When evaluating in f2fs, it takes much time to obtain waf data.
This patch helps to obtain waf data without calcluation.
Signed-off-by: Beomsu Kim <beomsu7....@samsung.com>
---
fs/f2fs/iostat.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/fs/f2fs/iostat.c b/fs/f2fs/iostat.c
index 3d5bfb1ad585..6ae9659d69e7 100644
--- a/fs/f2fs/iostat.c
+++ b/fs/f2fs/iostat.c
@@ -34,10 +34,22 @@ 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);
+ struct f2fs_stat_info *si = F2FS_STAT(sbi);
+ int j;
+ unsigned long long waf = 0;
+ unsigned long long data_written_to_storage = 0, data_written_by_user =
0;
if (!sbi->iostat_enable)
return 0;
+ for (j = FS_DATA_IO; j <= FS_CP_META_IO; j++)
+ data_written_to_storage += si->sbi->iostat_bytes[j];
+ for (j = FS_DATA_IO; j <= FS_CDATA_IO; j++)
+ data_written_by_user += si->sbi->iostat_bytes[j];
+
+ if (data_written_by_user > 0)
+ waf = data_written_to_storage * 100 / data_written_by_user;
+
seq_printf(seq, "time: %-16llu\n", ktime_get_real_seconds());
seq_printf(seq, "\t\t\t%-16s %-16s %-16s\n",
"io_bytes", "count", "avg_bytes");
@@ -81,6 +93,10 @@ int __maybe_unused iostat_info_seq_show(struct seq_file
*seq, void *offset)
IOSTAT_INFO_SHOW("fs discard", FS_DISCARD_IO);
IOSTAT_INFO_SHOW("fs flush", FS_FLUSH_IO);
+ /* print waf */
+ seq_puts(seq, "[WAF]\n");
+ seq_printf(seq, "fs waf: %llu.%02llu\n", waf / 100, waf
% 100);
+
return 0;
}
--
2.17.1
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
