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Date: Fri, 12 Aug 2022 10:29:30 -0700
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: Chao Yu <chao@...nel.org>
Cc: linux-f2fs-devel@...ts.sourceforge.net,
linux-kernel@...r.kernel.org, Chao Yu <chao.yu@...o.com>
Subject: Re: [PATCH v2] f2fs: iostat: support accounting compressed IO
At a glance, it'd be better to have a parameter in f2fs_update_iostat()
to split compressed vs. non-compressed IO accounts.
On 08/07, Chao Yu wrote:
> From: Chao Yu <chao.yu@...o.com>
>
> 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@...o.com>
> ---
> 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)
> );
>
> --
> 2.36.1
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