lunaix-os/scripts/gdb/lunadbg/profiling/pmstat.py

   1 from ..symbols import LunaixSymbols
   2 from ..structs.page import PageStruct
   3 from ..structs.pmem import PMem
   4 from ..pp import MyPrettyPrinter
   5 import math
   6
   7 ENTER_CONTIG = 0
   8 LEAVE_CONTIG = 1
   9
  10 class PhysicalMemProfile:
  11     def __init__(self) -> None:
  12         super().__init__()
  13         self._pmem    = PMem(LunaixSymbols.debug_sym("pmm", "memory").value().address)
  14
  15         self.max_mem_pg = self._pmem.list_len()
  16         self.max_mem_sz = self.max_mem_pg * 4096
  17         self.mem_distr = []
  18
  19     def rescan_pmem(self, distr_granule = 256):
  20         self.__mem_distr_granule = distr_granule
  21         self.mem_distr.clear()
  22
  23         pplist = self._pmem.pplist()
  24         page_per_granule = int(self.max_mem_pg) // self.__mem_distr_granule
  25         remainder = self.max_mem_pg % self.__mem_distr_granule
  26         bucket = 0
  27         non_contig = 0
  28         contig_state = LEAVE_CONTIG
  29         new_state = LEAVE_CONTIG
  30
  31         i = 0
  32         while i < self.max_mem_pg:
  33             element = PageStruct(pplist[i].address)
  34
  35             nr_pgs = 1
  36             if element.lead_page():
  37                 nr_pgs = 1 << element.order
  38                 if element.busy():
  39                     bucket += nr_pgs
  40                     new_state = ENTER_CONTIG
  41                 else:
  42                     new_state = LEAVE_CONTIG
  43
  44             i += nr_pgs
  45
  46             if contig_state != new_state:
  47                 non_contig += int(new_state == LEAVE_CONTIG)
  48                 contig_state = new_state
  49
  50             if i % page_per_granule == 0:
  51                 self.mem_distr.append(bucket)
  52                 bucket = 0
  53
  54         if remainder > 0:
  55             if bucket > 0:
  56                 bucket += page_per_granule - remainder
  57             self.mem_distr.append(bucket)
  58
  59         self.consumed_pg = sum(self.mem_distr)
  60         self.utilisation = self.consumed_pg / self.max_mem_pg
  61         self.fragmentation = 2 * non_contig / self.max_mem_pg
  62         self.discontig = non_contig
  63         self.page_per_granule = page_per_granule
  64