LCOV - code coverage report
Current view: top level - kernel/time - timekeeping_debug.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 19 0.0 %
Date: 2014-02-18 Functions: 0 4 0.0 %
Branches: 0 8 0.0 %

           Branch data     Line data    Source code
       1                 :            : /*
       2                 :            :  * debugfs file to track time spent in suspend
       3                 :            :  *
       4                 :            :  * Copyright (c) 2011, Google, Inc.
       5                 :            :  *
       6                 :            :  * This program is free software; you can redistribute it and/or modify
       7                 :            :  * it under the terms of the GNU General Public License as published by
       8                 :            :  * the Free Software Foundation; either version 2 of the License, or
       9                 :            :  * (at your option) any later version.
      10                 :            :  *
      11                 :            :  * This program is distributed in the hope that it will be useful, but WITHOUT
      12                 :            :  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
      13                 :            :  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
      14                 :            :  * more details.
      15                 :            :  */
      16                 :            : 
      17                 :            : #include <linux/debugfs.h>
      18                 :            : #include <linux/err.h>
      19                 :            : #include <linux/init.h>
      20                 :            : #include <linux/kernel.h>
      21                 :            : #include <linux/seq_file.h>
      22                 :            : #include <linux/time.h>
      23                 :            : 
      24                 :            : static unsigned int sleep_time_bin[32] = {0};
      25                 :            : 
      26                 :          0 : static int tk_debug_show_sleep_time(struct seq_file *s, void *data)
      27                 :            : {
      28                 :            :         unsigned int bin;
      29                 :          0 :         seq_puts(s, "      time (secs)        count\n");
      30                 :          0 :         seq_puts(s, "------------------------------\n");
      31         [ #  # ]:          0 :         for (bin = 0; bin < 32; bin++) {
      32         [ #  # ]:          0 :                 if (sleep_time_bin[bin] == 0)
      33                 :          0 :                         continue;
      34         [ #  # ]:          0 :                 seq_printf(s, "%10u - %-10u %4u\n",
      35                 :          0 :                         bin ? 1 << (bin - 1) : 0, 1 << bin,
      36                 :            :                                 sleep_time_bin[bin]);
      37                 :            :         }
      38                 :          0 :         return 0;
      39                 :            : }
      40                 :            : 
      41                 :          0 : static int tk_debug_sleep_time_open(struct inode *inode, struct file *file)
      42                 :            : {
      43                 :          0 :         return single_open(file, tk_debug_show_sleep_time, NULL);
      44                 :            : }
      45                 :            : 
      46                 :            : static const struct file_operations tk_debug_sleep_time_fops = {
      47                 :            :         .open           = tk_debug_sleep_time_open,
      48                 :            :         .read           = seq_read,
      49                 :            :         .llseek         = seq_lseek,
      50                 :            :         .release        = single_release,
      51                 :            : };
      52                 :            : 
      53                 :          0 : static int __init tk_debug_sleep_time_init(void)
      54                 :            : {
      55                 :            :         struct dentry *d;
      56                 :            : 
      57                 :          0 :         d = debugfs_create_file("sleep_time", 0444, NULL, NULL,
      58                 :            :                 &tk_debug_sleep_time_fops);
      59         [ #  # ]:          0 :         if (!d) {
      60                 :          0 :                 pr_err("Failed to create sleep_time debug file\n");
      61                 :          0 :                 return -ENOMEM;
      62                 :            :         }
      63                 :            : 
      64                 :            :         return 0;
      65                 :            : }
      66                 :            : late_initcall(tk_debug_sleep_time_init);
      67                 :            : 
      68                 :          0 : void tk_debug_account_sleep_time(struct timespec *t)
      69                 :            : {
      70                 :          0 :         sleep_time_bin[fls(t->tv_sec)]++;
      71                 :          0 : }
      72                 :            : 

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