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chore: add clear metric for the fragmentation waste (#1735)

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Roman Gershman 2023-08-24 20:17:12 +03:00 committed by GitHub
parent 731f36edd2
commit 5aa63a68dd
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1 changed files with 7 additions and 5 deletions
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12
src/server/memory_cmd.cc
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@ -52,17 +52,19 @@ std::string MallocStats(bool backing, unsigned tid) {
mi_heap_visit_blocks(data_heap, false /* visit all blocks*/, MiArenaVisit, &block_map);
uint64_t reserved = 0, committed = 0, used = 0;
for (const auto& k_v : block_map) {
absl::StrAppend(&str, k_v.second, " ", get<0>(k_v.first), " ", get<1>(k_v.first), " ",
uint64_t count = k_v.second;
absl::StrAppend(&str, count, " ", get<0>(k_v.first), " ", get<1>(k_v.first), " ",
get<2>(k_v.first), " ", get<3>(k_v.first), "\n");
reserved += k_v.second * get<1>(k_v.first);
committed += k_v.second * get<2>(k_v.first);
used += k_v.second * get<3>(k_v.first);
reserved += count * get<1>(k_v.first);
committed += count * get<2>(k_v.first);
used += count * get<3>(k_v.first);
}
uint64_t delta = (absl::GetCurrentTimeNanos() - start) / 1000;
absl::StrAppend(&str, "--- End mimalloc statistics, took ", delta, "us ---\n");
absl::StrAppend(&str, "total reserved: ", reserved, ", comitted: ", committed, ", used: ", used,
"\n");
"fragmentation waste: ", (100.0 * (committed - used)) / std::max(1UL, committed),
"%\n");
return str;
}