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samples/bpf: Use getppid instead of getpgrp for array map stress

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When cross-compiling the bpf sample map_perf_test for aarch64, I find that
__NR_getpgrp is undefined. This causes build errors. This syscall is deprecated
and requires defining __ARCH_WANT_SYSCALL_DEPRECATED. To avoid having to define
that, just use a different syscall (getppid) for the array map stress test.

Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Joel Fernandes <joelaf@google.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Joel Fernandes 2017-09-20 09:11:56 -07:00 • committed by David S. Miller
parent ae3e24fd54
commit 95ec669685
2 changed files with 2 additions and 2 deletions
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2
samples/bpf/map_perf_test_kern.c
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@ -266,7 +266,7 @@ int stress_hash_map_lookup(struct pt_regs *ctx)
return 0; return 0;
} }
SEC("kprobe/sys_getpgrp") SEC("kprobe/sys_getppid")
int stress_array_map_lookup(struct pt_regs *ctx) int stress_array_map_lookup(struct pt_regs *ctx)
{ {
u32 key = 1, i; u32 key = 1, i;

2
samples/bpf/map_perf_test_user.c
View file

@ -282,7 +282,7 @@ static void test_array_lookup(int cpu)
start_time = time_get_ns(); start_time = time_get_ns();
for (i = 0; i < max_cnt; i++) for (i = 0; i < max_cnt; i++)
syscall(__NR_getpgrp, 0); syscall(__NR_getppid, 0);
printf("%d:array_lookup %lld lookups per sec\n", printf("%d:array_lookup %lld lookups per sec\n",
cpu, max_cnt * 1000000000ll * 64 / (time_get_ns() - start_time)); cpu, max_cnt * 1000000000ll * 64 / (time_get_ns() - start_time));
} }