Messages in this thread | | | Date | Fri, 4 Dec 2020 00:31:41 +0100 | From | Jiri Olsa <> | Subject | Re: [PATCH v1 2/2] perf-stat: enable counting events for BPF programs |
| |
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; | ^~~
jirka
| |