Perf-Tools 介绍
Perf-Tools 是基于 perf_events (perf) 和 ftrace
的Linux性能分析调优工具集。Perf-Tools 依赖库少，使用简单。
支持Linux 3.2 及以上内核版本。
结构图：
使用示例：
# ./execsnoop Tracing exec()s. Ctrl-C to end. PID PPID ARGS 22898 22004 man ls 22905 22898 preconv -e UTF-8 22908 22898 pager -s 22907 22898 nroff -mandoc -rLL=164n -rLT=164n -Tutf8 22906 22898 tbl 22911 22910 locale charmap 22912 22907 groff -mtty-char -Tutf8 -mandoc -rLL=164n -rLT=164n 22913 22912 troff -mtty-char -mandoc -rLL=164n -rLT=164n -Tutf8 22914 22912 grotty # ./tpoint -s block:block_rq_insert 'rwbs ~ "*R*"' cksum-11908 [000] d... 7269839.919098: block_rq_insert: 202,1 R 0 () 736560 + 136 [cksum] cksum-11908 [000] d... 7269839.919107: => __elv_add_request => blk_flush_plug_list => blk_finish_plug => __do_page_cache_readahead => ondemand_readahead => page_cache_async_readahead => generic_file_read_iter => new_sync_read => vfs_read => SyS_read => system_call_fastpath [...]