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Message-Id: <20150623.061031.2284937918219178217.davem@davemloft.net> Date: Tue, 23 Jun 2015 06:10:31 -0700 (PDT) From: David Miller <davem@...emloft.net> To: ast@...mgrid.com Cc: daniel.wagner@...-carit.de, daniel@...earbox.net, mingo@...nel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org Subject: Re: [PATCH v2] bpf: BPF based latency tracing From: Alexei Starovoitov <ast@...mgrid.com> Date: Fri, 19 Jun 2015 17:53:57 -0700 > On 6/19/15 7:00 AM, Daniel Wagner wrote: >> BPF offers another way to generate latency histograms. We attach >> kprobes at trace_preempt_off and trace_preempt_on and calculate the >> time it takes to from seeing the off/on transition. > ... >> Signed-off-by: Daniel Wagner <daniel.wagner@...-carit.de> > ... >> With the rebase on net-next no additinal patches are needed and this >> thing here runs fine. > ... >> samples/bpf/Makefile | 4 ++ >> samples/bpf/lathist_kern.c | 99 >> +++++++++++++++++++++++++++++++++++++++++++ >> samples/bpf/lathist_user.c | 103 >> +++++++++++++++++++++++++++++++++++++++++++++ >> 3 files changed, 206 insertions(+) >> create mode 100644 samples/bpf/lathist_kern.c >> create mode 100644 samples/bpf/lathist_user.c > > Thanks. That's a useful example. > Acked-by: Alexei Starovoitov <ast@...mgrid.com> Applied, thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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