Author: mjg
Date: Sat Nov 14 19:19:27 2020
New Revision: 367691
URL: https://svnweb.freebsd.org/changeset/base/367691
Log:
thread: pad tid lock
On a kernel with other changes this bumps 104-way thread creation/destruction
from 0.96 mln ops/s to 1.1 mln ops/s.
Modified:
head/sys/kern/kern_thread.c
Modified: head/sys/kern/kern_thread.c
==============================================================================
--- head/sys/kern/kern_thread.c Sat Nov 14 19:16:39 2020 (r367690)
+++ head/sys/kern/kern_thread.c Sat Nov 14 19:19:27 2020 (r367691)
@@ -135,7 +135,7 @@ static int thread_unsuspend_one(struct thread *td, str
bool boundary);
static void thread_free_batched(struct thread *td);
-static struct mtx tid_lock;
+static __exclusive_cache_line struct mtx tid_lock;
static bitstr_t *tid_bitmap;
static MALLOC_DEFINE(M_TIDHASH, "tidhash", "thread hash");
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