From 145db71f8874c385c38402394592d251de1d140d Mon Sep 17 00:00:00 2001
From: Diogo Netto <diogonetto.dcn@gmail.com>
Date: Thu, 9 Feb 2023 16:59:46 -0300
Subject: [PATCH] steal from all at the end

---
 src/gc.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/gc.c b/src/gc.c
index b9d7588251661..127c7d6d3cc68 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -2582,7 +2582,6 @@ void gc_mark_loop_worker(jl_ptls_t ptls)
         goto pop;
     }
     steal : {
-        // Steal from a random victim
         for (int i = 0; i < 2 * gc_n_threads; i++) {
             uint32_t v = cong(UINT64_MAX, UINT64_MAX, &ptls->rngseed) % gc_n_threads;
             jl_gc_markqueue_t *mq2 = &gc_all_tls_states[v]->mark_queue;
@@ -2590,6 +2589,12 @@ void gc_mark_loop_worker(jl_ptls_t ptls)
             if (new_obj != NULL)
                 goto mark;
         }
+        for (int i = 0; i < gc_n_threads; i++) {
+            jl_gc_markqueue_t *mq2 = &gc_all_tls_states[i]->mark_queue;
+            new_obj = gc_markqueue_steal_from(mq2);
+            if (new_obj != NULL)
+                goto mark;
+        }
     }
     gc_drain_own_chunkqueue(ptls, mq);
     jl_atomic_fetch_add(&gc_n_threads_marking, -1);