diff options
| -rw-r--r-- | procps/powertop.c | 377 |
1 files changed, 185 insertions, 192 deletions
diff --git a/procps/powertop.c b/procps/powertop.c index f35aa5c..4b41054 100644 --- a/procps/powertop.c +++ b/procps/powertop.c @@ -19,20 +19,27 @@ //config: help //config: Analyze power consumption on Intel-based laptops +// XXX This should de configurable +#define ENABLE_FEATURE_POWERTOP_PROCIRQ 1 + #include "libbb.h" + //#define debug(fmt, ...) fprintf(stderr, fmt, ## __VA_ARGS__) #define debug(fmt, ...) ((void)0) -// XXX This should not be here -#define ENABLE_FEATURE_POWERTOP_PROCIRQ 1 + +#define BLOATY_HPET_IRQ_NUM_DETECTION 0 +#define MAX_CSTATE_COUNT 8 +#define IRQCOUNT 40 + #define DEFAULT_SLEEP 10 #define DEFAULT_SLEEP_STR "10" /* Frequency of the ACPI timer */ #define FREQ_ACPI 3579.545 -#define FREQ_ACPI_1000 3579545 +#define FREQ_ACPI_1000 3579545 /* Max filename length of entry in /sys/devices subsystem */ #define BIG_SYSNAME_LEN 16 @@ -42,14 +49,12 @@ typedef unsigned long long ullong; struct line { char *string; int count; - int disk_count; + /*int disk_count;*/ }; #if ENABLE_FEATURE_POWERTOP_PROCIRQ -#define IRQCOUNT 40 - struct irqdata { - int active; + smallint active; int number; ullong count; char irq_desc[32]; @@ -57,26 +62,28 @@ struct irqdata { #endif struct globals { - bool timer_list_read; - smallint nostats; - int headline; - int nlines; + int lines_cnt; + int lines_cumulative_count; int linesize; int maxcstate; + unsigned total_cpus; + struct line *lines; + smallint cant_enable_timer_stats; #if ENABLE_FEATURE_POWERTOP_PROCIRQ - int total_interrupt; - int interrupt_0; +# if BLOATY_HPET_IRQ_NUM_DETECTION + smallint scanned_timer_list; int percpu_hpet_start; int percpu_hpet_end; +# endif + int interrupt_0; + int total_interrupt; struct irqdata interrupts[IRQCOUNT]; #endif - unsigned total_cpus; - ullong start_usage[8]; - ullong last_usage[8]; - ullong start_duration[8]; - ullong last_duration[8]; - char cstate_names[8][16]; - struct line *lines; + ullong start_usage[MAX_CSTATE_COUNT]; + ullong last_usage[MAX_CSTATE_COUNT]; + ullong start_duration[MAX_CSTATE_COUNT]; + ullong last_duration[MAX_CSTATE_COUNT]; + char cstate_names[MAX_CSTATE_COUNT][16]; #if ENABLE_FEATURE_USE_TERMIOS struct termios init_settings; #endif @@ -95,7 +102,7 @@ static void reset_term(void) static void sig_handler(int signo UNUSED_PARAM) { reset_term(); - exit(EXIT_FAILURE); + _exit(EXIT_FAILURE); } #endif @@ -116,40 +123,35 @@ static int write_str_to_file(const char *fname, const char *str) static void NOINLINE clear_lines(void) { int i; - - for (i = 0; i < G.headline; i++) + for (i = 0; i < G.lines_cnt; i++) free(G.lines[i].string); free(G.lines); - G.headline = G.linesize = 0; + G.lines_cnt = 0; + G.linesize = 0; G.lines = NULL; } -static void count_lines(void) +static void update_lines_cumulative_count(void) { int i; - - for (i = 0; i < G.headline; i++) - G.nlines += G.lines[i].count; + for (i = 0; i < G.lines_cnt; i++) + G.lines_cumulative_count += G.lines[i].count; } static int line_compare(const void *p1, const void *p2) { const struct line *a = p1; const struct line *b = p2; - - return (b->count + 50 * b->disk_count) - (a->count + 50 * a->disk_count); + return (b->count /*+ 50 * b->disk_count*/) - (a->count /*+ 50 * a->disk_count*/); } -static void do_sort(void) +static void sort_lines(void) { - qsort(G.lines, G.headline, sizeof(struct line), line_compare); + qsort(G.lines, G.lines_cnt, sizeof(G.lines[0]), line_compare); } -/* - * Save C-state names, usage and duration. Also get maxcstate. - * Reads data from /proc. - */ -static void read_data(ullong *usage, ullong *duration) +/* Save C-state usage and duration. Also update maxcstate. */ +static void read_cstate_counts(ullong *usage, ullong *duration) { DIR *dir; struct dirent *d; @@ -161,10 +163,10 @@ static void read_data(ullong *usage, ullong *duration) while ((d = readdir(dir)) != NULL) { FILE *fp; char buf[192]; - int level = 0; + int level; int len; - len = strlen(d->d_name); + len = strlen(d->d_name); /* "CPUnn" */ if (len < 3 || len > BIG_SYSNAME_LEN) continue; @@ -173,28 +175,31 @@ static void read_data(ullong *usage, ullong *duration) if (!fp) continue; +// Example file contents: +// active state: C0 +// max_cstate: C8 +// maximum allowed latency: 2000000000 usec +// states: +// C1: type[C1] promotion[--] demotion[--] latency[001] usage[00006173] duration[00000000000000000000] +// C2: type[C2] promotion[--] demotion[--] latency[001] usage[00085191] duration[00000000000083024907] +// C3: type[C3] promotion[--] demotion[--] latency[017] usage[01017622] duration[00000000017921327182] + level = 0; while (fgets(buf, sizeof(buf), fp)) { - char *p; - - /* Get usage */ - p = strstr(buf, "age["); + char *p = strstr(buf, "age["); if (!p) continue; p += 4; usage[level] += bb_strtoull(p, NULL, 10) + 1; - - /* Get duration */ p = strstr(buf, "ation["); if (!p) continue; p += 6; duration[level] += bb_strtoull(p, NULL, 10); - /* Increment level */ + if (level >= MAX_CSTATE_COUNT-1) + break; level++; - - /* Also update maxcstate */ - if (level > G.maxcstate) + if (level > G.maxcstate) /* update maxcstate */ G.maxcstate = level; } fclose(fp); @@ -203,15 +208,10 @@ static void read_data(ullong *usage, ullong *duration) } /* Add line and/or update count */ -static void push_line(const char *string, int count) +static void save_line(const char *string, int count) { int i; - - if (!string) - return; - - /* Loop through entries */ - for (i = 0; i < G.headline; i++) { + for (i = 0; i < G.lines_cnt; i++) { if (strcmp(string, G.lines[i].string) == 0) { /* It's already there, only update count */ G.lines[i].count += count; @@ -219,28 +219,27 @@ static void push_line(const char *string, int count) } } - G.lines = xrealloc_vector(G.lines, 1, G.headline); - - G.lines[G.headline].string = xstrdup(string); - G.lines[G.headline].count = count; - G.lines[G.headline].disk_count = 0; - - /* We added a line */ - G.headline++; + /* Add new line */ + G.lines = xrealloc_vector(G.lines, 1, G.lines_cnt); + G.lines[G.lines_cnt].string = xstrdup(string); + G.lines[G.lines_cnt].count = count; + /*G.lines[G.lines_cnt].disk_count = 0;*/ + G.lines_cnt++; } #if ENABLE_FEATURE_POWERTOP_PROCIRQ -static int percpu_hpet_timer(const char *name) +static int is_hpet_irq(const char *name) { char *p; +# if BLOATY_HPET_IRQ_NUM_DETECTION long hpet_chan; - /* This is done once */ - if (!G.timer_list_read) { + /* Learn the range of existing hpet timers. This is done once */ + if (!G.scanned_timer_list) { FILE *fp; char buf[80]; - G.timer_list_read = true; + G.scanned_timer_list = true; fp = fopen_for_read("/proc/timer_list"); if (!fp) return 0; @@ -250,7 +249,7 @@ static int percpu_hpet_timer(const char *name) if (!p) continue; p += sizeof("Clock Event Device: hpet")-1; - if (!isdigit(p[0])) + if (!isdigit(*p)) continue; hpet_chan = xatoi_positive(p); if (hpet_chan < G.percpu_hpet_start) @@ -260,49 +259,46 @@ static int percpu_hpet_timer(const char *name) } fclose(fp); } - +# endif +//TODO: optimize p = strstr(name, "hpet"); if (!p) return 0; - p += 4; - if (!isdigit(p[0])) + if (!isdigit(*p)) return 0; - +# if BLOATY_HPET_IRQ_NUM_DETECTION hpet_chan = xatoi_positive(p); - if (G.percpu_hpet_start <= hpet_chan && hpet_chan <= G.percpu_hpet_end) - return 1; - - return 0; + if (hpet_chan < G.percpu_hpet_start || hpet_chan > G.percpu_hpet_end) + return 0; +# endif + return 1; } -static int update_irq(int irq, ullong count) +/* Save new IRQ count, return delta from old one */ +static int save_irq_count(int irq, ullong count) { int unused = IRQCOUNT; int i; - for (i = 0; i < IRQCOUNT; i++) { if (G.interrupts[i].active && G.interrupts[i].number == irq) { - ullong old; - old = G.interrupts[i].count; + ullong old = G.interrupts[i].count; G.interrupts[i].count = count; return count - old; } if (!G.interrupts[i].active && unused > i) unused = i; } - - G.interrupts[unused].active = 1; - G.interrupts[unused].count = count; - G.interrupts[unused].number = irq; - + if (unused < IRQCOUNT) { + G.interrupts[unused].active = 1; + G.interrupts[unused].count = count; + G.interrupts[unused].number = irq; + } return count; } -/* - * Read /proc/interrupts, save IRQ counts and IRQ description. - */ -static void do_proc_irq(void) +/* Read /proc/interrupts, save IRQ counts and IRQ description */ +static void process_irq_count_deltas(void) { FILE *fp; char buf[128]; @@ -316,12 +312,10 @@ static void do_proc_irq(void) char irq_desc[sizeof(" <kernel IPI> : ") + sizeof(buf)]; char *p; const char *name; - int nr = -1; + int nr; ullong count; ullong delta; - int special; - /* Skip header */ p = strchr(buf, ':'); if (!p) continue; @@ -329,8 +323,9 @@ static void do_proc_irq(void) * ^ */ /* Deal with non-maskable interrupts -- make up fake numbers */ - special = 0; + nr = -1; if (buf[0] != ' ' && !isdigit(buf[0])) { +//TODO: optimize if (strncmp(buf, "NMI:", 4) == 0) nr = 20000; if (strncmp(buf, "RES:", 4) == 0) @@ -345,10 +340,9 @@ static void do_proc_irq(void) nr = 20005; if (strncmp(buf, "SPU:", 4) == 0) nr = 20006; - special = 1; } else { - /* bb_strtou don't eat leading spaces, using strtoul */ - nr = strtoul(buf, NULL, 10); /* xato*() wouldn't work */ + /* bb_strtou doesn't eat leading spaces, using strtoul */ + nr = strtoul(buf, NULL, 10); } if (nr == -1) continue; @@ -357,7 +351,7 @@ static void do_proc_irq(void) /* 0: 143646045 153901007 IO-APIC-edge timer * ^ */ - /* Count sum of the IRQs */ + /* Sum counts for this IRQ */ count = 0; while (1) { char *tmp; @@ -371,7 +365,7 @@ static void do_proc_irq(void) * NMI: 1 2 Non-maskable interrupts * ^ */ - if (!special) { + if (nr < 20000) { /* Skip to the interrupt name, e.g. 'timer' */ p = strchr(p, ' '); if (!p) @@ -382,19 +376,21 @@ static void do_proc_irq(void) name = p; strchrnul(name, '\n')[0] = '\0'; /* Save description of the interrupt */ - if (special) + if (nr < 20000) sprintf(irq_desc, " <kernel IPI> : %s", name); else sprintf(irq_desc, " <interrupt> : %s", name); - delta = update_irq(nr, count); + delta = save_irq_count(nr, count); /* Skip per CPU timer interrupts */ - if (percpu_hpet_timer(name)) - delta = 0; - if (nr > 0 && delta > 0) - push_line(irq_desc, delta); - if (!nr) + if (is_hpet_irq(name)) + continue; + + if (nr != 0 && delta != 0) + save_line(irq_desc, delta); + + if (nr == 0) G.interrupt_0 = delta; else G.total_interrupt += delta; @@ -402,7 +398,9 @@ static void do_proc_irq(void) fclose(fp); } -#endif /* ENABLE_FEATURE_POWERTOP_PROCIRQ */ +#else /* !ENABLE_FEATURE_POWERTOP_PROCIRQ */ +# define process_irq_count_deltas() ((void)0) +#endif #ifdef __i386__ /* @@ -546,7 +544,7 @@ static void show_cstates(char cstate_lines[][64]) printf("%s", cstate_lines[i]); } -static void show_timerstats(int nostats) +static void show_timerstats(void) { unsigned lines; @@ -556,19 +554,19 @@ static void show_timerstats(int nostats) /* We don't have whole terminal just for timerstats */ lines -= 12; - if (!nostats) { + if (!G.cant_enable_timer_stats) { int i, n = 0; puts("\nTop causes for wakeups:"); - for (i = 0; i < G.headline; i++) { - if ((G.lines[i].count > 0 || G.lines[i].disk_count > 0) + for (i = 0; i < G.lines_cnt; i++) { + if ((G.lines[i].count > 0 /*|| G.lines[i].disk_count > 0*/) && n++ < lines ) { char c = ' '; - if (G.lines[i].disk_count) - c = 'D'; + /*if (G.lines[i].disk_count) + c = 'D';*/ printf(" %5.1f%% (%5.1f)%c %s\n", - G.lines[i].count * 100.0 / G.nlines, + G.lines[i].count * 100.0 / G.lines_cumulative_count, G.lines[i].count * 1.0 / DEFAULT_SLEEP, c, G.lines[i].string); } @@ -580,6 +578,24 @@ static void show_timerstats(int nostats) } } +// Example display from powertop version 1.11 +// Cn Avg residency P-states (frequencies) +// C0 (cpu running) ( 0.5%) 2.00 Ghz 0.0% +// polling 0.0ms ( 0.0%) 1.67 Ghz 0.0% +// C1 mwait 0.0ms ( 0.0%) 1333 Mhz 0.1% +// C2 mwait 0.1ms ( 0.1%) 1000 Mhz 99.9% +// C3 mwait 12.1ms (99.4%) +// +// Wakeups-from-idle per second : 93.6 interval: 15.0s +// no ACPI power usage estimate available +// +// Top causes for wakeups: +// 32.4% ( 26.7) <interrupt> : extra timer interrupt +// 29.0% ( 23.9) <kernel core> : hrtimer_start_range_ns (tick_sched_timer) +// 9.0% ( 7.5) <kernel core> : hrtimer_start (tick_sched_timer) +// 6.5% ( 5.3) <interrupt> : ata_piix +// 5.0% ( 4.1) inetd : hrtimer_start_range_ns (hrtimer_wakeup) + //usage:#define powertop_trivial_usage //usage: "" //usage:#define powertop_full_usage "\n\n" @@ -588,8 +604,8 @@ static void show_timerstats(int nostats) int powertop_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) { - ullong cur_usage[8]; - ullong cur_duration[8]; + ullong cur_usage[MAX_CSTATE_COUNT]; + ullong cur_duration[MAX_CSTATE_COUNT]; char cstate_lines[12][64]; char buf[128]; #if ENABLE_FEATURE_USE_TERMIOS @@ -602,7 +618,7 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) INIT_G(); -#if ENABLE_FEATURE_POWERTOP_PROCIRQ +#if ENABLE_FEATURE_POWERTOP_PROCIRQ && BLOATY_HPET_IRQ_NUM_DETECTION G.percpu_hpet_start = INT_MAX; G.percpu_hpet_end = INT_MIN; #endif @@ -611,11 +627,6 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) if (geteuid() != 0) bb_error_msg("run as root to collect enough information"); -#if ENABLE_FEATURE_USE_TERMIOS - /* So we don't forget to reset term settings */ - atexit(reset_term); -#endif - /* Get number of CPUs */ G.total_cpus = get_cpu_count(); @@ -624,22 +635,19 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) #if ENABLE_FEATURE_USE_TERMIOS tcgetattr(0, (void *)&G.init_settings); memcpy(&new_settings, &G.init_settings, sizeof(new_settings)); - /* Turn on unbuffered input, turn off echoing */ new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL); - + /* So we don't forget to reset term settings */ + atexit(reset_term); bb_signals(BB_FATAL_SIGS, sig_handler); tcsetattr_stdin_TCSANOW(&new_settings); #endif -#if ENABLE_FEATURE_POWERTOP_PROCIRQ /* Collect initial data */ - do_proc_irq(); - do_proc_irq(); -#endif + process_irq_count_deltas(); /* Read initial usage and duration */ - read_data(&G.start_usage[0], &G.start_duration[0]); + read_cstate_counts(G.start_usage, G.start_duration); /* Copy them to "last" */ memcpy(G.last_usage, G.start_usage, sizeof(G.last_usage)); @@ -648,20 +656,16 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) /* Display C-states */ print_intel_cstates(); - if (stop_timer()) - G.nostats = 1; + G.cant_enable_timer_stats |= stop_timer(); /* 1 on error */ /* The main loop */ for (;;) { - double maxsleep = 0.0; + /*double maxsleep = 0.0;*/ ullong totalticks, totalevents; int i; FILE *fp; - double newticks; - - if (start_timer()) - G.nostats = 1; + G.cant_enable_timer_stats |= start_timer(); /* 1 on error */ #if !ENABLE_FEATURE_USE_TERMIOS sleep(DEFAULT_SLEEP); #else @@ -675,27 +679,22 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) break; } #endif - - if (stop_timer()) - G.nostats = 1; + G.cant_enable_timer_stats |= stop_timer(); /* 1 on error */ clear_lines(); -#if ENABLE_FEATURE_POWERTOP_PROCIRQ - do_proc_irq(); -#endif + process_irq_count_deltas(); /* Clear the stats */ memset(cur_duration, 0, sizeof(cur_duration)); memset(cur_usage, 0, sizeof(cur_usage)); /* Read them */ - read_data(&cur_usage[0], &cur_duration[0]); - - totalticks = totalevents = 0; + read_cstate_counts(cur_usage, cur_duration); /* Count totalticks and totalevents */ - for (i = 0; i < 8; i++) { - if (cur_usage[i]) { + totalticks = totalevents = 0; + for (i = 0; i < MAX_CSTATE_COUNT; i++) { + if (cur_usage[i] != 0) { totalticks += cur_duration[i] - G.last_duration[i]; totalevents += cur_usage[i] - G.last_usage[i]; } @@ -714,6 +713,7 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) } else { double slept; double percentage; + double newticks; newticks = G.total_cpus * DEFAULT_SLEEP * FREQ_ACPI_1000 - totalticks; @@ -727,8 +727,8 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) percentage); /* Compute values for individual C-states */ - for (i = 0; i < 8; i++) { - if (cur_usage[i]) { + for (i = 0; i < MAX_CSTATE_COUNT; i++) { + if (cur_usage[i] != 0) { slept = (cur_duration[i] - G.last_duration[i]) / (cur_usage[i] - G.last_usage[i] + 0.1) / FREQ_ACPI; percentage = (cur_duration[i] - G.last_duration[i]) * 100 @@ -738,8 +738,8 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) sprintf(G.cstate_names[i], "C%u", i + 1); sprintf(cstate_lines[i + 2], "%s\t%5.1fms (%4.1f%%)\n", G.cstate_names[i], slept, percentage); - if (maxsleep < slept) - maxsleep = slept; + /*if (maxsleep < slept) + maxsleep = slept;*/ } } } @@ -752,16 +752,34 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) totalticks = 0; fp = NULL; - if (!G.nostats) + if (!G.cant_enable_timer_stats) fp = fopen_for_read("/proc/timer_stats"); if (fp) { +// Examlpe file contents: +// Timer Stats Version: v0.2 +// Sample period: 1.329 s +// 76, 0 swapper hrtimer_start_range_ns (tick_sched_timer) +// 88, 0 swapper hrtimer_start_range_ns (tick_sched_timer) +// 24, 3787 firefox hrtimer_start_range_ns (hrtimer_wakeup) +// 46D, 1136 kondemand/1 do_dbs_timer (delayed_work_timer_fn) +// ... +// 1, 1656 Xorg hrtimer_start_range_ns (hrtimer_wakeup) +// 1, 2159 udisks-daemon hrtimer_start_range_ns (hrtimer_wakeup) +// 331 total events, 249.059 events/sec while (fgets(buf, sizeof(buf), fp)) { const char *count, *process, *func; + char *p; char line[512]; int cnt = 0; - bool defferable = false; - char *p; - int j = 0; +// TODO: optimize + if (strstr(buf, "total events")) + break; + count = skip_whitespace(buf); + p = strchr(count, ','); + if (!p) + continue; + *p++ = '\0'; + p = skip_whitespace(p); /* points to pid */ /* Find char ' ', then eat remaining spaces */ #define ADVANCE(p) do { \ @@ -772,26 +790,7 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) (p)++; \ (p) = skip_whitespace(p); \ } while (0) - - if (strstr(buf, "total events")) - break; - - while (isspace(buf[j])) - j++; - - count = &buf[j]; - p = (char *)count; - - /* Skip PID */ - p = strchr(p, ','); - if (!p) - continue; - *p = '\0'; - p++; - - p = skip_whitespace(p); - - /* Get process */ + /* Get process name */ ADVANCE(p); process = p; @@ -813,8 +812,6 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) if (strcmp(process, "swapper") == 0) process = "[kernel core]"; - p = strchr(p, '\n'); - if (strncmp(func, "tick_nohz_", 10) == 0) continue; if (strncmp(func, "tick_setup_sched_timer", 20) == 0) @@ -822,22 +819,20 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) if (strcmp(process, "powertop") == 0) continue; - if (p) - *p = '\0'; + strchrnul(p, '\n')[0] = '\0'; cnt = bb_strtoull(count, &p, 10); - while (*p != 0) { + while (*p != '\0') { if (*p++ == 'D') - defferable = true; + goto skip; } - if (defferable) - continue; if (strchr(process, '[')) sprintf(line, "%s %s", process, func); else sprintf(line, "%s", process); - push_line(line, cnt); + save_line(line, cnt); + skip: ; } fclose(fp); } @@ -853,19 +848,17 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) totalevents += G.interrupt_0 - n; } if (n > 0 && n < G.interrupt_0) - push_line("[extra timer interrupt]", G.interrupt_0 - n); + save_line("[extra timer interrupt]", G.interrupt_0 - n); } #endif - if (totalevents) + if (totalevents != 0) printf("\n\033[1mWakeups-from-idle per second : %4.1f\tinterval:" "%ds\n\033[0m", (double)totalevents / DEFAULT_SLEEP / G.total_cpus, DEFAULT_SLEEP); - count_lines(); - do_sort(); - - show_timerstats(G.nostats); - + update_lines_cumulative_count(); + sort_lines(); + show_timerstats(); fflush(stdout); /* Clear the stats */ @@ -873,7 +866,7 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) memset(cur_usage, 0, sizeof(cur_usage)); /* Get new values */ - read_data(&cur_usage[0], &cur_duration[0]); + read_cstate_counts(cur_usage, cur_duration); /* Save them */ memcpy(G.last_usage, cur_usage, sizeof(G.last_usage)); |