On Wed, Nov 08, 2017 at 02:19:07PM -0500, Steven Rostedt wrote:
> On Wed, 8 Nov 2017 20:07:27 +0100
> Peter Zijlstra wrote:
>
> > Depends on how early you need things; ideally you'd be able to use the
>
> Well, he starts tracing at the entry of start_kernel(), would this
> handle that?
You'll h
On Wed, 8 Nov 2017 20:07:27 +0100
Peter Zijlstra wrote:
> Depends on how early you need things; ideally you'd be able to use the
Well, he starts tracing at the entry of start_kernel(), would this
handle that?
-- Steve
> stuff from here:
>
>
> https://lkml.kernel.org/r/1504116205-355281-1-g
On Wed, 08 Nov 2017 18:44:39 +
Abderrahmane Benbachir wrote:
> I implemented the ring_buffer_set_clock solution and I have some questions.
>
>
> void __init ftrace_early_fill_ringbuffer(void *data)
> {
> ...
> ring_buffer_set_clock(tr->trace_buffer.buffer, early_trace_clock);
>
On Wed, Nov 08, 2017 at 11:07:57AM -0500, Steven Rostedt wrote:
> On Wed, 8 Nov 2017 09:10:58 +0100
> Peter Zijlstra wrote:
>
> > On Tue, Nov 07, 2017 at 09:17:06PM -0500, Steven Rostedt wrote:
> > > > +#ifdef CONFIG_X86_TSC
> > > > + entry->clock = rdtsc();
> > > > +#else
> > > > + e
I implemented the ring_buffer_set_clock solution and I have some questions.
void __init ftrace_early_fill_ringbuffer(void *data)
{
...
ring_buffer_set_clock(tr->trace_buffer.buffer, early_trace_clock);
preempt_disable_notrace();
for (i = 0; i < vearly_entries_count; i++)
On Wed, 8 Nov 2017 09:10:58 +0100
Peter Zijlstra wrote:
> On Tue, Nov 07, 2017 at 09:17:06PM -0500, Steven Rostedt wrote:
> > > +#ifdef CONFIG_X86_TSC
> > > + entry->clock = rdtsc();
> > > +#else
> > > + entry->clock = trace_clock_local();
> > > +#endif
>
> > > +#ifdef CONFIG_X86_TSC
> > > + c
Steven Rostedt a écrit :
ring_buffer_set_clock(tr->trace_buffer.buffer,
early_trace_clock);
Then have:
static u64 early_timestamp __initdata;
static __init u64 early_trace_clock(void)
{
return early_timestamp;
}
Then we can have:
+ p
On Tue, Nov 07, 2017 at 09:17:06PM -0500, Steven Rostedt wrote:
> > +#ifdef CONFIG_X86_TSC
> > + entry->clock = rdtsc();
> > +#else
> > + entry->clock = trace_clock_local();
> > +#endif
> > +#ifdef CONFIG_X86_TSC
> > + cpu_khz = native_calibrate_cpu();
> > +#endif
> > +#ifdef CONFIG_X86_TSC
On Tue, 07 Nov 2017 18:44:05 -0500
Abderrahmane Benbachir wrote:
> Hi Steve,
>
> I updated the patch with all the fixes except for update timestamp part.
>
> I used ftrace_export as you suggested, but I don't know how to hook to
> ringbuffer to update the timestamp, I used the same way as befo
Hi Steve,
I updated the patch with all the fixes except for update timestamp part.
I used ftrace_export as you suggested, but I don't know how to hook to
ringbuffer to update the timestamp, I used the same way as before to
update the time_delta in function ftrace_vearly_export_write.
static u64
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