gem5  v20.1.0.0
simple_pool_manager.cc
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33 
35 
36 #include "base/logging.hh"
37 
39 SimplePoolManagerParams::create()
40 {
41  return new SimplePoolManager(this);
42 }
43 
44 // return the min number of elements that the manager can reserve given
45 // a request for "size" elements
46 uint32_t
48 {
49  fatal_if(size <= 0 || size > poolSize(), "Illegal VGPR region size=%d\n",
50  size);
51 
52  return size % minAllocation() > 0 ?
53  (minAllocation() - (size % minAllocation())) + size : size;
54 }
55 
56 std::string
58 {
59  std::string _cout;
60  if (_reservedGroups == 0)
61  _cout = "VRF is empty\n";
62  else if (_reservedGroups > 0) {
63  uint32_t reservedEntries = _reservedGroups * _regionSize;
64  _cout = "VRF reserves " + std::to_string(reservedEntries) + " VGPRs\n";
65  }
66 
67  return _cout;
68 }
69 
70 bool
71 SimplePoolManager::canAllocate(uint32_t numRegions, uint32_t size)
72 {
73  return _reservedGroups == 0;
74 }
75 
76 void
77 SimplePoolManager::freeRegion(uint32_t firstIdx, uint32_t lastIdx)
78 {
79  assert(_reservedGroups > 0);
81 
82  if (!_reservedGroups)
83  _nxtFreeIdx = 0;
84 }
85 
86 uint32_t
88  uint32_t *reservedPoolSize)
89 {
90  uint32_t actualSize = minAllocatedElements(size);
91  uint32_t startIdx = _nxtFreeIdx;
92  _nxtFreeIdx += actualSize;
93  _regionSize = actualSize;
94  assert(_nxtFreeIdx < poolSize());
95  *reservedPoolSize = actualSize;
97 
98  return startIdx;
99 }
100 
101 uint32_t
103 {
104  bool wrapAround = (region.first > region.second);
105  if (!wrapAround) {
106  return region.second - region.first + 1;
107  } else {
108  return region.second + poolSize() - region.first + 1;
109  }
110 }
SimplePoolManager::minAllocatedElements
uint32_t minAllocatedElements(uint32_t size)
Definition: simple_pool_manager.cc:47
simple_pool_manager.hh
sc_dt::to_string
const std::string to_string(sc_enc enc)
Definition: sc_fxdefs.cc:91
SimplePoolManager::printRegion
std::string printRegion()
Definition: simple_pool_manager.cc:57
SimplePoolManager
Definition: simple_pool_manager.hh:45
SimplePoolManager::freeRegion
void freeRegion(uint32_t firstIdx, uint32_t lastIdx)
Definition: simple_pool_manager.cc:77
PoolManager::minAllocation
uint32_t minAllocation()
Definition: pool_manager.hh:50
std::pair
STL pair class.
Definition: stl.hh:58
SimplePoolManager::canAllocate
bool canAllocate(uint32_t numRegions, uint32_t size)
Definition: simple_pool_manager.cc:71
SimplePoolManager::_reservedGroups
uint32_t _reservedGroups
Definition: simple_pool_manager.hh:68
SimplePoolManager::_regionSize
uint32_t _regionSize
Definition: simple_pool_manager.hh:64
logging.hh
PoolManager::poolSize
uint32_t poolSize()
Definition: pool_manager.hh:59
SimplePoolManager::allocateRegion
uint32_t allocateRegion(const uint32_t size, uint32_t *reservedPoolSize)
Definition: simple_pool_manager.cc:87
SimplePoolManager::_nxtFreeIdx
int _nxtFreeIdx
Definition: simple_pool_manager.hh:66
fatal_if
#define fatal_if(cond,...)
Conditional fatal macro that checks the supplied condition and only causes a fatal error if the condi...
Definition: logging.hh:219
SimplePoolManager::regionSize
uint32_t regionSize(std::pair< uint32_t, uint32_t > &region)
Definition: simple_pool_manager.cc:102

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