pitrou commented on code in PR #13516:
URL: https://github.com/apache/arrow/pull/13516#discussion_r972904264
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cpp/src/arrow/memory_pool_jemalloc.cc:
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@@ -153,4 +154,52 @@ Status jemalloc_set_decay_ms(int ms) {
#undef RETURN_IF_JEMALLOC_ERROR
+#ifdef ARROW_JEMALLOC
+Result<uint64_t> jemalloc_get_stat(const char* name) {
+ size_t sz = sizeof(uint64_t);
+ int err;
+ uint64_t value;
+
+ if (std::strcmp(name, "stats.allocated") == 0 ||
+ std::strcmp(name, "stats.active") == 0 ||
+ std::strcmp(name, "stats.metadata") == 0 ||
+ std::strcmp(name, "stats.resident") == 0 ||
+ std::strcmp(name, "stats.mapped") == 0 ||
+ std::strcmp(name, "stats.retained") == 0) {
+ uint64_t epoch;
+ mallctl("epoch", &epoch, &sz, &epoch, sz);
Review Comment:
That looks fine to me.
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