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Fix Task Manager CPU usage math

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boreddevnl 2026-04-17 09:42:43 +02:00
parent 0ad151d7fc
commit eaa02c9a5d
1 changed files with 12 additions and 23 deletions
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35
src/userland/gui/taskman.c
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@ -27,8 +27,8 @@ static int cpu_history[GRAPH_POINTS];
static int mem_history[GRAPH_POINTS];
static int history_idx = 0;
static uint64_t uptime_prev = 0;
static uint64_t kernel_ticks_prev = 0;
static uint64_t user_ticks_prev = 0;
static uint64_t total_ticks_prev = 0;
static uint64_t total_mem_system = 0;
static uint64_t used_mem_system = 0;
static char cpu_model_name[64] = "Unknown CPU";
@ -76,6 +76,7 @@ static void update_proc_list(void) {
proc_count = 0;
uint64_t user_ticks_now = 0;
uint64_t total_ticks_now = 0;
for (int i = 0; i < count; i++) {
if (entries[i].is_directory) {
@ -107,6 +108,7 @@ static void update_proc_list(void) {
proc_list[proc_count].used_memory = (size_t)find_value(buf, "Memory") * 1024;
uint64_t ticks = (uint64_t)find_value(buf, "Ticks");
proc_list[proc_count].ticks = ticks;
total_ticks_now += ticks;
proc_list[proc_count].is_idle = find_value(buf, "Idle") == 1;
@ -118,32 +120,19 @@ static void update_proc_list(void) {
}
}
// Global stats
int fd_u = sys_open("/proc/uptime", "r");
uint64_t uptime_now = 0;
if (fd_u >= 0) {
char buf[256];
int bytes = sys_read(fd_u, buf, 255);
sys_close(fd_u);
if (bytes > 0) {
buf[bytes] = 0;
uptime_now = (uint64_t)find_value(buf, "Raw_Ticks");
}
}
if (uptime_prev > 0) {
uint64_t total_delta = uptime_now - uptime_prev;
if (total_ticks_prev > 0) {
uint64_t total_delta = total_ticks_now - total_ticks_prev;
if (total_delta > 0) {
uint64_t used_delta = user_ticks_now - kernel_ticks_prev;
int cores = cpu_cores > 0 ? cpu_cores : 1;
int usage = (int)((used_delta * 100) / (total_delta * cores));
uint64_t used_delta = user_ticks_now - user_ticks_prev;
int usage = (int)((used_delta * 100) / total_delta);
if (usage > 100) usage = 100;
if (usage < 0) usage = 0;
cpu_history[history_idx] = usage;
}
}
uptime_prev = uptime_now;
kernel_ticks_prev = user_ticks_now;
user_ticks_prev = user_ticks_now;
total_ticks_prev = total_ticks_now;
int fd_m = sys_open("/proc/meminfo", "r");
if (fd_m >= 0) {