devicetree.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
* [PATCH 0/8] ARM: dts: renesas: Add PMU device nodes
@ 2018-05-07 13:56 Geert Uytterhoeven
  2018-05-07 13:57 ` [PATCH 1/8] ARM: dts: r7s72100: Add PMU device node Geert Uytterhoeven
                   ` (9 more replies)
  0 siblings, 10 replies; 11+ messages in thread
From: Geert Uytterhoeven @ 2018-05-07 13:56 UTC (permalink / raw)
  To: Simon Horman, Magnus Damm
  Cc: linux-renesas-soc, devicetree, Geert Uytterhoeven,
	linux-arm-kernel

	Hi Simon, Magnus,

This patch series enables support for the ARM Performance Monitor Units
in Cortex-A7, Cortex-A9, and Cortex-A15 CPU cores on Renesas RZ/A1,
R-Car Gen2, and RZ/G1 SoCs.  This allows for better performance analysis
using the "perf" tool.

Sample output of "perf stat echo" on r8a7791/koelsch:

  - Before:

     Performance counter stats for 'echo':

	      2,636300      task-clock (msec)         #    0,265 CPUs utilized
		     8      context-switches          #    0,003 M/sec
		     0      cpu-migrations            #    0,000 K/sec
		    43      page-faults               #    0,016 M/sec
       <not supported>      cycles
       <not supported>      stalled-cycles-frontend
       <not supported>      stalled-cycles-backend
       <not supported>      instructions
       <not supported>      branches
       <not supported>      branch-misses

	   0,009960300 seconds time elapsed

  - After:

     Performance counter stats for 'echo':

	      2,455400      task-clock (msec)         #    0,273 CPUs utilized
		     3      context-switches          #    0,001 M/sec
		     0      cpu-migrations            #    0,000 K/sec
		    45      page-faults               #    0,018 M/sec
	     3.556.784      cycles                    #    1,449 GHz
       <not supported>      stalled-cycles-frontend
       <not supported>      stalled-cycles-backend
	     1.350.480      instructions              #    0,38  insns per cycle
	       335.542      branches                  #  136,655 M/sec
		18.075      branch-misses             #    5,39% of all branches

	   0,008987900 seconds time elapsed

Still missing:
  - R-Mobile APE6 (no PMU interrupt documented),
  - R-Car M1A and H1 (the PMU interrupt seems to be routed to the legacy
    SH INTC only?),
  - RZ/G1C (SMP support not yet upstream).

This has been tested on r8a7791/koelsch, and boot-tested on
r7s72100/genmai, r8a7790/lager, r8a7792/blanche, and r8a7794/silk.

Thanks!

Geert Uytterhoeven (8):
  ARM: dts: r7s72100: Add PMU device node
  ARM: dts: r8a7790: Add PMU device nodes
  ARM: dts: r8a7791: Add PMU device node
  ARM: dts: r8a7792: Add PMU device node
  ARM: dts: r8a7793: Add PMU device node
  ARM: dts: r8a7794: Add PMU device node
  ARM: dts: r8a7743: Add PMU device node
  ARM: dts: r8a7745: Add PMU device node

 arch/arm/boot/dts/r7s72100.dtsi |  5 +++++
 arch/arm/boot/dts/r8a7743.dtsi  |  7 +++++++
 arch/arm/boot/dts/r8a7745.dtsi  |  7 +++++++
 arch/arm/boot/dts/r8a7790.dtsi  | 18 ++++++++++++++++++
 arch/arm/boot/dts/r8a7791.dtsi  |  7 +++++++
 arch/arm/boot/dts/r8a7792.dtsi  |  7 +++++++
 arch/arm/boot/dts/r8a7793.dtsi  |  7 +++++++
 arch/arm/boot/dts/r8a7794.dtsi  |  7 +++++++
 8 files changed, 65 insertions(+)

-- 
2.7.4

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

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

^ permalink raw reply	[flat|nested] 11+ messages in thread

end of thread, other threads:[~2018-05-09 19:12 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2018-05-07 13:56 [PATCH 0/8] ARM: dts: renesas: Add PMU device nodes Geert Uytterhoeven
2018-05-07 13:57 ` [PATCH 1/8] ARM: dts: r7s72100: Add PMU device node Geert Uytterhoeven
2018-05-07 13:57 ` [PATCH 2/8] ARM: dts: r8a7790: Add PMU device nodes Geert Uytterhoeven
2018-05-07 13:57 ` [PATCH 3/8] ARM: dts: r8a7791: Add PMU device node Geert Uytterhoeven
2018-05-07 13:57 ` [PATCH 4/8] ARM: dts: r8a7792: " Geert Uytterhoeven
2018-05-07 13:57 ` [PATCH 5/8] ARM: dts: r8a7793: " Geert Uytterhoeven
2018-05-07 13:57 ` [PATCH 6/8] ARM: dts: r8a7794: " Geert Uytterhoeven
2018-05-07 13:57 ` [PATCH 7/8] ARM: dts: r8a7743: " Geert Uytterhoeven
2018-05-07 13:57 ` [PATCH 8/8] ARM: dts: r8a7745: " Geert Uytterhoeven
2018-05-09 14:39 ` [PATCH 0/8] ARM: dts: renesas: Add PMU device nodes Geert Uytterhoeven
2018-05-09 19:12 ` Simon Horman

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).