[linux 各种trace工具]

linux 各种trace工具

1、bpf

2、bpftrace

3、strace

可以查看进程程序的IO调用情况 ，比如进程有哪些IO调用，花费了多长时间等等。可以定位进程慢、驱动慢等问题

Output format:
-a column alignment COLUMN for printing syscall results (default 40)
-i print instruction pointer at time of syscall
-k obtain stack trace between each syscall (experimental)
-o file send trace output to FILE instead of stderr
-q suppress messages about attaching, detaching, etc.
-r print relative timestamp
-s strsize limit length of print strings to STRSIZE chars (default 32)
-t print absolute timestamp
-tt print absolute timestamp with usecs
-T print time spent in each syscall
-x print non-ascii strings in hex
-xx print all strings in hex
-y print paths associated with file descriptor arguments
-yy print protocol specific information associated with socket file descriptors

Statistics:
-c count time, calls, and errors for each syscall and report summary
-C like -c but also print regular output
-O overhead set overhead for tracing syscalls to OVERHEAD usecs
-S sortby sort syscall counts by: time, calls, name, nothing (default time)
-w summarise syscall latency (default is system time)

Filtering:
-e expr a qualifying expression: option=[!]all or option=[!]val1[,val2]...
options: trace, abbrev, verbose, raw, signal, read, write, fault
-P path trace accesses to path

Tracing:
-b execve detach on execve syscall
-D run tracer process as a detached grandchild, not as parent
-f follow forks
-ff follow forks with output into separate files
-I interruptible
1: no signals are blocked
2: fatal signals are blocked while decoding syscall (default)
3: fatal signals are always blocked (default if '-o FILE PROG')
4: fatal signals and SIGTSTP (^Z) are always blocked
(useful to make 'strace -o FILE PROG' not stop on ^Z)

5、mtrace

interpret the malloc trace log

6、ltrace

​ A library call tracer

7、fbtracemgr

Firebird operation traces

8、tracepath

traces path to a network host discovering MTU along this path

9、strace-log-merge

merge strace -ff -tt output