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

   1 from ..symbols import LunaixSymbols
   2 from ..structs.page import PageStruct
   3 from ..pp import MyPrettyPrinter
   4 import math
   5
   6 class PhysicalMemProfile:
   7     def __init__(self) -> None:
   8         super().__init__()
   9         self._pm_list = LunaixSymbols.debug_sym("pmm", "pm_table")
  10
  11         self.max_mem_pg = int(LunaixSymbols.debug_sym("pmm", "max_pg").value())
  12         self.max_mem_sz = self.max_mem_pg * 4096
  13         self.mem_distr = []
  14
  15     def rescan_pmem(self, distr_granule = 256):
  16         self.__mem_distr_granule = distr_granule
  17         self.mem_distr.clear()
  18
  19         page_per_granule = self.max_mem_pg / self.__mem_distr_granule
  20         page_per_granule = math.ceil(page_per_granule)
  21         remainder = self.max_mem_pg % self.__mem_distr_granule
  22         bucket = 0
  23         non_contig = 0
  24         last_contig = False
  25         for i in range(self.max_mem_pg):
  26             element = PageStruct(self._pm_list[i].address)
  27             bucket += int(element.ref > 0)
  28             if last_contig:
  29                 last_contig = element.ref > 0
  30                 non_contig += int(not last_contig)
  31             else:
  32                 last_contig = element.ref > 0
  33
  34             if (i + 1) % page_per_granule == 0:
  35                 self.mem_distr.append(bucket)
  36                 bucket = 0
  37
  38         if remainder > 0:
  39             if bucket > 0:
  40                 bucket += page_per_granule - remainder
  41             self.mem_distr.append(bucket)
  42
  43         self.consumed_pg = sum(self.mem_distr)
  44         self.utilisation = self.consumed_pg / self.max_mem_pg
  45         self.fragmentation = 2 * non_contig / self.max_mem_pg
  46         self.discontig = non_contig
  47         self.page_per_granule = page_per_granule
  48