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| author | Jesper Dangaard Brouer <brouer@redhat.com> | 2018-08-08 23:00:39 +0200 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-08-09 21:50:44 +0200 |
| commit | 37d7ff25957e05860e068a986209fee128db574a (patch) | |
| tree | 33c5db1b89a72b50902792c02810278c32393744 /samples/bpf | |
| parent | ad0ab027fc6da08cbd34070d816ff3b7986c64ae (diff) | |
| download | linux-37d7ff25957e05860e068a986209fee128db574a.tar.gz linux-37d7ff25957e05860e068a986209fee128db574a.tar.bz2 linux-37d7ff25957e05860e068a986209fee128db574a.zip | |
samples/bpf: xdp_redirect_cpu adjustment to reproduce teardown race easier
The teardown race in cpumap is really hard to reproduce. These changes
makes it easier to reproduce, for QA.
The --stress-mode now have a case of a very small queue size of 8, that helps
to trigger teardown flush to encounter a full queue, which results in calling
xdp_return_frame API, in a non-NAPI protect context.
Also increase MAX_CPUS, as my QA department have larger machines than me.
Tested-by: Jean-Tsung Hsiao <jhsiao@redhat.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'samples/bpf')
| -rw-r--r-- | samples/bpf/xdp_redirect_cpu_kern.c | 2 | ||||
| -rw-r--r-- | samples/bpf/xdp_redirect_cpu_user.c | 4 |
2 files changed, 3 insertions, 3 deletions
diff --git a/samples/bpf/xdp_redirect_cpu_kern.c b/samples/bpf/xdp_redirect_cpu_kern.c index 303e9e7161f3..4938dcbaecbf 100644 --- a/samples/bpf/xdp_redirect_cpu_kern.c +++ b/samples/bpf/xdp_redirect_cpu_kern.c @@ -14,7 +14,7 @@ #include <uapi/linux/bpf.h> #include "bpf_helpers.h" -#define MAX_CPUS 12 /* WARNING - sync with _user.c */ +#define MAX_CPUS 64 /* WARNING - sync with _user.c */ /* Special map type that can XDP_REDIRECT frames to another CPU */ struct bpf_map_def SEC("maps") cpu_map = { diff --git a/samples/bpf/xdp_redirect_cpu_user.c b/samples/bpf/xdp_redirect_cpu_user.c index f6efaefd485b..4b4d78fffe30 100644 --- a/samples/bpf/xdp_redirect_cpu_user.c +++ b/samples/bpf/xdp_redirect_cpu_user.c @@ -19,7 +19,7 @@ static const char *__doc__ = #include <arpa/inet.h> #include <linux/if_link.h> -#define MAX_CPUS 12 /* WARNING - sync with _kern.c */ +#define MAX_CPUS 64 /* WARNING - sync with _kern.c */ /* How many xdp_progs are defined in _kern.c */ #define MAX_PROG 5 @@ -527,7 +527,7 @@ static void stress_cpumap(void) * procedure. */ create_cpu_entry(1, 1024, 0, false); - create_cpu_entry(1, 128, 0, false); + create_cpu_entry(1, 8, 0, false); create_cpu_entry(1, 16000, 0, false); } |