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 class PhysicalMemProfile:
   8     def __init__(self) -> None:
   9         super().__init__()
  10         self._pmem    = PMem(LunaixSymbols.debug_sym("pmm", "memory").value().address)
  11
  12         self.max_mem_pg = self._pmem.list_len()
  13         self.max_mem_sz = self.max_mem_pg * 4096
  14         self.mem_distr = []
  15
  16     def rescan_pmem(self, distr_granule = 256):
  17         self.__mem_distr_granule = distr_granule
  18         self.mem_distr.clear()
  19
  20         pplist = self._pmem.pplist()
  21         page_per_granule = self.max_mem_pg / self.__mem_distr_granule
  22         page_per_granule = math.ceil(page_per_granule)
  23         remainder = self.max_mem_pg % self.__mem_distr_granule
  24         bucket = 0
  25         non_contig = 0
  26         last_contig = False
  27
  28         for i in range(self.max_mem_pg):
  29             element = PageStruct(pplist[i].address)
  30             bucket += int(element.busy())
  31             if last_contig:
  32                 last_contig = element.busy()
  33                 non_contig += int(not last_contig)
  34             else:
  35                 last_contig = element.busy()
  36
  37             if (i + 1) % page_per_granule == 0:
  38                 self.mem_distr.append(bucket)
  39                 bucket = 0
  40
  41         if remainder > 0:
  42             if bucket > 0:
  43                 bucket += page_per_granule - remainder
  44             self.mem_distr.append(bucket)
  45
  46         self.consumed_pg = sum(self.mem_distr)
  47         self.utilisation = self.consumed_pg / self.max_mem_pg
  48         self.fragmentation = 2 * non_contig / self.max_mem_pg
  49         self.discontig = non_contig
  50         self.page_per_granule = page_per_granule
  51