I am using perf stat to log some hardware counters, it has a batch mode in which it prints the counter values every 1s (or whatever the interval). I want the output of one interval in one single line instead of multiple lines as shown below:
# time counts events
1.000650887 4015.442880 task-clock (msec) [100.00%]
1.000650887 214 context-switches [100.00%]
1.000650887 2 cpu-migrations [100.00%]
1.000650887 14 page-faults
1.000650887 58,447,833 cycles [83.19%]
1.000650887 50,476,562 stalled-cycles-frontend [83.26%]
1.000650887 18,469,093 stalled-cycles-backend [66.85%]
1.000650887 13,861,731 instructions [83.56%]
1.000650887 3,963,967 branches [83.60%]
1.000650887 180,104 branch-misses [83.21%]
2.004854486 4003.706096 task-clock (msec)
2.004854486 245 context-switches
2.004854486 0 cpu-migrations
2.004854486 30 page-faults
2.004854486 60,750,234 cycles [83.27%]
2.004854486 38,491,129 stalled-cycles-frontend [83.26%]
2.004854486 20,561,260 stalled-cycles-backend [66.95%]
2.004854486 15,651,369 instructions [83.36%]
2.004854486 3,826,936 branches [83.25%]
2.004854486 183,319 branch-misses [83.27%]
So that it can be saved as a csv file with each counter value for one interval as a single row. Is there a simple way to do this?
something like:
task-clock, context-switches, page-faults, cycles, instructions, branches
4105, 214, 14, 58447833, 13861, 3963967
4003, 245, 30, 60750234, 15651369, 3826936
my perf version is: 3.13.11.10
I would pass the output of perf stat through something like
awk '/task-clock/{printf("%d ", $2);} /page-faults/{printf("%d ", $2);} /branch-misses/{printf("%d\n", $2);} '
I did not add here all the fields and the header. The additions are pretty obvious