMPL_CMD = 10,
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F2FS_READ_DATA = 11,
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MM_TYPE_NUM = 12,
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};
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struct mm_event_task {
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unsigned int count;
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unsigned int max_lat;
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u64 accm_lat;
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} __attribute__ ((packed));
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struct mm_event_vmstat {
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unsigned long free;
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unsigned long file;
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unsigned long anon;
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unsigned long ion;
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unsigned long slab;
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unsigned long ws_refault;
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unsigned long ws_activate;
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unsigned long mapped;
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unsigned long pgin;
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unsigned long pgout;
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unsigned long swpin;
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unsigned long swpout;
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unsigned long reclaim_steal;
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unsigned long reclaim_scan;
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unsigned long compact_scan;
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};
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#ifdef CONFIG_MM_EVENT_STAT
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void mm_event_task_init(struct task_struct *tsk);
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void mm_event_start(ktime_t *time);
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void mm_event_end(enum mm_event_type event, ktime_t start);
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void mm_event_count(enum mm_event_type event, int count);
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#else
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static inline void mm_event_task_init(struct task_struct *tsk) {}
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static inline void mm_event_start(ktime_t *time) {}
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static inline void mm_event_end(enum mm_event_type event, ktime_t start) {}
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static inline void mm_event_count(enum mm_event_type event, int count) {}
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#endif /* _LINUX_MM_EVENT_H */
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#endif
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