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samples: philosophers: Enable thread awareness

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Enable thread awareness by default on philosophers sample.  It shows
gdb debugging output using the feature as reference.

Signed-off-by: Gerson Fernando Budke <nandojve@gmail.com>
This commit is contained in:
Gerson Fernando Budke 2021-08-29 10:55:10 -03:00 • committed by Christopher Friedt
commit b6c2ae8048
3 changed files with 84 additions and 0 deletions
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78
samples/philosophers/README.rst
View file

@ -63,3 +63,81 @@ Sample Output
Philosopher 5 [C:-2] THINKING [ 1700 ms ]
Exit QEMU by pressing :kbd:`CTRL+A` :kbd:`x`.
Debug Threads
*************
The philosophers sample by default enables :kconfig:`CONFIG_DEBUG_THREAD_INFO`.
This allows tools like OpenOCD and J-link to inspect thread data using
``info threads``.
.. zephyr-app-commands::
:zephyr-app: samples/philosophers
:host-os: unix
:board: <board_name>
:goals: debug
:compact:
OpenOCD Sample Output
=====================
.. code-block:: console
Thread 1 received signal SIGINT, Interrupt.
[Switching to Thread 537003160]
arch_cpu_idle () at zephyr/mainline/zephyr/arch/arm/core/aarch32/cpu_idle.S:107
107 cpsie i
(gdb) i threads
Id Target Id Frame
* 1 Thread 537003160 (Name: idle 00, prio:40,useropts:1) arch_cpu_idle () at zephyr/mainline/zephyr/arch/arm/core/aarch32/cpu_idle.S:107
Info : Getting thread 537002984 reg list
2 Thread 537002984 (Name: Philosopher 5, prio:-2,useropts:4) 0x08001404 in arch_irq_unlock (key=0) at zephyr/mainline/zephyr/include/arch/arm/aarch32/asm_inline_gcc.h:95
Info : Getting thread 537002808 reg list
3 Thread 537002808 (Name: Philosopher 4, prio:-1,useropts:4) 0x08001404 in arch_irq_unlock (key=0) at zephyr/mainline/zephyr/include/arch/arm/aarch32/asm_inline_gcc.h:95
Info : Getting thread 537002632 reg list
4 Thread 537002632 (Name: Philosopher 3, prio:0,useropts:4) 0x08001404 in arch_irq_unlock (key=0) at zephyr/mainline/zephyr/include/arch/arm/aarch32/asm_inline_gcc.h:95
Info : Getting thread 537002456 reg list
5 Thread 537002456 (Name: Philosopher 2, prio:1,useropts:4) 0x08001404 in arch_irq_unlock (key=0) at zephyr/mainline/zephyr/include/arch/arm/aarch32/asm_inline_gcc.h:95
Info : Getting thread 537002280 reg list
6 Thread 537002280 (Name: Philosopher 1, prio:2,useropts:4) 0x08001404 in arch_irq_unlock (key=0) at zephyr/mainline/zephyr/include/arch/arm/aarch32/asm_inline_gcc.h:95
Info : Getting thread 537002104 reg list
7 Thread 537002104 (Name: Philosopher 0, prio:3,useropts:4) 0x08001404 in arch_irq_unlock (key=0) at zephyr/mainline/zephyr/include/arch/arm/aarch32/asm_inline_gcc.h:95
.. code-block:: console
Philosopher 0 [P: 3] STARVING
Philosopher 1 [P: 2] HOLDING ONE FORK
Philosopher 2 [P: 1] EATING [ 400 ms ]
Philosopher 3 [P: 0] THINKING [ 525 ms ]
Philosopher 4 [C:-1] HOLDING ONE FORK
Philosopher 5 [C:-2] EATING [ 625 ms ]
J-Link Sample Output
====================
.. code-block:: console
Thread 2 received signal SIGTRAP, Trace/breakpoint trap.
[Switching to Thread 537920592]
arch_cpu_idle () at zephyr/mainline/zephyr/arch/arm/core/aarch32/cpu_idle.S:107
107 cpsie i
(gdb) i threads
Id Target Id Frame
* 2 Thread 537920592 (idle 00 UNKNOWN PRIO 40) arch_cpu_idle () at zephyr/mainline/zephyr/arch/arm/core/aarch32/cpu_idle.S:107
3 Thread 537919536 (Philosopher 0 PENDING PRIO 3) arch_swap (key=0) at zephyr/mainline/zephyr/arch/arm/core/aarch32/swap.c:53
4 Thread 537919712 (Philosopher 1 SUSPENDED PRIO 2) arch_swap (key=key@entry=0) at zephyr/mainline/zephyr/arch/arm/core/aarch32/swap.c:53
5 Thread 537919888 (Philosopher 2 SUSPENDED PRIO 1) arch_swap (key=key@entry=0) at zephyr/mainline/zephyr/arch/arm/core/aarch32/swap.c:53
6 Thread 537920064 (Philosopher 3 SUSPENDED PRIO 0) arch_swap (key=key@entry=0) at zephyr/mainline/zephyr/arch/arm/core/aarch32/swap.c:53
7 Thread 537920240 (Philosopher 4 PENDING PRIO 255) arch_swap (key=0) at zephyr/mainline/zephyr/arch/arm/core/aarch32/swap.c:53
8 Thread 537920416 (Philosopher 5 SUSPENDED PRIO 254) arch_swap (key=key@entry=0) at zephyr/mainline/zephyr/arch/arm/core/aarch32/swap.c:53
.. code-block:: console
Philosopher 0 [P: 3] STARVING
Philosopher 1 [P: 2] EATING [ 475 ms ]
Philosopher 2 [P: 1] THINKING [ 700 ms ]
Philosopher 3 [P: 0] THINKING [ 525 ms ]
Philosopher 4 [C:-1] HOLDING ONE FORK
Philosopher 5 [C:-2] EATING [ 625 ms ]

3
samples/philosophers/prj.conf
View file

@ -5,3 +5,6 @@ CONFIG_NUM_COOP_PRIORITIES=29
CONFIG_NUM_PREEMPT_PRIORITIES=40
CONFIG_SCHED_SCALABLE=y
CONFIG_MP_NUM_CPUS=1
#Enable thread awareness for debugging tools supporting it
CONFIG_DEBUG_THREAD_INFO=y

3
samples/philosophers/prj_tickless.conf
View file

@ -7,3 +7,6 @@ CONFIG_PM=y
CONFIG_TICKLESS_KERNEL=y
CONFIG_MP_NUM_CPUS=1
#Enable thread awareness for debugging tools supporting it
CONFIG_DEBUG_THREAD_INFO=y