> On Dec 3, 2020, at 3:31 PM, Jiri Olsa <[email protected]> wrote: > > On Wed, Dec 02, 2020 at 01:37:09AM -0800, Song Liu wrote: >> Introduce perf-stat -b option, which counts events for BPF programs, like: >> >> [root@localhost ~]# ~/perf stat -e ref-cycles,cycles -b 254 -I 1000 >> 1.487903822 115,200 ref-cycles >> 1.487903822 86,012 cycles >> 2.489147029 80,560 ref-cycles >> 2.489147029 73,784 cycles >> 3.490341825 60,720 ref-cycles >> 3.490341825 37,797 cycles >> 4.491540887 37,120 ref-cycles >> 4.491540887 31,963 cycles > > hi, > I'm getting compile fail with gcc 10: > > builtin-stat.c: In function ‘cmd_stat’: > builtin-stat.c:2429:7: error: declaration of ‘err’ shadows a previous > local [-Werror=shadow] > 2429 | int err = perf_event__synthesize_kernel_mmap((void > *)&perf_stat, > | ^~~ > builtin-stat.c:2104:33: note: shadowed declaration is here > 2104 | int status = -EINVAL, run_idx, err; > | ^~~
gcc 9 didn't complain about it. Let me fix it in the next version. Thanks, Song
