boards: qemu_cortex_r5: Enable QEMU icount emulation

This commit enables the QEMU icount emulation mode for improved timing stability. In normal emulation mode (without icount), the emulation timing of the TTC system timer is particularly unstable and this results in a high CI failure rate. For more details, refer to the issues zephyrproject-rtos#14173 and zephyrproject-rtos#22904. Signed-off-by: Stephanos Ioannidis <[email protected]>
hakehuang · Apr 30, 2020 · dffecdb · dffecdb
1 parent ea555f8
commit dffecdb
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/boards/arm/qemu_cortex_r5/board.cmake b/boards/arm/qemu_cortex_r5/board.cmake
@@ -9,6 +9,7 @@ set(QEMU_CPU_TYPE_${ARCH} cortex-r5)
 set(QEMU_FLAGS_${ARCH}
   -nographic
   -machine arm-generic-fdt
+  -icount shift=3,align=off,sleep=off -rtc clock=vm
   -dtb ${ZEPHYR_BASE}/boards/${ARCH}/${BOARD}/fdt-single_arch-zcu102-arm.dtb
   )