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Thu, 16 Apr 2020 03:42:31 +0000 Received: from localhost (unknown [104.132.1.66]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7724420737; Thu, 16 Apr 2020 03:42:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587008537; bh=3bdCitI6DbtfpJ8kO1TDqDqoKTqTZP8xYsOYGObs8do=; h=Date:From:To:Subject:References:In-Reply-To:From; b=s9vZ1bN22hDMSwhRJNr7GEGww4DRupw6O6A1EJ+JEk2S2hei94WewGsC3RW/fQZL9 gkoNv6u0FGNAs86g5A+hWgkRlMaTkt44gZTjY38tebmcO/loIEOVxJ9U+FGASJKRkQ zIExw821mKKrsnz4Fx02WRWLliw+2d1iqZA+ss78= Date: Wed, 15 Apr 2020 20:42:17 -0700 From: Jaegeuk Kim To: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, kernel-team@android.com Message-ID: <20200416034217.GA254838@google.com> References: <20200413161649.38177-1-jaegeuk@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200413161649.38177-1-jaegeuk@kernel.org> X-Headers-End: 1jOvQ4-001MzK-Ok Subject: Re: [f2fs-dev] [PATCH v2] f2fs: add tracepoint for f2fs iostat X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net v2: - add sysfs entry to give the time period - keep stat records in sbi >From 805015f3f2cec3acf43321359129c5382a1d5db4 Mon Sep 17 00:00:00 2001 From: Daeho Jeong Date: Mon, 30 Mar 2020 03:30:59 +0000 Subject: [PATCH] f2fs: add tracepoint for f2fs iostat Added a tracepoint to see iostat of f2fs. Default period of that is 3 second. This tracepoint can be used to be monitoring I/O statistics periodically. Bug: 152162885 Change-Id: I6fbe010b9cf1a90caa0f4793a6dab77c4cba7da6 Signed-off-by: Daeho Jeong --- Documentation/ABI/testing/sysfs-fs-f2fs | 6 +++ fs/f2fs/f2fs.h | 16 +++++++- fs/f2fs/super.c | 1 + fs/f2fs/sysfs.c | 39 +++++++++++++++++++ include/trace/events/f2fs.h | 52 +++++++++++++++++++++++++ 5 files changed, 113 insertions(+), 1 deletion(-) diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index c8620ea7022a7..427f5b45c67f1 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -332,3 +332,9 @@ Description: Give a way to attach REQ_META|FUA to data writes * REQ_META | REQ_FUA | * 5 | 4 | 3 | 2 | 1 | 0 | * Cold | Warm | Hot | Cold | Warm | Hot | + +What: /sys/fs/f2fs//iostat_period_ms +Date: April 2020 +Contact: "Daeho Jeong" +Description: Give a way to change iostat_period time. 3secs by default. + The new iostat trace gives stats gap given the period. diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index c2788738aa0d4..6cedbfb2067c5 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1505,7 +1505,10 @@ struct f2fs_sb_info { /* For app/fs IO statistics */ spinlock_t iostat_lock; unsigned long long write_iostat[NR_IO_TYPE]; + unsigned long long prev_write_iostat[NR_IO_TYPE]; bool iostat_enable; + unsigned long iostat_next_period; + unsigned int iostat_period_ms; /* to attach REQ_META|REQ_FUA flags */ unsigned int data_io_flag; @@ -2999,16 +3002,25 @@ static inline int get_inline_xattr_addrs(struct inode *inode) sizeof((f2fs_inode)->field)) \ <= (F2FS_OLD_ATTRIBUTE_SIZE + (extra_isize))) \ +#define DEFAULT_IOSTAT_PERIOD_MS 3000 +#define MIN_IOSTAT_PERIOD_MS 100 +/* maximum period of iostat tracing is 1 day */ +#define MAX_IOSTAT_PERIOD_MS 8640000 + static inline void f2fs_reset_iostat(struct f2fs_sb_info *sbi) { int i; spin_lock(&sbi->iostat_lock); - for (i = 0; i < NR_IO_TYPE; i++) + for (i = 0; i < NR_IO_TYPE; i++) { sbi->write_iostat[i] = 0; + sbi->prev_write_iostat[i] = 0; + } spin_unlock(&sbi->iostat_lock); } +extern void f2fs_record_iostat(struct f2fs_sb_info *sbi); + static inline void f2fs_update_iostat(struct f2fs_sb_info *sbi, enum iostat_type type, unsigned long long io_bytes) { @@ -3022,6 +3034,8 @@ static inline void f2fs_update_iostat(struct f2fs_sb_info *sbi, sbi->write_iostat[APP_WRITE_IO] - sbi->write_iostat[APP_DIRECT_IO]; spin_unlock(&sbi->iostat_lock); + + f2fs_record_iostat(sbi); } #define __is_large_section(sbi) ((sbi)->segs_per_sec > 1) diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index f2dfc21c6abb0..438296e17183d 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -3424,6 +3424,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent) /* init iostat info */ spin_lock_init(&sbi->iostat_lock); sbi->iostat_enable = false; + sbi->iostat_period_ms = DEFAULT_IOSTAT_PERIOD_MS; for (i = 0; i < NR_PAGE_TYPE; i++) { int n = (i == META) ? 1: NR_TEMP_TYPE; diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index aeebfb5024a22..d05cb68c26374 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -15,6 +15,7 @@ #include "f2fs.h" #include "segment.h" #include "gc.h" +#include static struct proc_dir_entry *f2fs_proc_root; @@ -379,6 +380,15 @@ static ssize_t __sbi_store(struct f2fs_attr *a, return count; } + if (!strcmp(a->attr.name, "iostat_period_ms")) { + if (t < MIN_IOSTAT_PERIOD_MS || t > MAX_IOSTAT_PERIOD_MS) + return -EINVAL; + spin_lock(&sbi->iostat_lock); + sbi->iostat_period_ms = (unsigned int)t; + spin_unlock(&sbi->iostat_lock); + return count; + } + *ui = (unsigned int)t; return count; @@ -535,6 +545,7 @@ F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable); +F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_period_ms, iostat_period_ms); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold); F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list); @@ -615,6 +626,7 @@ static struct attribute *f2fs_attrs[] = { ATTR_LIST(gc_idle_interval), ATTR_LIST(umount_discard_timeout), ATTR_LIST(iostat_enable), + ATTR_LIST(iostat_period_ms), ATTR_LIST(readdir_ra), ATTR_LIST(gc_pin_file_thresh), ATTR_LIST(extension_list), @@ -751,6 +763,33 @@ static int __maybe_unused segment_bits_seq_show(struct seq_file *seq, return 0; } +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->write_iostat[i] - + sbi->prev_write_iostat[i]; + sbi->prev_write_iostat[i] = sbi->write_iostat[i]; + } + spin_unlock(&sbi->iostat_lock); + + trace_f2fs_iostat(sbi, iostat_diff); +} + static int __maybe_unused iostat_info_seq_show(struct seq_file *seq, void *offset) { diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h index d97adfc327f03..e78c8696e2adc 100644 --- a/include/trace/events/f2fs.h +++ b/include/trace/events/f2fs.h @@ -1812,6 +1812,58 @@ DEFINE_EVENT(f2fs_zip_end, f2fs_decompress_pages_end, TP_ARGS(inode, cluster_idx, compressed_size, ret) ); +TRACE_EVENT(f2fs_iostat, + + TP_PROTO(struct f2fs_sb_info *sbi, unsigned long long *iostat), + + TP_ARGS(sbi, iostat), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(unsigned long long, app_dio) + __field(unsigned long long, app_bio) + __field(unsigned long long, app_wio) + __field(unsigned long long, app_mio) + __field(unsigned long long, fs_dio) + __field(unsigned long long, fs_nio) + __field(unsigned long long, fs_mio) + __field(unsigned long long, fs_gc_dio) + __field(unsigned long long, fs_gc_nio) + __field(unsigned long long, fs_cp_dio) + __field(unsigned long long, fs_cp_nio) + __field(unsigned long long, fs_cp_mio) + __field(unsigned long long, fs_discard) + ), + + TP_fast_assign( + __entry->dev = sbi->sb->s_dev; + __entry->app_dio = iostat[APP_DIRECT_IO]; + __entry->app_bio = iostat[APP_BUFFERED_IO]; + __entry->app_wio = iostat[APP_WRITE_IO]; + __entry->app_mio = iostat[APP_MAPPED_IO]; + __entry->fs_dio = iostat[FS_DATA_IO]; + __entry->fs_nio = iostat[FS_NODE_IO]; + __entry->fs_mio = iostat[FS_META_IO]; + __entry->fs_gc_dio = iostat[FS_GC_DATA_IO]; + __entry->fs_gc_nio = iostat[FS_GC_NODE_IO]; + __entry->fs_cp_dio = iostat[FS_CP_DATA_IO]; + __entry->fs_cp_nio = iostat[FS_CP_NODE_IO]; + __entry->fs_cp_mio = iostat[FS_CP_META_IO]; + __entry->fs_discard = iostat[FS_DISCARD]; + ), + + TP_printk("dev = (%d,%d), " + "app [write=%llu (direct=%llu, buffered=%llu), mapped=%llu], " + "fs [data=%llu, node=%llu, meta=%llu, discard=%llu], " + "gc [data=%llu, node=%llu], " + "cp [data=%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->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) +); + #endif /* _TRACE_F2FS_H */ /* This part must be outside protection */ -- 2.26.0.110.g2183baf09c-goog _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel