========== pgmeter ========== pgmeter is a filesystem I/O benchmark. It is configured to run on any of the ext2, ext3, reiserfs, JFS, or XFS filesystems in OSDL STP. pgmeter is designed to measure the rate at which data can be transferred to or from a file. pgmeter is actually a complete system benchmark (file system, disk drivers, disk subsystem, RAID, memory bus, memory subsystem, OS system calls). However, for comparing file systems, it is best used in its "buffer cache performance comparison" mode [opinion]. This mode uses file sizes that are smaller than the buffer cache so that actual disk I/O is limited and the filesystem code becomes more critical.