diff options
Diffstat (limited to 'fs/f2fs/iostat.c')
| -rw-r--r-- | fs/f2fs/iostat.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/fs/f2fs/iostat.c b/fs/f2fs/iostat.c new file mode 100644 index 000000000000..21c29e121a86 --- /dev/null +++ b/fs/f2fs/iostat.c @@ -0,0 +1,154 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * f2fs iostat support + * + * Copyright 2021 Google LLC + * Author: Daeho Jeong <daehojeong@google.com> + */ + +#include <linux/fs.h> +#include <linux/f2fs_fs.h> +#include <linux/seq_file.h> + +#include "f2fs.h" +#include "iostat.h" +#include <trace/events/f2fs.h> + +int __maybe_unused iostat_info_seq_show(struct seq_file *seq, void *offset) +{ + struct super_block *sb = seq->private; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + time64_t now = ktime_get_real_seconds(); + + if (!sbi->iostat_enable) + return 0; + + seq_printf(seq, "time: %-16llu\n", now); + + /* print app write IOs */ + seq_puts(seq, "[WRITE]\n"); + seq_printf(seq, "app buffered: %-16llu\n", + sbi->rw_iostat[APP_BUFFERED_IO]); + seq_printf(seq, "app direct: %-16llu\n", + sbi->rw_iostat[APP_DIRECT_IO]); + seq_printf(seq, "app mapped: %-16llu\n", + sbi->rw_iostat[APP_MAPPED_IO]); + + /* print fs write IOs */ + seq_printf(seq, "fs data: %-16llu\n", + sbi->rw_iostat[FS_DATA_IO]); + seq_printf(seq, "fs node: %-16llu\n", + sbi->rw_iostat[FS_NODE_IO]); + seq_printf(seq, "fs meta: %-16llu\n", + sbi->rw_iostat[FS_META_IO]); + seq_printf(seq, "fs gc data: %-16llu\n", + sbi->rw_iostat[FS_GC_DATA_IO]); + seq_printf(seq, "fs gc node: %-16llu\n", + sbi->rw_iostat[FS_GC_NODE_IO]); + seq_printf(seq, "fs cp data: %-16llu\n", + sbi->rw_iostat[FS_CP_DATA_IO]); + seq_printf(seq, "fs cp node: %-16llu\n", + sbi->rw_iostat[FS_CP_NODE_IO]); + seq_printf(seq, "fs cp meta: %-16llu\n", + sbi->rw_iostat[FS_CP_META_IO]); + + /* print app read IOs */ + seq_puts(seq, "[READ]\n"); + seq_printf(seq, "app buffered: %-16llu\n", + sbi->rw_iostat[APP_BUFFERED_READ_IO]); + seq_printf(seq, "app direct: %-16llu\n", + sbi->rw_iostat[APP_DIRECT_READ_IO]); + seq_printf(seq, "app mapped: %-16llu\n", + sbi->rw_iostat[APP_MAPPED_READ_IO]); + + /* print fs read IOs */ + seq_printf(seq, "fs data: %-16llu\n", + sbi->rw_iostat[FS_DATA_READ_IO]); + seq_printf(seq, "fs gc data: %-16llu\n", + sbi->rw_iostat[FS_GDATA_READ_IO]); + seq_printf(seq, "fs compr_data: %-16llu\n", + sbi->rw_iostat[FS_CDATA_READ_IO]); + seq_printf(seq, "fs node: %-16llu\n", + sbi->rw_iostat[FS_NODE_READ_IO]); + seq_printf(seq, "fs meta: %-16llu\n", + sbi->rw_iostat[FS_META_READ_IO]); + + /* print other IOs */ + seq_puts(seq, "[OTHER]\n"); + seq_printf(seq, "fs discard: %-16llu\n", + sbi->rw_iostat[FS_DISCARD]); + + return 0; +} + +static inline void f2fs_record_iostat(struct f2fs_sb_info *sbi) +{ + unsigned long long iostat_diff[NR_IO_TYPE]; + int i; + + if (time_is_after_jiffies(sbi->iostat_next_period)) + return; + + /* Need double check under the lock */ + spin_lock(&sbi->iostat_lock); + if (time_is_after_jiffies(sbi->iostat_next_period)) { + spin_unlock(&sbi->iostat_lock); + return; + } + sbi->iostat_next_period = jiffies + + msecs_to_jiffies(sbi->iostat_period_ms); + + for (i = 0; i < NR_IO_TYPE; i++) { + iostat_diff[i] = sbi->rw_iostat[i] - + sbi->prev_rw_iostat[i]; + sbi->prev_rw_iostat[i] = sbi->rw_iostat[i]; + } + spin_unlock(&sbi->iostat_lock); + + trace_f2fs_iostat(sbi, iostat_diff); +} + +void f2fs_reset_iostat(struct f2fs_sb_info *sbi) +{ + int i; + + spin_lock(&sbi->iostat_lock); + for (i = 0; i < NR_IO_TYPE; i++) { + sbi->rw_iostat[i] = 0; + sbi->prev_rw_iostat[i] = 0; + } + spin_unlock(&sbi->iostat_lock); +} + +void f2fs_update_iostat(struct f2fs_sb_info *sbi, + enum iostat_type type, unsigned long long io_bytes) +{ + if (!sbi->iostat_enable) + return; + + spin_lock(&sbi->iostat_lock); + sbi->rw_iostat[type] += io_bytes; + + if (type == APP_WRITE_IO || type == APP_DIRECT_IO) + sbi->rw_iostat[APP_BUFFERED_IO] = + sbi->rw_iostat[APP_WRITE_IO] - + sbi->rw_iostat[APP_DIRECT_IO]; + + if (type == APP_READ_IO || type == APP_DIRECT_READ_IO) + sbi->rw_iostat[APP_BUFFERED_READ_IO] = + sbi->rw_iostat[APP_READ_IO] - + sbi->rw_iostat[APP_DIRECT_READ_IO]; + spin_unlock(&sbi->iostat_lock); + + f2fs_record_iostat(sbi); +} + +int f2fs_init_iostat(struct f2fs_sb_info *sbi) +{ + /* init iostat info */ + spin_lock_init(&sbi->iostat_lock); + sbi->iostat_enable = false; + sbi->iostat_period_ms = DEFAULT_IOSTAT_PERIOD_MS; + + return 0; +} |