diff options
| -rw-r--r-- | procps/powertop.c | 330 |
1 files changed, 169 insertions, 161 deletions
diff --git a/procps/powertop.c b/procps/powertop.c index 4b41054..5792048 100644 --- a/procps/powertop.c +++ b/procps/powertop.c @@ -19,7 +19,7 @@ //config: help //config: Analyze power consumption on Intel-based laptops -// XXX This should de configurable +// XXX This should be configurable #define ENABLE_FEATURE_POWERTOP_PROCIRQ 1 #include "libbb.h" @@ -39,7 +39,7 @@ /* 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 @@ -62,12 +62,11 @@ struct irqdata { #endif struct globals { + struct line *lines; /* the most often used member */ 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 # if BLOATY_HPET_IRQ_NUM_DETECTION @@ -120,15 +119,16 @@ static int write_str_to_file(const char *fname, const char *str) #define start_timer() write_str_to_file("/proc/timer_stats", "1\n") #define stop_timer() write_str_to_file("/proc/timer_stats", "0\n") -static void NOINLINE clear_lines(void) +static NOINLINE void clear_lines(void) { int i; - for (i = 0; i < G.lines_cnt; i++) - free(G.lines[i].string); - free(G.lines); - G.lines_cnt = 0; - G.linesize = 0; - G.lines = NULL; + if (G.lines) { + for (i = 0; i < G.lines_cnt; i++) + free(G.lines[i].string); + free(G.lines); + G.lines_cnt = 0; + G.lines = NULL; + } } static void update_lines_cumulative_count(void) @@ -220,7 +220,7 @@ static void save_line(const char *string, int count) } /* Add new line */ - G.lines = xrealloc_vector(G.lines, 1, G.lines_cnt); + G.lines = xrealloc_vector(G.lines, 4, 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;*/ @@ -298,7 +298,7 @@ static int save_irq_count(int irq, ullong count) } /* Read /proc/interrupts, save IRQ counts and IRQ description */ -static void process_irq_count_deltas(void) +static void process_irq_counts(void) { FILE *fp; char buf[128]; @@ -399,9 +399,121 @@ static void process_irq_count_deltas(void) fclose(fp); } #else /* !ENABLE_FEATURE_POWERTOP_PROCIRQ */ -# define process_irq_count_deltas() ((void)0) +# define process_irq_counts() ((void)0) #endif +static NOINLINE int process_timer_stats(void) +{ + char buf[128]; + char line[15 + 3 + 128]; + int n; + ullong totalticks; + FILE *fp; + + buf[0] = '\0'; + totalticks = 0; + + fp = NULL; + if (!G.cant_enable_timer_stats) + fp = fopen_for_read("/proc/timer_stats"); + if (fp) { +// Example 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; + int cnt; + + count = skip_whitespace(buf); + p = strchr(count, ','); + if (!p) + continue; + *p++ = '\0'; + if (strcmp(strchrnul(count, ' '), " total events") == 0) + break; + p = skip_whitespace(p); /* points to pid */ + +/* Find char ' ', then eat remaining spaces */ +#define ADVANCE(p) do { \ + (p) = strchr((p), ' '); \ + if (!(p)) \ + continue; \ + *(p) = '\0'; \ + (p)++; \ + (p) = skip_whitespace(p); \ +} while (0) + /* Get process name */ + ADVANCE(p); + process = p; + /* Get function */ + ADVANCE(p); + func = p; +#undef ADVANCE + //if (strcmp(process, "swapper") == 0 + // && strcmp(func, "hrtimer_start_range_ns (tick_sched_timer)\n") == 0 + //) { + // process = "[kernel scheduler]"; + // func = "Load balancing tick"; + //} + + if (strncmp(func, "tick_nohz_", 10) == 0) + continue; + if (strncmp(func, "tick_setup_sched_timer", 20) == 0) + continue; + //if (strcmp(process, "powertop") == 0) + // continue; + + if (strcmp(process, "insmod") == 0) + process = "[kernel module]"; + if (strcmp(process, "modprobe") == 0) + process = "[kernel module]"; + if (strcmp(process, "swapper") == 0) + process = "<kernel core>"; + + strchrnul(p, '\n')[0] = '\0'; + + { + char *tmp; + cnt = bb_strtoull(count, &tmp, 10); + p = tmp; + } + while (*p != '\0') { + if (*p++ == 'D') /* deferred */ + goto skip; + } + + //if (strchr(process, '[')) + sprintf(line, "%15.15s : %s", process, func); + //else + // sprintf(line, "%s", process); + save_line(line, cnt); + skip: ; + } + fclose(fp); + } + + n = 0; +#if ENABLE_FEATURE_POWERTOP_PROCIRQ + if (strstr(buf, "total events")) { + n = bb_strtoull(buf, NULL, 10) / G.total_cpus; + if (n > 0 && n < G.interrupt_0) { + sprintf(line, " <interrupt> : %s", "extra timer interrupt"); + save_line(line, G.interrupt_0 - n); + } + } +#endif + return n; +} + #ifdef __i386__ /* * Get information about CPU using CPUID opcode. @@ -428,7 +540,7 @@ static void cpuid(unsigned int *eax, unsigned int *ebx, unsigned int *ecx, } #endif -static void NOINLINE print_intel_cstates(void) +static NOINLINE void print_intel_cstates(void) { #ifdef __i386__ int bios_table[8] = { 0 }; @@ -462,7 +574,7 @@ static void NOINLINE print_intel_cstates(void) /* * Every C-state has its own stateN directory, that - * contains a `time' and a `usage' file. + * contains a 'time' and a 'usage' file. */ while ((d = readdir(dir)) != NULL) { FILE *fp; @@ -525,25 +637,6 @@ static void NOINLINE print_intel_cstates(void) #endif } -static void print_header(void) -{ - printf( - /* Clear the screen */ - "\033[H\033[J" - /* Print the header */ - "\033[7m%.*s\033[0m", 79, "PowerTOP (C) 2007 Intel Corporation\n" - ); -} - -static void show_cstates(char cstate_lines[][64]) -{ - int i; - - for (i = 0; i < 10; i++) - if ((cstate_lines[i][0])) - printf("%s", cstate_lines[i]); -} - static void show_timerstats(void) { unsigned lines; @@ -556,19 +649,26 @@ static void show_timerstats(void) if (!G.cant_enable_timer_stats) { int i, n = 0; + char strbuf6[6]; + strbuf6[5] = '\0'; puts("\nTop causes for wakeups:"); 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) + /* NB: upstream powertop prints "(wakeups/sec)", + * we print just "(wakeup counts)". + */ + /*char c = ' '; + if (G.lines[i].disk_count) c = 'D';*/ - printf(" %5.1f%% (%5.1f)%c %s\n", - G.lines[i].count * 100.0 / G.lines_cumulative_count, - G.lines[i].count * 1.0 / DEFAULT_SLEEP, c, - G.lines[i].string); + smart_ulltoa5(G.lines[i].count, strbuf6, " KMGTPEZY"); + printf(/*" %5.1f%% (%s)%c %s\n"*/ + " %5.1f%% (%s) %s\n", + G.lines[i].count * 100.0 / G.lines_cumulative_count, + strbuf6, /*c,*/ + G.lines[i].string); } } } else { @@ -606,8 +706,7 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) { ullong cur_usage[MAX_CSTATE_COUNT]; ullong cur_duration[MAX_CSTATE_COUNT]; - char cstate_lines[12][64]; - char buf[128]; + char cstate_lines[MAX_CSTATE_COUNT + 2][64]; #if ENABLE_FEATURE_USE_TERMIOS struct termios new_settings; struct pollfd pfd[1]; @@ -644,7 +743,7 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) #endif /* Collect initial data */ - process_irq_count_deltas(); + process_irq_counts(); /* Read initial usage and duration */ read_cstate_counts(G.start_usage, G.start_duration); @@ -660,10 +759,9 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) /* The main loop */ for (;;) { - /*double maxsleep = 0.0;*/ + //double maxsleep = 0.0; ullong totalticks, totalevents; int i; - FILE *fp; G.cant_enable_timer_stats |= start_timer(); /* 1 on error */ #if !ENABLE_FEATURE_USE_TERMIOS @@ -682,7 +780,7 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) G.cant_enable_timer_stats |= stop_timer(); /* 1 on error */ clear_lines(); - process_irq_count_deltas(); + process_irq_counts(); /* Clear the stats */ memset(cur_duration, 0, sizeof(cur_duration)); @@ -700,8 +798,8 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) } } - /* Show title bar */ - print_header(); + /* Clear the screen */ + printf("\033[H\033[J"); /* Clear C-state lines */ memset(&cstate_lines, 0, sizeof(cstate_lines)); @@ -711,7 +809,6 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) sprintf(cstate_lines[5], "< Detailed C-state information is not " "available.>\n"); } else { - double slept; double percentage; double newticks; @@ -721,7 +818,7 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) if (newticks < 0) newticks = 0; - sprintf(cstate_lines[0], "Cn\t Avg residency\n"); + sprintf(cstate_lines[0], "Cn\t\t Avg residency\n"); percentage = newticks * 100.0 / (G.total_cpus * DEFAULT_SLEEP * FREQ_ACPI_1000); sprintf(cstate_lines[1], "C0 (cpu running) (%4.1f%%)\n", percentage); @@ -729,6 +826,7 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) /* Compute values for individual C-states */ for (i = 0; i < MAX_CSTATE_COUNT; i++) { if (cur_usage[i] != 0) { + double slept; 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 @@ -736,125 +834,35 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) if (!G.cstate_names[i][0]) sprintf(G.cstate_names[i], "C%u", i + 1); - sprintf(cstate_lines[i + 2], "%s\t%5.1fms (%4.1f%%)\n", + sprintf(cstate_lines[i + 2], "%s\t\t%5.1fms (%4.1f%%)\n", G.cstate_names[i], slept, percentage); - /*if (maxsleep < slept) - maxsleep = slept;*/ + //if (maxsleep < slept) + // maxsleep = slept; } } } - /* Display C-states */ - show_cstates(cstate_lines); - - /* Do timer_stats info */ - buf[0] = '\0'; - totalticks = 0; - - fp = NULL; - 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; -// 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 { \ - (p) = strchr((p), ' '); \ - if (!(p)) \ - continue; \ - *(p) = '\0'; \ - (p)++; \ - (p) = skip_whitespace(p); \ -} while (0) - /* Get process name */ - ADVANCE(p); - process = p; - - /* Get function */ - ADVANCE(p); - func = p; - - if (strcmp(process, "swapper") == 0 - && strcmp(func, "hrtimer_start_range_ns (tick_sched_timer)\n") == 0 - ) { - process = "[kernel scheduler]"; - func = "Load balancing tick"; - } - - if (strcmp(process, "insmod") == 0) - process = "[kernel module]"; - if (strcmp(process, "modprobe") == 0) - process = "[kernel module]"; - if (strcmp(process, "swapper") == 0) - process = "[kernel core]"; - - if (strncmp(func, "tick_nohz_", 10) == 0) - continue; - if (strncmp(func, "tick_setup_sched_timer", 20) == 0) - continue; - if (strcmp(process, "powertop") == 0) - continue; - - strchrnul(p, '\n')[0] = '\0'; - - cnt = bb_strtoull(count, &p, 10); - while (*p != '\0') { - if (*p++ == 'D') - goto skip; - } - - if (strchr(process, '[')) - sprintf(line, "%s %s", process, func); - else - sprintf(line, "%s", process); - save_line(line, cnt); - skip: ; - } - fclose(fp); - } + for (i = 0; i < MAX_CSTATE_COUNT + 2; i++) + if (cstate_lines[i][0]) + printf("%s", cstate_lines[i]); + i = process_timer_stats(); #if ENABLE_FEATURE_POWERTOP_PROCIRQ - if (strstr(buf, "total events")) { - int n = bb_strtoull(buf, NULL, 10) / G.total_cpus; - - if (totalevents == 0) { - /* No C-state info available, use timerstats */ - totalevents = n * G.total_cpus + G.total_interrupt; - if (n < 0) - totalevents += G.interrupt_0 - n; - } - if (n > 0 && n < G.interrupt_0) - save_line("[extra timer interrupt]", G.interrupt_0 - n); + if (totalevents == 0) { + /* No C-state info available, use timerstats */ + totalevents = i * G.total_cpus + G.total_interrupt; + if (i < 0) + totalevents += G.interrupt_0 - i; } #endif - 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); + /* Upstream powertop prints wakeups per sec per CPU, + * we print just raw wakeup counts. + */ +//TODO: show real seconds (think about manual refresh) + printf("\nWakeups-from-idle in %u seconds: %llu\n", + DEFAULT_SLEEP, + totalevents + ); update_lines_cumulative_count(); sort_lines(); |