Disk Writeback and Sync Monitor is a desktop page-cache telemetry viewer and kernel filesystem buffer sync utility for Linux workstations and removable storage workflows. An independent Linux alternative to command-line disk flush tools such as Sync, sync(1), and vmstat, it monitors live kernel dirty buffers and executes measured os.sync() and targeted os.fsync() flushes.

Key Features:

• Live Page Cache & Writeback Telemetry: Reads /proc/meminfo (Dirty, Writeback, WritebackTmp, Cached, Buffers, Active(file), Inactive(file), SReclaimable) and /proc/vmstat (nr_dirty, nr_writeback, nr_written, pgpgin, pgpgout) in real time.
• Measured Kernel Sync & Targeted fsync: Triggers system-wide os.sync() or directory/file os.fsync() operations while recording exact flush latency (ms) and pre/post Dirty KB deltas in an execution log.
• Kernel VM Writeback Policy Inspector: Displays live /proc/sys/vm thresholds including dirty_ratio, dirty_background_ratio, dirty_expire_centisecs, and dirty_writeback_centisecs alongside mounted filesystem capacity stats.
• Time-Series Charts & Reports: Plots live Dirty/Writeback KB history and page cache composition charts and exports telemetry and sync logs to CSV and JSON.

Disclaimer: This project is an independent open-source tool and is not affiliated with, sponsored by, or endorsed by Microsoft Corporation.