* trace over network is supported?
@ 2010-09-09 11:29 Masami Hiramatsu
2010-09-09 14:21 ` Frank Ch. Eigler
0 siblings, 1 reply; 5+ messages in thread
From: Masami Hiramatsu @ 2010-09-09 11:29 UTC (permalink / raw)
To: systemtap
Hi,
As far as I know, systemtap still doesn't support
tracing over network (remote tracing), does it?
If so, is there any plan to support it?
Thank you,
--
Masami HIRAMATSU
2nd Dept. Linux Technology Center
Hitachi, Ltd., Systems Development Laboratory
E-mail: masami.hiramatsu.pt@hitachi.com
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: trace over network is supported?
2010-09-09 11:29 trace over network is supported? Masami Hiramatsu
@ 2010-09-09 14:21 ` Frank Ch. Eigler
2010-09-10 6:48 ` Masami Hiramatsu
0 siblings, 1 reply; 5+ messages in thread
From: Frank Ch. Eigler @ 2010-09-09 14:21 UTC (permalink / raw)
To: Masami Hiramatsu; +Cc: systemtap
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> writes:
> As far as I know, systemtap still doesn't support tracing over
> network (remote tracing), does it?
One can invoke stap over an ssh or similar connection, so to that
extent, "yes, it can.". What do you mean exactly?
> If so, is there any plan to support it?
Actually, we are in the planning stages of two or three new orthogonal
efforts in this area.
- FChE
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: trace over network is supported?
2010-09-09 14:21 ` Frank Ch. Eigler
@ 2010-09-10 6:48 ` Masami Hiramatsu
[not found] ` <AANLkTi=w3YfnZhKerWiSsd0RpcgJi61Xufr8JRXJzVO5@mail.gmail.com>
2010-09-10 13:21 ` Frank Ch. Eigler
0 siblings, 2 replies; 5+ messages in thread
From: Masami Hiramatsu @ 2010-09-10 6:48 UTC (permalink / raw)
To: Frank Ch. Eigler; +Cc: systemtap
(2010/09/09 23:21), Frank Ch. Eigler wrote:
> Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> writes:
>
>> As far as I know, systemtap still doesn't support tracing over
>> network (remote tracing), does it?
>
> One can invoke stap over an ssh or similar connection, so to that
> extent, "yes, it can.". What do you mean exactly?
Yeah, I know about tracing over ssh connection, but
that is too heavy to record high-freq system events
(e.g. systemcalls).
I meant that something like trace-data listener and
sender over UDP or TCP.
Thank you,
>> If so, is there any plan to support it?
>
> Actually, we are in the planning stages of two or three new orthogonal
> efforts in this area.
>
> - FChE
^ permalink raw reply [flat|nested] 5+ messages in thread
* trace over network is supported?
[not found] ` <AANLkTi=w3YfnZhKerWiSsd0RpcgJi61Xufr8JRXJzVO5@mail.gmail.com>
@ 2010-09-10 7:46 ` Tim Beaulen
0 siblings, 0 replies; 5+ messages in thread
From: Tim Beaulen @ 2010-09-10 7:46 UTC (permalink / raw)
To: systemtap
On Fri, Sep 10, 2010 at 8:48 AM, Masami Hiramatsu
<masami.hiramatsu.pt@hitachi.com> wrote:
>
> Yeah, I know about tracing over ssh connection, but
> that is too heavy to record high-freq system events
> (e.g. systemcalls).
>
> I meant that something like trace-data listener and
> sender over UDP or TCP.
>
You can use bash redirection too I guess.
example: put all the stap output to a tcp connection:
stap ... &> /dev/tcp/hostname/port
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: trace over network is supported?
2010-09-10 6:48 ` Masami Hiramatsu
[not found] ` <AANLkTi=w3YfnZhKerWiSsd0RpcgJi61Xufr8JRXJzVO5@mail.gmail.com>
@ 2010-09-10 13:21 ` Frank Ch. Eigler
1 sibling, 0 replies; 5+ messages in thread
From: Frank Ch. Eigler @ 2010-09-10 13:21 UTC (permalink / raw)
To: Masami Hiramatsu; +Cc: systemtap
Hi, Masami -
> > One can invoke stap over an ssh or similar connection, so to that
> > extent, "yes, it can.". What do you mean exactly?
>
> Yeah, I know about tracing over ssh connection, but
> that is too heavy to record high-freq system events
> (e.g. systemcalls).
>
> I meant that something like trace-data listener and
> sender over UDP or TCP.
If the heaviness comes from the encryption provided by ssh, then one
can tie stap straight to tcp/udp sockets with wrappers like netcat.
Beyond some copy-elimination a la splice(2), do you think there is
much to be done?
- FChE
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2010-09-10 13:21 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2010-09-09 11:29 trace over network is supported? Masami Hiramatsu
2010-09-09 14:21 ` Frank Ch. Eigler
2010-09-10 6:48 ` Masami Hiramatsu
[not found] ` <AANLkTi=w3YfnZhKerWiSsd0RpcgJi61Xufr8JRXJzVO5@mail.gmail.com>
2010-09-10 7:46 ` Tim Beaulen
2010-09-10 13:21 ` Frank Ch. Eigler
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