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[root@five ~]# perf bench uprobe all
# Running uprobe/baseline benchmark...
# Executed 1,000 usleep(1000) calls
Total time: 1,053,963 usecs
1,053.963 usecs/op
# Running uprobe/empty benchmark...
# Executed 1,000 usleep(1000) calls
Total time: 1,056,293 usecs +2,330 to baseline
1,056.293 usecs/op 2.330 usecs/op to baseline
# Running uprobe/trace_printk benchmark...
# Executed 1,000 usleep(1000) calls
Total time: 1,056,977 usecs +3,014 to baseline +684 to previous
1,056.977 usecs/op 3.014 usecs/op to baseline 0.684 usecs/op to previous
[root@five ~]#
Acked-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andre Fredette <anfredet@redhat.com>
Cc: Clark Williams <williams@redhat.com>
Cc: Dave Tucker <datucker@redhat.com>
Cc: Derek Barbosa <debarbos@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/lkml/20230719204910.539044-6-acme@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
24 lines
421 B
C
24 lines
421 B
C
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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// Copyright (c) 2023 Red Hat
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#include "vmlinux.h"
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#include <bpf/bpf_tracing.h>
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unsigned int nr_uprobes;
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SEC("uprobe")
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int BPF_UPROBE(empty)
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{
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return 0;
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}
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SEC("uprobe")
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int BPF_UPROBE(trace_printk)
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{
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char fmt[] = "perf bench uprobe %u";
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bpf_trace_printk(fmt, sizeof(fmt), ++nr_uprobes);
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return 0;
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}
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char LICENSE[] SEC("license") = "Dual BSD/GPL";
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