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 = int(self.max_mem_pg) // self.__mem_distr_granule
  22         remainder = self.max_mem_pg % self.__mem_distr_granule
  23         bucket = 0
  24         non_contig = 0
  25         last_contig = False
  26
  27         for i in range(self.max_mem_pg):
  28             element = PageStruct(pplist[i].address)
  29             bucket += int(element.busy())
  30             if last_contig:
  31                 last_contig = element.busy()
  32                 non_contig += int(not last_contig)
  33             else:
  34                 last_contig = element.busy()
  35
  36             if (i + 1) % page_per_granule == 0:
  37                 self.mem_distr.append(bucket)
  38                 bucket = 0
  39
  40         if remainder > 0:
  41             if bucket > 0:
  42                 bucket += page_per_granule - remainder
  43             self.mem_distr.append(bucket)
  44
  45         self.consumed_pg = sum(self.mem_distr)
  46         self.utilisation = self.consumed_pg / self.max_mem_pg
  47         self.fragmentation = 2 * non_contig / self.max_mem_pg
  48         self.discontig = non_contig
  49         self.page_per_granule = page_per_granule
  50