gem5  v22.0.0.1
simple_pool_manager.cc
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31 
33 
34 #include "base/logging.hh"
35 
36 namespace gem5
37 {
38 
39 // return the min number of elements that the manager can reserve given
40 // a request for "size" elements
41 uint32_t
43 {
44  fatal_if(size <= 0 || size > poolSize(), "Illegal VGPR region size=%d\n",
45  size);
46 
47  return size % minAllocation() > 0 ?
48  (minAllocation() - (size % minAllocation())) + size : size;
49 }
50 
51 std::string
53 {
54  std::string _cout;
55  if (_reservedGroups == 0)
56  _cout = "VRF is empty\n";
57  else if (_reservedGroups > 0) {
58  uint32_t reservedEntries = _reservedGroups * _regionSize;
59  _cout = "VRF reserves " + std::to_string(reservedEntries) + " VGPRs\n";
60  }
61 
62  return _cout;
63 }
64 
65 bool
66 SimplePoolManager::canAllocate(uint32_t numRegions, uint32_t size)
67 {
68  return _reservedGroups == 0;
69 }
70 
71 void
72 SimplePoolManager::freeRegion(uint32_t firstIdx, uint32_t lastIdx)
73 {
74  assert(_reservedGroups > 0);
76 
77  if (!_reservedGroups)
78  _nxtFreeIdx = 0;
79 }
80 
81 uint32_t
83  uint32_t *reservedPoolSize)
84 {
85  uint32_t actualSize = minAllocatedElements(size);
86  uint32_t startIdx = _nxtFreeIdx;
87  _nxtFreeIdx += actualSize;
88  _regionSize = actualSize;
89  assert(_nxtFreeIdx < poolSize());
90  *reservedPoolSize = actualSize;
92 
93  return startIdx;
94 }
95 
96 uint32_t
98 {
99  bool wrapAround = (region.first > region.second);
100  if (!wrapAround) {
101  return region.second - region.first + 1;
102  } else {
103  return region.second + poolSize() - region.first + 1;
104  }
105 }
106 
107 } // namespace gem5
simple_pool_manager.hh
gem5::SimplePoolManager::allocateRegion
uint32_t allocateRegion(const uint32_t size, uint32_t *reservedPoolSize)
Definition: simple_pool_manager.cc:82
sc_dt::to_string
const std::string to_string(sc_enc enc)
Definition: sc_fxdefs.cc:91
gem5::SimplePoolManager::_reservedGroups
uint32_t _reservedGroups
Definition: simple_pool_manager.hh:69
gem5::SimplePoolManager::_nxtFreeIdx
int _nxtFreeIdx
Definition: simple_pool_manager.hh:67
gem5::SimplePoolManager::canAllocate
bool canAllocate(uint32_t numRegions, uint32_t size)
Definition: simple_pool_manager.cc:66
gem5::SimplePoolManager::regionSize
uint32_t regionSize(std::pair< uint32_t, uint32_t > &region)
Definition: simple_pool_manager.cc:97
gem5::PoolManager::minAllocation
uint32_t minAllocation()
Definition: pool_manager.hh:51
std::pair
STL pair class.
Definition: stl.hh:58
gem5::SimplePoolManager::minAllocatedElements
uint32_t minAllocatedElements(uint32_t size)
Definition: simple_pool_manager.cc:42
gem5::SimplePoolManager::printRegion
std::string printRegion()
Definition: simple_pool_manager.cc:52
logging.hh
gem5::PoolManager::poolSize
uint32_t poolSize()
Definition: pool_manager.hh:60
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:226
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: gpu_translation_state.hh:37
gem5::SimplePoolManager::_regionSize
uint32_t _regionSize
Definition: simple_pool_manager.hh:65
gem5::SimplePoolManager::freeRegion
void freeRegion(uint32_t firstIdx, uint32_t lastIdx)
Definition: simple_pool_manager.cc:72

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