courgette/memory_monitor.cc

   1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <stdio.h>
   6 #include <map>
   7
   8 #include "base/logging.h"
   9 #include "base/strings/string_util.h"
  10
  11 bool inH = true;
  12 struct H {
  13   H() { inH = false;  tick_ = 0; bw_ = 0; d_bw_ = d_tick_ = 0; m_bw_ = 0; mem_ = high_ = 0;}
  14   ~H() {
  15     inH = true;
  16     int i = 0;
  17     for (M::iterator p = m_.begin(); p != m_.end(); ++p, ++i) {
  18       size_t s = p->first;
  19       LOG(INFO) << base::StringPrintf("%3d %8u: %8u %8u %8u %8u", i, s,
  20              m_[s], c_[s], h_[s], h_[s] * s);
  21     }
  22     LOG(INFO) << "Peak " << fmt(high_);
  23   }
  24
  25   std::string fmt(size_t s) {
  26     if (s > 1000000000) return base::StringPrintf("%.3gG", s/(1000000000.0));
  27     if (s > 1000000) return base::StringPrintf("%.3gM", s/(1000000.));
  28     if (s > 9999) return base::StringPrintf("%.3gk", s/(1000.));
  29     return base::IntToString((int)s);
  30   }
  31
  32   void tick(size_t w, char sign) {
  33     d_tick_ += 1;
  34     d_bw_ += w;
  35     const size_t T = 4*4*1024;
  36     const size_t M = 4*1024*1024;
  37     bool print = false;
  38     if (d_tick_ >= T) {
  39       tick_ += (d_tick_/T)*T;
  40       d_tick_ %= T;
  41       print = true;
  42     }
  43     if (d_bw_ >= M) {
  44       bw_ += (d_bw_/M) * M;
  45       d_bw_ %= M;
  46       print = true;
  47     }
  48     if (!print) return;
  49     std::string o;
  50     base::StringAppendF(&o, "%u:", tick_ + d_tick_);
  51     base::StringAppendF(&o, " (%c%s)", sign, fmt(w).c_str());
  52     size_t sum = 0;
  53     for (M::iterator p = c_.begin(); p != c_.end(); ++p) {
  54       size_t s = p->first;
  55       size_t n = p->second;
  56       if (n) {
  57         if (s*n >= 64*1024)
  58           if (n == 1)
  59             base::StringAppendF(&o, "  %s", fmt(s).c_str());
  60           else
  61             base::StringAppendF(&o, "  %s*%u", fmt(s).c_str(), n);
  62         sum += s*n;
  63         }
  64     }
  65     base::StringAppendF(&o, "  = %s", fmt(sum).c_str());
  66     LOG(INFO) << o;
  67     //printf("%s\n", o.c_str());
  68     if (sum > 200*1024*1024) {
  69       // __asm int 3;
  70       m_bw_ = sum;
  71     }
  72   }
  73   void add(size_t s, void *p) {
  74     if (!inH) {
  75       inH = true;
  76       mem_ += s; if (mem_ > high_) high_ = mem_;
  77       c_[s] += 1;
  78       m_[s] += 1;
  79       if (c_[s] > h_[s]) h_[s] = c_[s];
  80       allocs_[p] = s;
  81       inH = false;
  82       tick(s, '+');
  83     }
  84   }
  85
  86   void sub(void *p) {
  87     if (!inH) {
  88       inH = true;
  89       size_t s = allocs_[p];
  90       if (s) {
  91         mem_ -= s;
  92         c_[s] -= 1;
  93         allocs_[p] = 0;
  94         tick(s, '-');
  95       }
  96       inH = false;
  97     }
  98   }
  99
 100   typedef std::map<size_t, size_t> M;
 101   M m_;
 102   M c_;
 103   M h_;
 104
 105   size_t bw_;
 106   size_t d_bw_;
 107   size_t tick_;
 108   size_t d_tick_;
 109   size_t m_bw_;
 110   size_t mem_;
 111   size_t high_;
 112
 113   std::map<void*, size_t> allocs_;
 114 } _H;
 115
 116 void* operator new(size_t s) {
 117   //printf("%u\n", s);
 118   void *p = malloc(s);
 119   _H.add(s, p);
 120   return p;
 121 }
 122
 123 void operator delete(void *p) {
 124   _H.sub(p);
 125   free(p);
 126 }