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neon 双核 benchmark #126

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12 changes: 9 additions & 3 deletions Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -2,8 +2,11 @@
# Makefile
#

CC ?= gcc
CXX ?= g++
CROSS_COMPILE ?= arm-none-linux-gnueabihf-
SYSROOT ?= /home/parallels/lukkey_aarch64_sysroot
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@cubic-dev-ai cubic-dev-ai bot Feb 23, 2026 •
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P2: Hardcoded machine-specific SYSROOT path breaks builds on other machines

Prompt for AI agents 
Check if this issue is valid — if so, understand the root cause and fix it. At Makefile, line 6:

<comment>Hardcoded machine-specific SYSROOT path breaks builds on other machines</comment>

<file context>
@@ -2,8 +2,11 @@
-CC              ?= gcc
-CXX             ?= g++
+CROSS_COMPILE   ?= arm-none-linux-gnueabihf-
+SYSROOT         ?= /home/parallels/lukkey_aarch64_sysroot
+
+CC              := $(CROSS_COMPILE)gcc
</file context>
Fix with Cubic


CC := $(CROSS_COMPILE)gcc
CXX := $(CROSS_COMPILE)g++
LVGL_DIR_NAME ?= lvgl
LVGL_DIR ?= .

Expand All @@ -13,9 +16,12 @@ WARNINGS := -Wall -Wshadow -Wundef -Wmissing-prototypes -Wno-discarded-qu
-Wno-ignored-qualifiers -Wno-error=pedantic -Wno-sign-compare -Wno-error=missing-prototypes -Wdouble-promotion -Wclobbered -Wdeprecated -Wempty-body \
-Wshift-negative-value -Wstack-usage=2048 -Wno-unused-value -std=gnu99
CFLAGS ?= -O3 -g0 -I$(LVGL_DIR)/ $(WARNINGS)
CFLAGS += --sysroot=$(SYSROOT) -I$(SYSROOT)/usr/include -I$(SYSROOT)/usr/include/drm \
-mcpu=cortex-a7 -mfpu=neon -mfloat-abi=hard -ffast-math
LDFLAGS ?= -lm
LDFLAGS += --sysroot=$(SYSROOT) -L$(SYSROOT)/usr/lib -ldrm -lpthread

BIN = main
BIN = lvgl_v95
BUILD_DIR = ./build
BUILD_OBJ_DIR = $(BUILD_DIR)/obj
BUILD_BIN_DIR = $(BUILD_DIR)/bin
Expand Down
58 changes: 29 additions & 29 deletions lv_conf.h
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Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,7 @@
*====================*/

/** Color depth: 1 (I1), 8 (L8), 16 (RGB565), 24 (RGB888), 32 (XRGB8888) */
#define LV_COLOR_DEPTH 16
#define LV_COLOR_DEPTH 32

/*=========================
STDLIB WRAPPER SETTINGS
Expand All @@ -39,7 +39,7 @@
* - LV_STDLIB_RTTHREAD: RT-Thread implementation
* - LV_STDLIB_CUSTOM: Implement the functions externally
*/
#define LV_USE_STDLIB_MALLOC LV_STDLIB_CLIB
#define LV_USE_STDLIB_MALLOC LV_STDLIB_BUILTIN

/** Possible values
* - LV_STDLIB_BUILTIN: LVGL's built in implementation
Expand Down Expand Up @@ -68,7 +68,7 @@

#if LV_USE_STDLIB_MALLOC == LV_STDLIB_BUILTIN
/** Size of memory available for `lv_malloc()` in bytes (>= 2kB) */
#define LV_MEM_SIZE (64 * 1024U) /**< [bytes] */
#define LV_MEM_SIZE (4 * 1024 * 1024)

/** Size of the memory expand for `lv_malloc()` in bytes */
#define LV_MEM_POOL_EXPAND_SIZE 0
Expand All @@ -87,7 +87,7 @@
*====================*/

/** Default display refresh, input device read and animation step period. */
#define LV_DEF_REFR_PERIOD 33 /**< [ms] */
#define LV_DEF_REFR_PERIOD 10 /**< [ms] 100fps */

/** Default Dots Per Inch. Used to initialize default sizes such as widgets sized, style paddings.
* (Not so important, you can adjust it to modify default sizes and spaces.) */
Expand All @@ -106,7 +106,7 @@
* - LV_OS_MQX
* - LV_OS_SDL2
* - LV_OS_CUSTOM */
#define LV_USE_OS LV_OS_NONE
#define LV_USE_OS LV_OS_PTHREAD

#if LV_USE_OS == LV_OS_CUSTOM
#define LV_OS_CUSTOM_INCLUDE <stdint.h>
Expand All @@ -125,7 +125,7 @@
*========================*/

/** Align stride of all layers and images to this bytes */
#define LV_DRAW_BUF_STRIDE_ALIGN 1
#define LV_DRAW_BUF_STRIDE_ALIGN 16

/** Align start address of draw_buf addresses to this bytes*/
#define LV_DRAW_BUF_ALIGN 4
Expand All @@ -142,7 +142,7 @@
* and can't be drawn in chunks. */

/** The target buffer size for simple layer chunks. */
#define LV_DRAW_LAYER_SIMPLE_BUF_SIZE (24 * 1024) /**< [bytes]*/
#define LV_DRAW_LAYER_SIMPLE_BUF_SIZE (1500 * 1024) /**< [bytes]*/

/* Limit the max allocated memory for simple and transformed layers.
* It should be at least `LV_DRAW_LAYER_SIMPLE_BUF_SIZE` sized but if transformed layers are also used
Expand All @@ -153,7 +153,7 @@
/** Stack size of drawing thread.
* NOTE: If FreeType or ThorVG is enabled, it is recommended to set it to 32KB or more.
*/
#define LV_DRAW_THREAD_STACK_SIZE (8 * 1024) /**< [bytes]*/
#define LV_DRAW_THREAD_STACK_SIZE (32 * 1024) /**< [bytes]*/

/** Thread priority of the drawing task.
* Higher values mean higher priority.
Expand Down Expand Up @@ -191,7 +191,7 @@
/** Set number of draw units.
* - > 1 requires operating system to be enabled in `LV_USE_OS`.
* - > 1 means multiple threads will render the screen in parallel. */
#define LV_DRAW_SW_DRAW_UNIT_CNT 1
#define LV_DRAW_SW_DRAW_UNIT_CNT 2

/** Use Arm-2D to accelerate software (sw) rendering. */
#define LV_USE_DRAW_ARM2D_SYNC 0
Expand All @@ -208,16 +208,16 @@
/** Allow buffering some shadow calculation.
* LV_DRAW_SW_SHADOW_CACHE_SIZE is the maximum shadow size to buffer, where shadow size is
* `shadow_width + radius`. Caching has LV_DRAW_SW_SHADOW_CACHE_SIZE^2 RAM cost. */
#define LV_DRAW_SW_SHADOW_CACHE_SIZE 0
#define LV_DRAW_SW_SHADOW_CACHE_SIZE 24

/** Set number of maximally-cached circle data.
* The circumference of 1/4 circle are saved for anti-aliasing.
* `radius * 4` bytes are used per circle (the most often used radiuses are saved).
* - 0: disables caching */
#define LV_DRAW_SW_CIRCLE_CACHE_SIZE 4
#define LV_DRAW_SW_CIRCLE_CACHE_SIZE 16
#endif

#define LV_USE_DRAW_SW_ASM LV_DRAW_SW_ASM_NONE
#define LV_USE_DRAW_SW_ASM LV_DRAW_SW_ASM_NEON

#if LV_USE_DRAW_SW_ASM == LV_DRAW_SW_ASM_CUSTOM
#define LV_DRAW_SW_ASM_CUSTOM_INCLUDE ""
Expand Down Expand Up @@ -502,11 +502,11 @@

/* Enable assertion failures if an operation fails or invalid data is found.
* If LV_USE_LOG is enabled, an error message will be printed on failure. */
#define LV_USE_ASSERT_NULL 1 /**< Check if the parameter is NULL. (Very fast, recommended) */
#define LV_USE_ASSERT_MALLOC 1 /**< Checks is the memory is successfully allocated or no. (Very fast, recommended) */
#define LV_USE_ASSERT_STYLE 1
#define LV_USE_ASSERT_MEM_INTEGRITY 1
#define LV_USE_ASSERT_OBJ 1
#define LV_USE_ASSERT_NULL 1 /**< Disabled for benchmark performance */
#define LV_USE_ASSERT_MALLOC 1 /**< Disabled for benchmark performance */
#define LV_USE_ASSERT_STYLE 0
#define LV_USE_ASSERT_MEM_INTEGRITY 0
#define LV_USE_ASSERT_OBJ 0

/** Add a custom handler when assert happens e.g. to restart MCU. */
#define LV_ASSERT_HANDLER_INCLUDE <stdint.h>
Expand Down Expand Up @@ -543,11 +543,11 @@
* If size is not set to 0, the decoder will fail to decode when the cache is full.
* If size is 0, the cache function is not enabled and the decoded memory will be
* released immediately after use. */
#define LV_CACHE_DEF_SIZE 0
#define LV_CACHE_DEF_SIZE (512 * 1024)

/** Default number of image header cache entries. The cache is used to store the headers of images
* The main logic is like `LV_CACHE_DEF_SIZE` but for image headers. */
#define LV_IMAGE_HEADER_CACHE_DEF_CNT 0
#define LV_IMAGE_HEADER_CACHE_DEF_CNT 32

/** Number of stops allowed per gradient. Increase this to allow more stops.
* This adds (sizeof(lv_color_t) + 1) bytes per additional stop. */
Expand Down Expand Up @@ -821,7 +821,7 @@

#define LV_USE_LIST 1

#define LV_USE_LOTTIE 1
#define LV_USE_LOTTIE 0

#define LV_USE_MENU 1

Expand Down Expand Up @@ -1049,11 +1049,11 @@
* Requires `LV_USE_MATRIX = 1`
* and a rendering engine supporting vector graphics, e.g.
* (LV_USE_DRAW_SW and LV_USE_THORVG) or LV_USE_DRAW_VG_LITE or LV_USE_NEMA_VG. */
#define LV_USE_VECTOR_GRAPHIC 1
#define LV_USE_VECTOR_GRAPHIC 0

/** Enable ThorVG (vector graphics library) from the src/libs folder.
* Requires LV_USE_VECTOR_GRAPHIC */
#define LV_USE_THORVG_INTERNAL 1
#define LV_USE_THORVG_INTERNAL 0

/** Enable ThorVG by assuming that its installed and linked to the project
* Requires LV_USE_VECTOR_GRAPHIC */
Expand Down Expand Up @@ -1095,7 +1095,7 @@
#define LV_USE_SNAPSHOT 0

/** 1: Enable system monitor component */
#define LV_USE_SYSMON 0
#define LV_USE_SYSMON 1
#if LV_USE_SYSMON
/** Get the idle percentage. E.g. uint32_t my_get_idle(void); */
#define LV_SYSMON_GET_IDLE lv_os_get_idle_percent
Expand All @@ -1109,12 +1109,12 @@

/** 1: Show CPU usage and FPS count.
* - Requires `LV_USE_SYSMON = 1` */
#define LV_USE_PERF_MONITOR 0
#define LV_USE_PERF_MONITOR 1
#if LV_USE_PERF_MONITOR
#define LV_USE_PERF_MONITOR_POS LV_ALIGN_BOTTOM_RIGHT

/** 0: Displays performance data on the screen; 1: Prints performance data using log. */
#define LV_USE_PERF_MONITOR_LOG_MODE 0
#define LV_USE_PERF_MONITOR_LOG_MODE 1
#endif

/** 1: Show used memory and memory fragmentation.
Expand Down Expand Up @@ -1295,7 +1295,7 @@
#endif

/** Driver for /dev/fb */
#define LV_USE_LINUX_FBDEV 1
#define LV_USE_LINUX_FBDEV 0
#if LV_USE_LINUX_FBDEV
#define LV_LINUX_FBDEV_BSD 0
#define LV_LINUX_FBDEV_RENDER_MODE LV_DISPLAY_RENDER_MODE_PARTIAL
Expand Down Expand Up @@ -1346,7 +1346,7 @@
#endif

/** Driver for /dev/dri/card */
#define LV_USE_LINUX_DRM 0
#define LV_USE_LINUX_DRM 1

#if LV_USE_LINUX_DRM

Expand All @@ -1369,7 +1369,7 @@
#endif /*LV_USE_LOVYAN_GFX*/

/** Driver for evdev input devices */
#define LV_USE_EVDEV 1
#define LV_USE_EVDEV 0

/** Driver for libinput input devices */
#define LV_USE_LIBINPUT 0
Expand Down Expand Up @@ -1469,7 +1469,7 @@

#if LV_USE_DEMO_BENCHMARK
/** Use fonts where bitmaps are aligned 16 byte and has Nx16 byte stride */
#define LV_DEMO_BENCHMARK_ALIGNED_FONTS 0
#define LV_DEMO_BENCHMARK_ALIGNED_FONTS 1
#endif

/** Render test for each primitive.
Expand Down
7 changes: 3 additions & 4 deletions src/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -82,8 +82,8 @@ static void configure_simulator(int argc, char **argv)
const char *env_w = getenv("LV_SIM_WINDOW_WIDTH");
const char *env_h = getenv("LV_SIM_WINDOW_HEIGHT");
/* Default values */
settings.window_width = atoi(env_w ? env_w : "800");
settings.window_height = atoi(env_h ? env_h : "480");
settings.window_width = 480;
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@cubic-dev-ai cubic-dev-ai bot Feb 23, 2026 •
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P1: Environment variables LV_SIM_WINDOW_WIDTH/HEIGHT are read but never used, leaving dead code and silently breaking deployments that rely on env var window sizing. The variables env_w and env_h have no effect on the program.

Prompt for AI agents 
Check if this issue is valid — if so, understand the root cause and fix it. At src/main.c, line 85:

<comment>Environment variables LV_SIM_WINDOW_WIDTH/HEIGHT are read but never used, leaving dead code and silently breaking deployments that rely on env var window sizing. The variables env_w and env_h have no effect on the program.</comment>

<file context>
@@ -82,8 +82,8 @@ static void configure_simulator(int argc, char **argv)
     /* Default values */
-    settings.window_width = atoi(env_w ? env_w : "800");
-    settings.window_height = atoi(env_h ? env_h : "480");
+    settings.window_width = 480;
+    settings.window_height = 800;
 
</file context>
Fix with Cubic

settings.window_height = 800;

/* Parse the command-line options. */
while ((opt = getopt (argc, argv, "b:fmW:H:BVh")) != -1) {
Expand Down Expand Up @@ -150,8 +150,7 @@ int main(int argc, char **argv)
#endif

/*Create a Demo*/
lv_demo_widgets();
lv_demo_widgets_start_slideshow();
lv_demo_benchmark();

/* Enter the run loop of the selected backend */
driver_backends_run_loop();
Expand Down
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