From: Alexei Starovoitov
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
From: Alexei Starovoitov a...@plumgrid.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
On 06/20/2015 10:14 AM, Daniel Borkmann wrote:
> I think it would be useful to perhaps have two options:
>
> 1) User specifies a specific CPU and gets one such an output above.
Good point. Will do.
> 2) Summary view, i.e. to have the samples of each CPU for comparison
>next to each other in
On 06/20/2015 10:14 AM, Daniel Borkmann wrote:
I think it would be useful to perhaps have two options:
1) User specifies a specific CPU and gets one such an output above.
Good point. Will do.
2) Summary view, i.e. to have the samples of each CPU for comparison
next to each other in
On 06/19/2015 04:00 PM, 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.
The first array is used to store the start time stamp. The key is
On 06/19/2015 04:00 PM, 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.
The first array is used to store the start time stamp. The key is
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
...
With the rebase on net-next
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.
The first array is used to store the start time stamp. The key is the
CPU id. The second array stores the
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.wag...@bmw-carit.de
...
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.
The first array is used to store the start time stamp. The key is the
CPU id. The second array stores the
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