Re: [PATCH v2] f2fs: iostat: support accounting compressed IO

From: Chao Yu
Date: Thu Aug 11 2022 - 21:21:09 EST

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Jaegeuk,

Any comments on this patch?

On 2022/8/7 18:49, Chao Yu wrote:

From: Chao Yu <chao.yu@xxxxxxxx>

Previously, we supported to account FS_CDATA_READ_IO type IO only,
in this patch, it adds to account more type IO for compressed file:
- APP_BUFFERED_CDATA_IO
- APP_MAPPED_CDATA_IO
- FS_CDATA_IO
- APP_BUFFERED_CDATA_READ_IO
- APP_MAPPED_CDATA_READ_IO

Signed-off-by: Chao Yu <chao.yu@xxxxxxxx>
---
v2:
- fix to update write count of compressed blocks correctly.
fs/f2fs/f2fs.h | 5 ++++
fs/f2fs/file.c | 27 ++++++++++++++++----
fs/f2fs/iostat.c | 50 ++++++++++++++++++++++---------------
fs/f2fs/segment.c | 2 ++
include/trace/events/f2fs.h | 24 ++++++++++++++----
5 files changed, 78 insertions(+), 30 deletions(-)

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index eddfd35eadb6..a015935b55dd 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1158,7 +1158,10 @@ enum iostat_type {
APP_BUFFERED_IO, /* app buffered write IOs */
APP_WRITE_IO, /* app write IOs */
APP_MAPPED_IO, /* app mapped IOs */
+ APP_BUFFERED_CDATA_IO, /* app buffered write IOs on compressed file */
+ APP_MAPPED_CDATA_IO, /* app mapped write IOs on compressed file */
FS_DATA_IO, /* data IOs from kworker/fsync/reclaimer */
+ FS_CDATA_IO, /* data IOs from kworker/fsync/reclaimer on compressed file */
FS_NODE_IO, /* node IOs from kworker/fsync/reclaimer */
FS_META_IO, /* meta IOs from kworker/reclaimer */
FS_GC_DATA_IO, /* data IOs from forground gc */
@@ -1172,6 +1175,8 @@ enum iostat_type {
APP_BUFFERED_READ_IO, /* app buffered read IOs */
APP_READ_IO, /* app read IOs */
APP_MAPPED_READ_IO, /* app mapped read IOs */
+ APP_BUFFERED_CDATA_READ_IO, /* app buffered read IOs on compressed file */
+ APP_MAPPED_CDATA_READ_IO, /* app mapped read IOs on compressed file */
FS_DATA_READ_IO, /* data read IOs */
FS_GDATA_READ_IO, /* data read IOs from background gc */
FS_CDATA_READ_IO, /* compressed data read IOs */
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 24f5b02c78e7..bd45464001b6 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -42,9 +42,14 @@ static vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf)
vm_fault_t ret;
ret = filemap_fault(vmf);
- if (!ret)
- f2fs_update_iostat(F2FS_I_SB(inode), APP_MAPPED_READ_IO,
+ if (!ret) {
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+
+ f2fs_update_iostat(sbi, APP_MAPPED_READ_IO, F2FS_BLKSIZE);
+ if (f2fs_compressed_file(inode))
+ f2fs_update_iostat(sbi, APP_MAPPED_CDATA_READ_IO,
F2FS_BLKSIZE);
+ }
trace_f2fs_filemap_fault(inode, vmf->pgoff, (unsigned long)ret);
@@ -155,6 +160,8 @@ static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
SetPageUptodate(page);
f2fs_update_iostat(sbi, APP_MAPPED_IO, F2FS_BLKSIZE);
+ if (f2fs_compressed_file(inode))
+ f2fs_update_iostat(sbi, APP_MAPPED_CDATA_IO, F2FS_BLKSIZE);
f2fs_update_time(sbi, REQ_TIME);
trace_f2fs_vm_page_mkwrite(page, DATA);
@@ -4306,8 +4313,14 @@ static ssize_t f2fs_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
ret = f2fs_dio_read_iter(iocb, to);
} else {
ret = filemap_read(iocb, to, 0);
- if (ret > 0)
- f2fs_update_iostat(F2FS_I_SB(inode), APP_BUFFERED_READ_IO, ret);
+ if (ret > 0) {
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+
+ f2fs_update_iostat(sbi, APP_BUFFERED_READ_IO, ret);
+ if (f2fs_compressed_file(inode))
+ f2fs_update_iostat(sbi,
+ APP_BUFFERED_CDATA_READ_IO, ret);
+ }
}
if (trace_f2fs_dataread_end_enabled())
trace_f2fs_dataread_end(inode, pos, ret);
@@ -4423,8 +4436,12 @@ static ssize_t f2fs_buffered_write_iter(struct kiocb *iocb,
current->backing_dev_info = NULL;
if (ret > 0) {
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+
iocb->ki_pos += ret;
- f2fs_update_iostat(F2FS_I_SB(inode), APP_BUFFERED_IO, ret);
+ f2fs_update_iostat(sbi, APP_BUFFERED_IO, ret);
+ if (f2fs_compressed_file(inode))
+ f2fs_update_iostat(sbi, APP_BUFFERED_CDATA_IO, ret);
}
return ret;
}
diff --git a/fs/f2fs/iostat.c b/fs/f2fs/iostat.c
index d84c5f6cc09d..b46a6c65d8fd 100644
--- a/fs/f2fs/iostat.c
+++ b/fs/f2fs/iostat.c
@@ -31,55 +31,65 @@ int __maybe_unused iostat_info_seq_show(struct seq_file *seq, void *offset)
/* print app write IOs */
seq_puts(seq, "[WRITE]\n");
- seq_printf(seq, "app buffered: %-16llu\n",
+ seq_printf(seq, "app buffered data: %-16llu\n",
sbi->rw_iostat[APP_BUFFERED_IO]);
- seq_printf(seq, "app direct: %-16llu\n",
+ seq_printf(seq, "app direct data: %-16llu\n",
sbi->rw_iostat[APP_DIRECT_IO]);
- seq_printf(seq, "app mapped: %-16llu\n",
+ seq_printf(seq, "app mapped data: %-16llu\n",
sbi->rw_iostat[APP_MAPPED_IO]);
+ seq_printf(seq, "app buffered cdata: %-16llu\n",
+ sbi->rw_iostat[APP_BUFFERED_CDATA_IO]);
+ seq_printf(seq, "app mapped cdata: %-16llu\n",
+ sbi->rw_iostat[APP_MAPPED_CDATA_IO]);
/* print fs write IOs */
- seq_printf(seq, "fs data: %-16llu\n",
+ seq_printf(seq, "fs data: %-16llu\n",
sbi->rw_iostat[FS_DATA_IO]);
- seq_printf(seq, "fs node: %-16llu\n",
+ seq_printf(seq, "fs cdata: %-16llu\n",
+ sbi->rw_iostat[FS_CDATA_IO]);
+ seq_printf(seq, "fs node: %-16llu\n",
sbi->rw_iostat[FS_NODE_IO]);
- seq_printf(seq, "fs meta: %-16llu\n",
+ seq_printf(seq, "fs meta: %-16llu\n",
sbi->rw_iostat[FS_META_IO]);
- seq_printf(seq, "fs gc data: %-16llu\n",
+ seq_printf(seq, "fs gc data: %-16llu\n",
sbi->rw_iostat[FS_GC_DATA_IO]);
- seq_printf(seq, "fs gc node: %-16llu\n",
+ seq_printf(seq, "fs gc node: %-16llu\n",
sbi->rw_iostat[FS_GC_NODE_IO]);
- seq_printf(seq, "fs cp data: %-16llu\n",
+ seq_printf(seq, "fs cp data: %-16llu\n",
sbi->rw_iostat[FS_CP_DATA_IO]);
- seq_printf(seq, "fs cp node: %-16llu\n",
+ seq_printf(seq, "fs cp node: %-16llu\n",
sbi->rw_iostat[FS_CP_NODE_IO]);
- seq_printf(seq, "fs cp meta: %-16llu\n",
+ 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",
+ seq_printf(seq, "app buffered data: %-16llu\n",
sbi->rw_iostat[APP_BUFFERED_READ_IO]);
- seq_printf(seq, "app direct: %-16llu\n",
+ seq_printf(seq, "app direct data: %-16llu\n",
sbi->rw_iostat[APP_DIRECT_READ_IO]);
- seq_printf(seq, "app mapped: %-16llu\n",
+ seq_printf(seq, "app mapped data: %-16llu\n",
sbi->rw_iostat[APP_MAPPED_READ_IO]);
+ seq_printf(seq, "app buffered cdata: %-16llu\n",
+ sbi->rw_iostat[APP_BUFFERED_CDATA_READ_IO]);
+ seq_printf(seq, "app mapped cdata: %-16llu\n",
+ sbi->rw_iostat[APP_MAPPED_CDATA_READ_IO]);
/* print fs read IOs */
- seq_printf(seq, "fs data: %-16llu\n",
+ seq_printf(seq, "fs data: %-16llu\n",
sbi->rw_iostat[FS_DATA_READ_IO]);
- seq_printf(seq, "fs gc data: %-16llu\n",
+ seq_printf(seq, "fs gc data: %-16llu\n",
sbi->rw_iostat[FS_GDATA_READ_IO]);
- seq_printf(seq, "fs compr_data: %-16llu\n",
+ seq_printf(seq, "fs cdata: %-16llu\n",
sbi->rw_iostat[FS_CDATA_READ_IO]);
- seq_printf(seq, "fs node: %-16llu\n",
+ seq_printf(seq, "fs node: %-16llu\n",
sbi->rw_iostat[FS_NODE_READ_IO]);
- seq_printf(seq, "fs meta: %-16llu\n",
+ 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",
+ seq_printf(seq, "fs discard: %-16llu\n",
sbi->rw_iostat[FS_DISCARD]);
return 0;
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 72ce00ebcede..07cd162d268d 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -3413,6 +3413,8 @@ void f2fs_outplace_write_data(struct dnode_of_data *dn,
f2fs_update_data_blkaddr(dn, fio->new_blkaddr);
f2fs_update_iostat(sbi, fio->io_type, F2FS_BLKSIZE);
+ if (f2fs_compressed_file(dn->inode) && fio->io_type == FS_DATA_IO)
+ f2fs_update_iostat(sbi, FS_CDATA_IO, F2FS_BLKSIZE);
}
int f2fs_inplace_write_data(struct f2fs_io_info *fio)
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 513e889ef8aa..e395442502e8 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -1823,7 +1823,10 @@ TRACE_EVENT(f2fs_iostat,
__field(unsigned long long, app_bio)
__field(unsigned long long, app_wio)
__field(unsigned long long, app_mio)
+ __field(unsigned long long, app_bcdio)
+ __field(unsigned long long, app_mcdio)
__field(unsigned long long, fs_dio)
+ __field(unsigned long long, fs_cdio)
__field(unsigned long long, fs_nio)
__field(unsigned long long, fs_mio)
__field(unsigned long long, fs_gc_dio)
@@ -1835,6 +1838,8 @@ TRACE_EVENT(f2fs_iostat,
__field(unsigned long long, app_brio)
__field(unsigned long long, app_rio)
__field(unsigned long long, app_mrio)
+ __field(unsigned long long, app_bcrio)
+ __field(unsigned long long, app_mcrio)
__field(unsigned long long, fs_drio)
__field(unsigned long long, fs_gdrio)
__field(unsigned long long, fs_cdrio)
@@ -1849,7 +1854,10 @@ TRACE_EVENT(f2fs_iostat,
__entry->app_bio = iostat[APP_BUFFERED_IO];
__entry->app_wio = iostat[APP_WRITE_IO];
__entry->app_mio = iostat[APP_MAPPED_IO];
+ __entry->app_bcdio = iostat[APP_BUFFERED_CDATA_IO];
+ __entry->app_mcdio = iostat[APP_MAPPED_CDATA_IO];
__entry->fs_dio = iostat[FS_DATA_IO];
+ __entry->fs_cdio = iostat[FS_CDATA_IO];
__entry->fs_nio = iostat[FS_NODE_IO];
__entry->fs_mio = iostat[FS_META_IO];
__entry->fs_gc_dio = iostat[FS_GC_DATA_IO];
@@ -1861,6 +1869,8 @@ TRACE_EVENT(f2fs_iostat,
__entry->app_brio = iostat[APP_BUFFERED_READ_IO];
__entry->app_rio = iostat[APP_READ_IO];
__entry->app_mrio = iostat[APP_MAPPED_READ_IO];
+ __entry->app_bcrio = iostat[APP_BUFFERED_CDATA_READ_IO];
+ __entry->app_mcrio = iostat[APP_MAPPED_CDATA_READ_IO];
__entry->fs_drio = iostat[FS_DATA_READ_IO];
__entry->fs_gdrio = iostat[FS_GDATA_READ_IO];
__entry->fs_cdrio = iostat[FS_CDATA_READ_IO];
@@ -1870,20 +1880,24 @@ TRACE_EVENT(f2fs_iostat,
),
TP_printk("dev = (%d,%d), "
- "app [write=%llu (direct=%llu, buffered=%llu), mapped=%llu], "
- "fs [data=%llu, node=%llu, meta=%llu, discard=%llu], "
+ "app [write=%llu (direct=%llu, buffered=%llu), mapped=%llu, "
+ "compr(buffered=%llu, mapped=%llu)], "
+ "fs [data=%llu, cdata=%llu, node=%llu, meta=%llu, discard=%llu], "
"gc [data=%llu, node=%llu], "
"cp [data=%llu, node=%llu, meta=%llu], "
"app [read=%llu (direct=%llu, buffered=%llu), mapped=%llu], "
- "fs [data=%llu, (gc_data=%llu, compr_data=%llu), "
+ "compr(buffered=%llu, mapped=%llu)], "
+ "fs [data=%llu, (gc_data=%llu, cdata=%llu), "
"node=%llu, meta=%llu]",
show_dev(__entry->dev), __entry->app_wio, __entry->app_dio,
- __entry->app_bio, __entry->app_mio, __entry->fs_dio,
+ __entry->app_bio, __entry->app_mio, __entry->app_bcdio,
+ __entry->app_mcdio, __entry->fs_dio, __entry->fs_cdio,
__entry->fs_nio, __entry->fs_mio, __entry->fs_discard,
__entry->fs_gc_dio, __entry->fs_gc_nio, __entry->fs_cp_dio,
__entry->fs_cp_nio, __entry->fs_cp_mio,
__entry->app_rio, __entry->app_drio, __entry->app_brio,
- __entry->app_mrio, __entry->fs_drio, __entry->fs_gdrio,
+ __entry->app_mrio, __entry->app_bcrio, __entry->app_mcrio,
+ __entry->fs_drio, __entry->fs_gdrio,
__entry->fs_cdrio, __entry->fs_nrio, __entry->fs_mrio)
);

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