diff options
| author | Thomas Prescher <thomas.prescher@cyberus-technology.de> | 2025-02-27 23:45:07 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-03-17 00:05:37 -0700 |
| commit | 70478a5534af757f9bbc65bbb25b607bd0e69890 (patch) | |
| tree | ac8e9c35d993fd548943485e5f2dc6f51bc7c6a8 /mm/hugetlb.c | |
| parent | 71f745688985c59eee41ffe88497a9e62774a9bf (diff) | |
mm: hugetlb: log time needed to allocate hugepages
Having this information allows users to easily tune the
hugepages_node_threads parameter.
Link: https://lkml.kernel.org/r/20250227-hugepage-parameter-v2-3-7db8c6dc0453@cyberus-technology.de
Signed-off-by: Thomas Prescher <thomas.prescher@cyberus-technology.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Muchun Song <muchun.song@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 486365cb2ece..7a47a08e8526 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -3608,6 +3608,9 @@ 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; @@ -3635,7 +3638,14 @@ 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_allocation_threads=%ld\n", + jiffies_to_msecs(jiffies_end - jiffies_start), + hugepage_allocation_threads); return h->nr_huge_pages; } |