diff options
| author |   Toke Høiland-Jørgensen <toke@toke.dk> | 2018-06-25 14:25:02 +0200 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2018-06-27 11:01:03 +0200 |
| commit | 22adedd304668f0a2001284ddf225b49e9c05c64 (patch) | |
| tree | 9b3c268ffc6eedfe91fb434c304f8b932ca46888 /tools/testing/selftests/bpf/trace_helpers.h | |
| parent | nfp: bpf: allow source ptr type be map ptr in memcpy optimization (diff) | |
| download | linux-dev-22adedd304668f0a2001284ddf225b49e9c05c64.tar.xz linux-dev-22adedd304668f0a2001284ddf225b49e9c05c64.zip | |
trace_helpers.c: Add helpers to poll multiple perf FDs for events
Add two new helper functions to trace_helpers that supports polling
multiple perf file descriptors for events. These are used to the XDP
perf_event_output example, which needs to work with one perf fd per CPU.
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/testing/selftests/bpf/trace_helpers.h')
| -rw-r--r-- | tools/testing/selftests/bpf/trace_helpers.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/trace_helpers.h b/tools/testing/selftests/bpf/trace_helpers.h index 3b4bcf7f5084..18924f23db1b 100644 --- a/tools/testing/selftests/bpf/trace_helpers.h +++ b/tools/testing/selftests/bpf/trace_helpers.h @@ -3,6 +3,7 @@ #define __TRACE_HELPER_H #include <libbpf.h> +#include <linux/perf_event.h> struct ksym { long addr; @@ -16,6 +17,9 @@ long ksym_get_addr(const char *name); typedef enum bpf_perf_event_ret (*perf_event_print_fn)(void *data, int size); int perf_event_mmap(int fd); +int perf_event_mmap_header(int fd, struct perf_event_mmap_page **header); /* return LIBBPF_PERF_EVENT_DONE or LIBBPF_PERF_EVENT_ERROR */ int perf_event_poller(int fd, perf_event_print_fn output_fn); +int perf_event_poller_multi(int *fds, struct perf_event_mmap_page **headers, + int num_fds, perf_event_print_fn output_fn); #endif |