From: Thomas Prescher <thomas.prescher@xxxxxxxxxxxxxxxxxxxxx>
Having this information allows users to easily tune
the hugepages_node_threads parameter.
Signed-off-by: Thomas Prescher <thomas.prescher@xxxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 98dbfa18bee01d01b40cc7c650cd3eca5eae2457..816e5846222a54255b99515a94e0c1ba9b2b7b27 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -3430,6 +3430,9 @@ static unsigned long __init hugetlb_pages_alloc_boot(struct hstate *h)
.numa_aware = true
};
+ unsigned long jiffies_start;
+ unsigned long jiffies_end;
+
job.thread_fn = hugetlb_pages_alloc_boot_node;
job.start = 0;
job.size = h->max_huge_pages;
@@ -3457,7 +3460,14 @@ static unsigned long __init hugetlb_pages_alloc_boot(struct hstate *h)
job.max_threads = hugepage_allocation_threads;
job.min_chunk = h->max_huge_pages / hugepage_allocation_threads;
+
+ jiffies_start = jiffies;
padata_do_multithreaded(&job);
+ jiffies_end = jiffies;
+
+ pr_info("HugeTLB: allocation took %dms with hugepage_alloc_threads=%ld\n",
+ jiffies_to_msecs(jiffies_end - jiffies_start),
+ hugepage_allocation_threads);
return h->nr_huge_pages;
}
--
2.48.1
