[英]how to save ouput of perf (Linux tool) to a file?
I want to save results after running perf command, eg.我想在运行 perf 命令后保存结果,例如。
perf stat -B dd if=/dev/zero of=/dev/null count=1000000 &> result1 perf stat -B dd if=/dev/zero of=/dev/null count=1000000 &> result1
I tried a couple of ways, like我尝试了几种方法,例如
(perf stat -B dd if=/dev/zero of=/dev/null count=1000000 &>result1) > result2
(perf stat -B dd if=/dev/zero of=/dev/null count=1000000 &>result1) 2> result2
(perf stat -B dd if=/dev/zero of=/dev/null count=1000000 &>result1) &> result2
((perf stat -B dd if=/dev/zero of=/dev/null count=1000000 &>result1) &> result2) > result3
well, none of these actually gave me what I want.好吧,这些实际上都没有给我我想要的。
The result is结果是
Performance counter stats for 'dd if= enter code here
/dev/zero of=/dev/null count=1000000': 'dd if= enter code here
/dev/zero of=/dev/null count=1000000' 的性能计数器统计信息:
235.959041 task-clock # 0.998 CPUs utilized
20 context-switches # 0.000 M/sec
.........(too long, dont want to have all of them here)
0.236448007 seconds time elapsed"
I just want to save these to the file.我只想将这些保存到文件中。
Thanks a lot!!!非常感谢!!!
strace
显示perf
写入文件描述符 0,所以这应该可以工作:
perf stat -B dd if=/dev/zero of=/dev/null count=1000000 0> result1
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