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| author | Zhengyin Qian <qianzy@google.com> | 2016-04-26 11:57:16 -0700 |
|---|---|---|
| committer | Zhengyin Qian <qianzy@google.com> | 2016-05-12 22:25:58 +0000 |
| commit | faf487dfa9bf5b22fe6dd7e8696a26a2081361eb (patch) | |
| tree | ab499adc9121268daace8d96b0b13bbda3516483 /ANRdaemon | |
| parent | 2fb9d35f0d49c2d1e38e4584f48ab06b642ead5c (diff) | |
| download | extras-faf487dfa9bf5b22fe6dd7e8696a26a2081361eb.tar.gz | |
ANRdaemon: increase the CPU threshold resolution to 0.01%
Change-Id: If2a305bd14e8bd7c22115cbca668bd7777d0e7d2
Diffstat (limited to 'ANRdaemon')
| -rw-r--r-- | ANRdaemon/ANRdaemon.cpp | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/ANRdaemon/ANRdaemon.cpp b/ANRdaemon/ANRdaemon.cpp index 5a4f8bf9..9b36b2df 100644 --- a/ANRdaemon/ANRdaemon.cpp +++ b/ANRdaemon/ANRdaemon.cpp @@ -74,8 +74,11 @@ typedef struct cpu_stat { unsigned long total; } cpu_stat_t; -/* Make the logging on/off threshold equal to 95% cpu usage. */ -static int idle_threshold = 5; +/* + * Logging on/off threshold. + * Uint: 0.01%; default to 99.90% cpu. + */ +static int idle_threshold = 10; static bool quit = false; static bool suspend= false; @@ -151,18 +154,18 @@ static void get_cpu_stat(cpu_stat_t *cpu) { /* * Calculate cpu usage in the past interval. - * If tracing is on, increase the idle threshold by 1% so that we do not + * If tracing is on, increase the idle threshold by 1.00% so that we do not * turn on and off tracing frequently whe the cpu load is right close to * threshold. */ static bool is_heavy_load(void) { unsigned long diff_idle, diff_total; - int threshold = idle_threshold + (tracing?1:0); + int threshold = idle_threshold + (tracing?100:0); get_cpu_stat(&new_cpu); diff_idle = new_cpu.itime - old_cpu.itime; diff_total = new_cpu.total - old_cpu.total; old_cpu = new_cpu; - return (diff_idle * 100 < diff_total * threshold); + return (diff_idle * 10000 < diff_total * threshold); } /* @@ -494,7 +497,7 @@ static void show_help(void) { " -a appname enable app-level tracing for a comma " "separated list of cmdlines\n" " -t N cpu threshold for logging to start " - "(min = 50, max = 100, default = 95)\n" + "(uint = 0.01%%, min = 5000, max = 9999, default = 9990)\n" " -s N use a trace buffer size of N KB " "default to 16KB\n" " -h show helps\n"); @@ -535,11 +538,11 @@ static int get_options(int argc, char *argv[]) { break; case 't': threshold = atoi(optarg); - if (threshold > 100 || threshold < 50) { - fprintf(stderr, "logging threshold should be 50-100\n"); + if (threshold > 9999 || threshold < 5000) { + fprintf(stderr, "logging threshold should be 5000-9999\n"); return 1; } - idle_threshold = 100 - threshold; + idle_threshold = 10000 - threshold; break; case 'h': show_help(); |