All of lore.kernel.org
 help / color / mirror / Atom feed
From: Alexei Starovoitov <ast@plumgrid.com>
To: Daniel Wagner <daniel.wagner@bmw-carit.de>
Cc: "David S. Miller" <davem@davemloft.net>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Ingo Molnar <mingo@kernel.org>,
	linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH v2] bpf: BPF based latency tracing
Date: Fri, 19 Jun 2015 17:53:57 -0700	[thread overview]
Message-ID: <5584B9A5.9030602@plumgrid.com> (raw)
In-Reply-To: <1434722444-10200-1-git-send-email-daniel.wagner@bmw-carit.de>

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@bmw-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@plumgrid.com>

Dave,
this patch is for net-next and I hope it's not too late
for this merge window.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
Please read the FAQ at  http://www.tux.org/lkml/

WARNING: multiple messages have this Message-ID (diff)
From: Alexei Starovoitov <ast@plumgrid.com>
To: Daniel Wagner <daniel.wagner@bmw-carit.de>
Cc: "David S. Miller" <davem@davemloft.net>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Ingo Molnar <mingo@kernel.org>,
	linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH v2] bpf: BPF based latency tracing
Date: Fri, 19 Jun 2015 17:53:57 -0700	[thread overview]
Message-ID: <5584B9A5.9030602@plumgrid.com> (raw)
In-Reply-To: <1434722444-10200-1-git-send-email-daniel.wagner@bmw-carit.de>

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@bmw-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@plumgrid.com>

Dave,
this patch is for net-next and I hope it's not too late
for this merge window.

  reply	other threads:[~2015-06-20  0:54 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-06-19 14:00 [PATCH v2] bpf: BPF based latency tracing Daniel Wagner
2015-06-19 14:00 ` Daniel Wagner
2015-06-20  0:53 ` Alexei Starovoitov [this message]
2015-06-20  0:53   ` Alexei Starovoitov
2015-06-23 13:10   ` David Miller
2015-06-20  8:14 ` Daniel Borkmann
2015-06-20  8:14   ` Daniel Borkmann
2015-06-22  7:34   ` Daniel Wagner
2015-06-22  7:34     ` Daniel Wagner

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=5584B9A5.9030602@plumgrid.com \
    --to=ast@plumgrid.com \
    --cc=daniel.wagner@bmw-carit.de \
    --cc=daniel@iogearbox.net \
    --cc=davem@davemloft.net \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@kernel.org \
    --cc=netdev@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.