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strace -o output.txt -T -tt -e trace=all -p 28979 上面的含义是 跟踪28979进程的所有系统调用(-e trace=all),并统计系统调用的花费时间,以及开始时间(并以可视化的时分秒格式显示),最后将记录结果存在output.txt文件里面。 语法 strace [ -dffhiqrtttTvxx ] [ -acolumn ] [ -eexpr ] ... [ -o...
support -- Support facilities tracepoints -- Tracing of program execution without stopping the program user-defined -- User-defined commands Type"help"followed by aclassnamefora list of commands in thatclass. Type"help all"forthe list of all commands. Type"help"followed by command nameforfull ...
如果是在x86的機器上,要Enable “Kernel Function Graph Trace”的功能,就要透過General setup --->Optimize for size ,選擇關閉 “Optimize for size “. 而在ARM平台上,目前沒有“Kernel Function Graph Trace”的選項,所以就不受此限制. 此外,在Linux Kernel 2.6.31 給ARM環境的組態中,目前並不支援Dynamic F...
51. mtr - is a network diagnostic tool, a combination of ping and traceroute commands. 52. nslookup - interactively query Internet name servers (NS). 53. host –used for DNS (Domain Name System) lookup operations. 54. dig – DNS lookup tool. ...
工欲善其事必先利其器,要想分析清楚linux服务器中的各类问题,比如性能问题,服务程序的bug,那么必须对该系统下的分析工具有一定的了解,本文对当前的主流cpu,内存,网络,io以及各种debug分析工具(blktrace,perf,systemtap)做了个简单总结。 注:学无止境,故需持续更新 性能分析工具 linux性能分析工具www.brendangreg...
SYM_CODE_START_LOCAL(ret_to_user) disable_daif //D A I F 分别为PSTAT中的四个异常屏蔽标志位,此处屏蔽这4中异常 gic_prio_kentry_setup tmp=x3 #ifdef CONFIG_TRACE_IRQFLAGS bl trace_hardirqs_off #endif ldr x19, [tsk, #TSK_TI_FLAGS] //获取 thread_info 中的flags变量的值 and x2, x19...
trace_init();/* 跟踪调试相关初始化 */ if (initcall_debug) initcall_debug_enable(); context_tracking_init(); /* init some links before init_ISA_irqs() */ early_irq_init();//初始中断相关初始化,主要是注册 irq_desc 结构体变量,因为 Linux 内核使用 irq_desc 来描述一个中断。
tracepoints -- Tracing of program execution without stopping the program user-defined -- User-defined commands Type "help" followed by a class name for a list of commands in that class. Type "help" followed by command name for full documentation. ...
provide a stack trace. The value of EXPR indicates how many call frames to go back before the current one; the top frame is frame 0. Exit Status: Returns 0 unless the shell is not executing a shell function or EXPR is invalid.