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authorWang Nan <wangnan0@huawei.com>2016-02-22 12:10:31 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-02-22 18:20:35 +0300
commita34f3be70cdf986850552e62b9f22d659bfbcef3 (patch)
tree0bd3d7848a84524bb5c55b4eb38466bdfda36a77 /tools/perf/util/parse-events.l
parent066dacbf2a32defb4de23ea4c1af9e77578b5ac2 (diff)
downloadlinux-a34f3be70cdf986850552e62b9f22d659bfbcef3.tar.xz
perf tools: Enable BPF object configure syntax
This patch adds the final step for BPF map configuration. A new syntax is appended into parser so user can config BPF objects through '/' '/' enclosed config terms. After this patch, following syntax is available: # perf record -e ./test_bpf_map_1.c/map:channel.value=10/ ... It would takes effect after appling following commits. Test result: # cat ./test_bpf_map_1.c /************************ BEGIN **************************/ #include <uapi/linux/bpf.h> #define SEC(NAME) __attribute__((section(NAME), used)) struct bpf_map_def { unsigned int type; unsigned int key_size; unsigned int value_size; unsigned int max_entries; }; static void *(*map_lookup_elem)(struct bpf_map_def *, void *) = (void *)BPF_FUNC_map_lookup_elem; static int (*trace_printk)(const char *fmt, int fmt_size, ...) = (void *)BPF_FUNC_trace_printk; struct bpf_map_def SEC("maps") channel = { .type = BPF_MAP_TYPE_ARRAY, .key_size = sizeof(int), .value_size = sizeof(int), .max_entries = 1, }; SEC("func=sys_nanosleep") int func(void *ctx) { int key = 0; char fmt[] = "%d\n"; int *pval = map_lookup_elem(&channel, &key); if (!pval) return 0; trace_printk(fmt, sizeof(fmt), *pval); return 0; } char _license[] SEC("license") = "GPL"; int _version SEC("version") = LINUX_VERSION_CODE; /************************* END ***************************/ - Normal case: # ./perf record -e './test_bpf_map_1.c/map:channel.value=10/' usleep 10 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.012 MB perf.data ] - Error case: # ./perf record -e './test_bpf_map_1.c/map:channel.value/' usleep 10 event syntax error: '..ps:channel:value/' \___ Config value not set (missing '=') Hint: Valid config term: map:[<arraymap>]:value=[value] (add -v to see detail) Run 'perf list' for a list of valid events Usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>] -e, --event <event> event selector. use 'perf list' to list available events # ./perf record -e './test_bpf_map_1.c/xmap:channel.value=10/' usleep 10 event syntax error: '..pf_map_1.c/xmap:channel.value=10/' \___ Invalid object config option [SNIP] # ./perf record -e './test_bpf_map_1.c/map:xchannel.value=10/' usleep 10 event syntax error: '..p_1.c/map:xchannel.value=10/' \___ Target map not exist [SNIP] # ./perf record -e './test_bpf_map_1.c/map:channel.xvalue=10/' usleep 10 event syntax error: '..ps:channel.xvalue=10/' \___ Invalid object map config option [SNIP] # ./perf record -e './test_bpf_map_1.c/map:channel.value=x10/' usleep 10 event syntax error: '..nnel.value=x10/' \___ Incorrect value type for map [SNIP] Change BPF_MAP_TYPE_ARRAY to '1' in test_bpf_map_1.c: # ./perf record -e './test_bpf_map_1.c/map:channel.value=10/' usleep 10 event syntax error: '..ps:channel.value=10/' \___ Can't use this config term to this type of map Hint: Valid config term: map:[<arraymap>].value=[value] (add -v to see detail) Signed-off-by: Wang Nan <wangnan0@huawei.com> [for parser part] Acked-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Cody P Schafer <dev@codyps.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jeremie Galarneau <jeremie.galarneau@efficios.com> Cc: Kirill Smelkov <kirr@nexedi.com> Cc: Li Zefan <lizefan@huawei.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1456132275-98875-5-git-send-email-wangnan0@huawei.com Signed-off-by: He Kuang <hekuang@huawei.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/parse-events.l')
-rw-r--r--tools/perf/util/parse-events.l2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index 99486e6a8b97..0cc6b84a740a 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -122,7 +122,7 @@ num_dec [0-9]+
num_hex 0x[a-fA-F0-9]+
num_raw_hex [a-fA-F0-9]+
name [a-zA-Z_*?][a-zA-Z0-9_*?.]*
-name_minus [a-zA-Z_*?][a-zA-Z0-9\-_*?.]*
+name_minus [a-zA-Z_*?][a-zA-Z0-9\-_*?.:]*
/* If you add a modifier you need to update check_modifier() */
modifier_event [ukhpPGHSDI]+
modifier_bp [rwx]{1,3}