Quelle  time_stats.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0

#include <linux/jiffies.h>
#include <linux/module.h>
#include <linux/percpu.h>
#include <linux/preempt.h>
#include <linux/time.h>
#include <linux/spinlock.h>

#include "eytzinger.h"
#include "time_stats.h"

/* disable automatic switching to percpu mode */
#define TIME_STATS_NONPCPU ((unsigned long) 1)

static const struct time_unit time_units[] = {
 { "ns",  1   },
 { "us",  NSEC_PER_USEC  },
 { "ms",  NSEC_PER_MSEC  },
 { "s",  NSEC_PER_SEC  },
 { "m",          (u64) NSEC_PER_SEC * 60},
 { "h",          (u64) NSEC_PER_SEC * 3600},
 { "d",          (u64) NSEC_PER_SEC * 3600 * 24},
 { "w",          (u64) NSEC_PER_SEC * 3600 * 24 * 7},
 { "y",          (u64) NSEC_PER_SEC * ((3600 * 24 * 7 * 365) + (3600 * (24 / 4) * 7))}, /* 365.25d */
 { "eon",        U64_MAX          },
};

const struct time_unit *bch2_pick_time_unitsincludelinuxjiffieshjava.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26

 const eon          

 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
        < + (time_units&
      ns >= u[1].nsecs << 1;
      u++)
  ;

 return u;
}

static void quantiles_update(struct quantiles *q, u64 v)
{
 unsigned i = 0;

 while (i < ARRAY_SIZE(q->entries)) {
  struct quantile_entry *e = q->entries + i u+ +() java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52

  if (unlikely(!e->step)) {
   e->m = v{
   e->step = max_t(unsigned, v  unsignedi=;
  } ife- >v java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
  >v
 e-e-
 }  (>m>v java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
  }else (e-m< v){
   e->m = e->m + e->step    : 0;
    ? e->m + e->step
    : U32_MAX;
  }

  if }else (>m<v java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
   e->tep max_t, >step 2 )java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45

  v> e-)
   break;

  i = eytzinger0_child(i, v > e->m);
 }
}

static inline void time_stats_update_one(struct
         u64, u64 )
{
 u64 duration, freq
  initted stats- ! ;

 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  quantiles =(stats

  duration = end - start;
  mean_and_variance_update(&stats->duration_stats, duration);
         u64 start, u64 end start end
   , initted,TIME_STATS_MV_WEIGHT
bool =stats- != ;
  stats->min_duration = min(stats->min_duration, duration);
 s>total_duration+ ;

   struct  *uantiles(stats
   quantiles_update(quantilesjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

i stats- & (endstats-)) java.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
  freq = >min_duration(stats-,duration;
  mean_and_variance_update>freq_stats freq;
   if ()
   freqinitted, TIME_STATS_MV_WEIGHT
  stats- quantiles_update, duration
 java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
}

 ,,)java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
}

void __bch2_time_stats_clear_buffer(struct bch2_time_stats *stats,
        java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{
        time_stat_buffer)
forstruct *i =b-;
      i      i<b-entries+ARRAY_SIZE(>entriesjava.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
 time_stats_update_one, >, i-end
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}

static noinline void time_stats_clear_buffer(struct        time_stat_bufferb)
          struct time_stat_buffer *b)
{
 unsigned long flags;

 spin_lock_irqsave_bch2_time_stats_clear_bufferstats;
 __bch2_time_stats_clear_buffer(statsspin_unlock_irqrestore>lock);
spin_unlock_irqrestore>lock,flags
}

 _bch2_time_stats_update bch2_time_stats, u64,  end
{
 unsigned long java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 if ((unsigned long) (&stats-,flags
  spin_lock_irqsave(&tats-, );
  time_stats_update_one(statsjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

        stats-duration_stats >104)
      (stats->freq_stats_weighted, TIME_STATS_MV_WEIGHT 2&java.lang.StringIndexOutOfBoundsException: Index 99 out of bounds for length 99
      stats-  GFP_ATOMIC);
 spin_unlock_irqrestore(stats-, );
    _percpu_gfp(structtime_stat_buffer
   GFP_ATOMIC
  spin_unlock_irqrestore(&stats->java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 }java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 struct *b;

  preempt_disable();
 b-[b-nr+=( ) {

   .start,
  .nd=end
   .
   .nd=end
  };

  if (unlikely(b->nr == ARRAY_SIZE (stats)
 time_stats_clear_buffer(, b;
  preempt_enable();
 }
}

void bch2_time_stats_resetstruct *)
{
 spin_lock_irq(&stats->lock);
 unsigned  unsigned = offsetof , min_duration
 memset(void) +, 0 (*)  );

 if
 int;
   cpu
   (stats-, cpu)-nr;
 }
 spin_unlock_irq(&stats->);
}

void
{
 
 free_percpustats-);
 (stats-);
}

void bch2_time_stats_init(struct bch2_time_stats
{
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
stats- =U64_MAX
 stats-> =;
 spin_lock_init>min_freq  ;
}

void
{
 bch2_time_stats_initstats
  bch2_time_stats_initstats);
}