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| author | Alexei Starovoitov <ast@fb.com> | 2016-02-01 22:39:58 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-02-06 03:34:36 -0500 |
| commit | 3059303f59cf90a84e7fdef154ff0b215bcfaa97 (patch) | |
| tree | bacdf1b8025256fc591b1fd935a99f0b6af7466f /samples/bpf/tracex2_user.c | |
| parent | df570f577231407d929bdc6f59ae2f53e0028e8a (diff) | |
| download | linux-3059303f59cf90a84e7fdef154ff0b215bcfaa97.tar.gz linux-3059303f59cf90a84e7fdef154ff0b215bcfaa97.tar.bz2 linux-3059303f59cf90a84e7fdef154ff0b215bcfaa97.zip | |
samples/bpf: update tracex[23] examples to use per-cpu maps
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples/bpf/tracex2_user.c')
| -rw-r--r-- | samples/bpf/tracex2_user.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/samples/bpf/tracex2_user.c b/samples/bpf/tracex2_user.c index cd0241c1447a..ab5b19e68acf 100644 --- a/samples/bpf/tracex2_user.c +++ b/samples/bpf/tracex2_user.c @@ -37,6 +37,8 @@ struct hist_key { static void print_hist_for_pid(int fd, void *task) { struct hist_key key = {}, next_key; + unsigned int nr_cpus = sysconf(_SC_NPROCESSORS_CONF); + long values[nr_cpus]; char starstr[MAX_STARS]; long value; long data[MAX_INDEX] = {}; @@ -49,7 +51,10 @@ static void print_hist_for_pid(int fd, void *task) key = next_key; continue; } - bpf_lookup_elem(fd, &next_key, &value); + bpf_lookup_elem(fd, &next_key, values); + value = 0; + for (i = 0; i < nr_cpus; i++) + value += values[i]; ind = next_key.index; data[ind] = value; if (value && ind > max_ind) |