From: Joel Fernandes <joelaf@google.com>
To: linux-kernel@vger.kernel.org
Cc: Chenbo Feng <fengc@google.com>,
Alison Chaiken <alison@she-devel.com>,
Juri.Lelli@arm.com, Joel Fernandes <joelaf@google.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
netdev@vger.kernel.org (open list:BPF (Safe dynamic programs and
tools))
Subject: [PATCH RFC v2 1/5] samples/bpf: Use getppid instead of getpgrp for array map stress
Date: Mon, 7 Aug 2017 06:05:58 -0700 [thread overview]
Message-ID: <20170807130602.31785-2-joelaf@google.com> (raw)
In-Reply-To: <20170807130602.31785-1-joelaf@google.com>
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.
Signed-off-by: Joel Fernandes <joelaf@google.com>
---
samples/bpf/map_perf_test_kern.c | 2 +-
samples/bpf/map_perf_test_user.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/samples/bpf/map_perf_test_kern.c b/samples/bpf/map_perf_test_kern.c
index 245165817fbe..038ffec295cf 100644
--- a/samples/bpf/map_perf_test_kern.c
+++ b/samples/bpf/map_perf_test_kern.c
@@ -232,7 +232,7 @@ int stress_hash_map_lookup(struct pt_regs *ctx)
return 0;
}
-SEC("kprobe/sys_getpgrp")
+SEC("kprobe/sys_getppid")
int stress_array_map_lookup(struct pt_regs *ctx)
{
u32 key = 1, i;
diff --git a/samples/bpf/map_perf_test_user.c b/samples/bpf/map_perf_test_user.c
index 1a8894b5ac51..1e9e68942197 100644
--- a/samples/bpf/map_perf_test_user.c
+++ b/samples/bpf/map_perf_test_user.c
@@ -232,7 +232,7 @@ static void test_array_lookup(int cpu)
start_time = time_get_ns();
for (i = 0; i < max_cnt; i++)
- syscall(__NR_getpgrp, 0);
+ syscall(__NR_getppid, 0);
printf("%d:array_lookup %lld lookups per sec\n",
cpu, max_cnt * 1000000000ll * 64 / (time_get_ns() - start_time));
}
--
2.14.0.rc1.383.gd1ce394fe2-goog
next prev parent reply other threads:[~2017-08-07 13:08 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-07 13:05 [PATCH RFC v2 0/5] add arm64 cross compilation support to BPF samples Joel Fernandes
2017-08-07 13:05 ` Joel Fernandes [this message]
2017-08-07 13:05 ` [PATCH RFC v2 2/5] samples/bpf: Enable cross compiler support Joel Fernandes
2017-08-07 13:06 ` [PATCH RFC v2 3/5] samples/bpf: Fix inline asm issues building samples on arm64 Joel Fernandes
2017-08-07 13:15 ` Joel Fernandes
2017-08-07 18:28 ` David Miller
2017-08-08 1:20 ` Joel Fernandes
2017-08-09 3:35 ` David Miller
2017-08-18 6:55 ` Joel Fernandes
2017-08-07 13:06 ` [PATCH RFC v2 4/5] samples/bpf: Fix pt_regs issues when cross-compiling Joel Fernandes
2017-08-07 13:06 ` [PATCH RFC v2 5/5] samples/bpf: Add documentation on cross compilation Joel Fernandes
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