* Kernel tracer not available with lttng compiled in
@ 2019-09-05 12:23 Kjeld Flarup via lttng-dev
0 siblings, 0 replies; 3+ messages in thread
From: Kjeld Flarup via lttng-dev @ 2019-09-05 12:23 UTC (permalink / raw)
To: lttng-dev
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Hello
I'm trying to get lttng working on an Power PC board
~ # lttng create my-kernel-session --output=/tmp/my-kernel-trace
Spawning a session daemon
Session my-kernel-session created.
Traces will be written in /tmp/my-kernel-trace
~ # lttng list --kernel
Error: Unable to list kernel events: Kernel tracer not available
Error: Command error
Now ALL that I can find when googling this error is that the kernel modules is not loaded.
However I'm not using modules, but compile everything in.
Here is a small extract of what is enabled in my kernel. I have attached the full /proc/config.gz
Am I missing something?
CONFIG_NOP_TRACER=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_TRACER_MAX_TRACE=y
CONFIG_CONTEXT_SWITCH_TRACER=y
CONFIG_GENERIC_TRACER=y
CONFIG_FUNCTION_TRACER=y
CONFIG_FUNCTION_GRAPH_TRACER=y
CONFIG_IRQSOFF_TRACER=y
CONFIG_PREEMPT_TRACER=y
CONFIG_SCHED_TRACER=y
# CONFIG_HWLAT_TRACER is not set
CONFIG_TRACER_SNAPSHOT=y
CONFIG_TRACER_SNAPSHOT_PER_CPU_SWAP=y
# CONFIG_STACK_TRACER is not set
CONFIG_HAVE_KPROBES_ON_FTRACE=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_FTRACE=y
CONFIG_FTRACE_SYSCALLS=y
CONFIG_DYNAMIC_FTRACE=y
CONFIG_FTRACE_MCOUNT_RECORD=y
# CONFIG_FTRACE_STARTUP_TEST is not set
CONFIG_EVENT_TRACING=y
CONFIG_PERF_EVENTS=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_KRETPROBES=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_TRACEPOINTS=y
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
# CONFIG_TRACE_SINK is not set
CONFIG_TRACE_IRQFLAGS=y
CONFIG_TRACE_CLOCK=y
CONFIG_TRACE_PREEMPT_TOGGLE=y
CONFIG_TRACER_SNAPSHOT=y
CONFIG_TRACER_SNAPSHOT_PER_CPU_SWAP=y
# CONFIG_TRACEPOINT_BENCHMARK is not set
# CONFIG_TRACE_EVAL_MAP_FILE is not set
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_ALL is not set
CONFIG_KALLSYMS_BASE_RELATIVE=y
Regards
Kjeld Flarup
DEIF A/S, R&D Platform Software
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Kernel tracer not available with lttng compiled in
[not found] ` <20190905134826.GA15223@joraj-alpa>
@ 2019-09-06 7:30 ` Kjeld Flarup via lttng-dev
0 siblings, 0 replies; 3+ messages in thread
From: Kjeld Flarup via lttng-dev @ 2019-09-06 7:30 UTC (permalink / raw)
To: lttng-dev
Thanks for Your reply
I didn't notice the buildin support in the Readme. I think this will bring me further.
Regards
Kjeld Flarup
R&D Platform Software
________________________________________
From: Jonathan Rajotte-Julien <jonathan.rajotte-julien@efficios.com>
Sent: Thursday, September 5, 2019 3:48:26 PM
To: Kjeld Flarup
Cc: lttng-dev@lists.lttng.org
Subject: Re: [lttng-dev] Kernel tracer not available with lttng compiled in
Hi,
We will need more information.
What version of lttng are we speaking of here?
What kernel version/tree?
Exactly how did you build your kernel with lttng-modules built-in?
Did you follow this?:
https://github.com/lttng/lttng-modules/blob/master/README.md#kernel-built-in-support
Cheers
On Thu, Sep 05, 2019 at 12:23:40PM +0000, Kjeld Flarup via lttng-dev wrote:
> Hello
>
> I'm trying to get lttng working on an Power PC board
>
>
> ~ # lttng create my-kernel-session --output=/tmp/my-kernel-trace
> Spawning a session daemon
> Session my-kernel-session created.
> Traces will be written in /tmp/my-kernel-trace
> ~ # lttng list --kernel
> Error: Unable to list kernel events: Kernel tracer not available
> Error: Command error
>
> Now ALL that I can find when googling this error is that the kernel modules is not loaded.
> However I'm not using modules, but compile everything in.
>
> Here is a small extract of what is enabled in my kernel. I have attached the full /proc/config.gz
> Am I missing something?
>
> CONFIG_NOP_TRACER=y
> CONFIG_HAVE_FUNCTION_TRACER=y
> CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
> CONFIG_TRACER_MAX_TRACE=y
> CONFIG_CONTEXT_SWITCH_TRACER=y
> CONFIG_GENERIC_TRACER=y
> CONFIG_FUNCTION_TRACER=y
> CONFIG_FUNCTION_GRAPH_TRACER=y
> CONFIG_IRQSOFF_TRACER=y
> CONFIG_PREEMPT_TRACER=y
> CONFIG_SCHED_TRACER=y
> # CONFIG_HWLAT_TRACER is not set
> CONFIG_TRACER_SNAPSHOT=y
> CONFIG_TRACER_SNAPSHOT_PER_CPU_SWAP=y
> # CONFIG_STACK_TRACER is not set
>
> CONFIG_HAVE_KPROBES_ON_FTRACE=y
> CONFIG_HAVE_DYNAMIC_FTRACE=y
> CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
> CONFIG_FTRACE=y
> CONFIG_FTRACE_SYSCALLS=y
> CONFIG_DYNAMIC_FTRACE=y
> CONFIG_FTRACE_MCOUNT_RECORD=y
> # CONFIG_FTRACE_STARTUP_TEST is not set
>
>
> CONFIG_EVENT_TRACING=y
> CONFIG_PERF_EVENTS=y
> CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
>
> CONFIG_KRETPROBES=y
>
> CONFIG_HIGH_RES_TIMERS=y
> CONFIG_TRACEPOINTS=y
> CONFIG_TRACE_IRQFLAGS_SUPPORT=y
> # CONFIG_TRACE_SINK is not set
> CONFIG_TRACE_IRQFLAGS=y
> CONFIG_TRACE_CLOCK=y
> CONFIG_TRACE_PREEMPT_TOGGLE=y
> CONFIG_TRACER_SNAPSHOT=y
> CONFIG_TRACER_SNAPSHOT_PER_CPU_SWAP=y
> # CONFIG_TRACEPOINT_BENCHMARK is not set
> # CONFIG_TRACE_EVAL_MAP_FILE is not set
> CONFIG_KALLSYMS=y
> # CONFIG_KALLSYMS_ALL is not set
> CONFIG_KALLSYMS_BASE_RELATIVE=y
>
>
>
> Regards
> Kjeld Flarup
> DEIF A/S, R&D Platform Software
>
>
> _______________________________________________
> lttng-dev mailing list
> lttng-dev@lists.lttng.org
> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
--
Jonathan Rajotte-Julien
EfficiOS
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Kernel tracer not available with lttng compiled in
[not found] <94d50c14661146d4b8dcf57123c12c8b@deif.com>
@ 2019-09-05 13:48 ` Jonathan Rajotte-Julien
[not found] ` <20190905134826.GA15223@joraj-alpa>
1 sibling, 0 replies; 3+ messages in thread
From: Jonathan Rajotte-Julien @ 2019-09-05 13:48 UTC (permalink / raw)
To: Kjeld Flarup; +Cc: lttng-dev
Hi,
We will need more information.
What version of lttng are we speaking of here?
What kernel version/tree?
Exactly how did you build your kernel with lttng-modules built-in?
Did you follow this?:
https://github.com/lttng/lttng-modules/blob/master/README.md#kernel-built-in-support
Cheers
On Thu, Sep 05, 2019 at 12:23:40PM +0000, Kjeld Flarup via lttng-dev wrote:
> Hello
>
> I'm trying to get lttng working on an Power PC board
>
>
> ~ # lttng create my-kernel-session --output=/tmp/my-kernel-trace
> Spawning a session daemon
> Session my-kernel-session created.
> Traces will be written in /tmp/my-kernel-trace
> ~ # lttng list --kernel
> Error: Unable to list kernel events: Kernel tracer not available
> Error: Command error
>
> Now ALL that I can find when googling this error is that the kernel modules is not loaded.
> However I'm not using modules, but compile everything in.
>
> Here is a small extract of what is enabled in my kernel. I have attached the full /proc/config.gz
> Am I missing something?
>
> CONFIG_NOP_TRACER=y
> CONFIG_HAVE_FUNCTION_TRACER=y
> CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
> CONFIG_TRACER_MAX_TRACE=y
> CONFIG_CONTEXT_SWITCH_TRACER=y
> CONFIG_GENERIC_TRACER=y
> CONFIG_FUNCTION_TRACER=y
> CONFIG_FUNCTION_GRAPH_TRACER=y
> CONFIG_IRQSOFF_TRACER=y
> CONFIG_PREEMPT_TRACER=y
> CONFIG_SCHED_TRACER=y
> # CONFIG_HWLAT_TRACER is not set
> CONFIG_TRACER_SNAPSHOT=y
> CONFIG_TRACER_SNAPSHOT_PER_CPU_SWAP=y
> # CONFIG_STACK_TRACER is not set
>
> CONFIG_HAVE_KPROBES_ON_FTRACE=y
> CONFIG_HAVE_DYNAMIC_FTRACE=y
> CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
> CONFIG_FTRACE=y
> CONFIG_FTRACE_SYSCALLS=y
> CONFIG_DYNAMIC_FTRACE=y
> CONFIG_FTRACE_MCOUNT_RECORD=y
> # CONFIG_FTRACE_STARTUP_TEST is not set
>
>
> CONFIG_EVENT_TRACING=y
> CONFIG_PERF_EVENTS=y
> CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
>
> CONFIG_KRETPROBES=y
>
> CONFIG_HIGH_RES_TIMERS=y
> CONFIG_TRACEPOINTS=y
> CONFIG_TRACE_IRQFLAGS_SUPPORT=y
> # CONFIG_TRACE_SINK is not set
> CONFIG_TRACE_IRQFLAGS=y
> CONFIG_TRACE_CLOCK=y
> CONFIG_TRACE_PREEMPT_TOGGLE=y
> CONFIG_TRACER_SNAPSHOT=y
> CONFIG_TRACER_SNAPSHOT_PER_CPU_SWAP=y
> # CONFIG_TRACEPOINT_BENCHMARK is not set
> # CONFIG_TRACE_EVAL_MAP_FILE is not set
> CONFIG_KALLSYMS=y
> # CONFIG_KALLSYMS_ALL is not set
> CONFIG_KALLSYMS_BASE_RELATIVE=y
>
>
>
> Regards
> Kjeld Flarup
> DEIF A/S, R&D Platform Software
>
>
> _______________________________________________
> lttng-dev mailing list
> lttng-dev@lists.lttng.org
> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
--
Jonathan Rajotte-Julien
EfficiOS
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2019-09-06 7:30 UTC | newest]
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2019-09-05 12:23 Kernel tracer not available with lttng compiled in Kjeld Flarup via lttng-dev
[not found] <94d50c14661146d4b8dcf57123c12c8b@deif.com>
2019-09-05 13:48 ` Jonathan Rajotte-Julien
[not found] ` <20190905134826.GA15223@joraj-alpa>
2019-09-06 7:30 ` Kjeld Flarup via lttng-dev
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