Perf-Tools Linux 下性能调优工具集 项目简介
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
[...]
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
[...]