Hi Jean-Michel,
On Wed, Oct 23, 2024 at 11:07 AM Jean-Michel Hautbois
<jeanmichel.hautbois@xxxxxxxxxx> wrote:
On 23/10/2024 10:47, Steven Rostedt wrote:
On Tue, 22 Oct 2024 11:21:34 +0200
Jean-Michel Hautbois <jeanmichel.hautbois@xxxxxxxxxx> wrote:
I was not really expecting you to review the m68k one no :-).
I think I have other issues which might have impact on ftrace too.
For instance, when I launch cyclictest I have a warning about HRTIMERS:
# cyclictest -p 99
WARN: stat /dev/cpu_dma_latency failed: No such file or directory
WARN: High resolution timers not available
policy: fifo: loadavg: 1.21 0.40 0.14 1/122 245
T: 0 ( 245) P:99 I:1000 C: 11203 Min: 92 Act: 623 Avg: 775 Max:
3516
The latencies are quite high...
Yes, if you don't have high resolution timers, the latency will be high.
According to my config, I should have those:
CONFIG_HIGH_RES_TIMERS=y
Does your hardware have a high resolution timer, and do you have
a driver for it?
$ git grep hrtimer -- arch/m68k/
$
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
