[src/trunk]: src/sys/netinet Need larger fat pointers for 128bit cache lines.

[mlelstv <mlelstv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/078abf14e952
branches:  trunk
changeset: 372602:078abf14e952
user:      mlelstv <mlelstv%NetBSD.org@localhost>
date:      Sun Dec 11 08:09:20 2022 +0000

description:
Need larger fat pointers for 128bit cache lines.

diffstat:

 sys/netinet/tcp_vtw.h |  8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diffs (30 lines):

diff -r cc802b67fd02 -r 078abf14e952 sys/netinet/tcp_vtw.h
--- a/sys/netinet/tcp_vtw.h     Sun Dec 11 07:41:37 2022 +0000
+++ b/sys/netinet/tcp_vtw.h     Sun Dec 11 08:09:20 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: tcp_vtw.h,v 1.9 2018/04/19 21:21:44 christos Exp $     */
+/*     $NetBSD: tcp_vtw.h,v 1.10 2022/12/11 08:09:20 mlelstv Exp $     */
 /*
  * Copyright (c) 2011 The NetBSD Foundation, Inc.
  * All rights reserved.
@@ -151,7 +151,11 @@
  */
 struct fatp_mi;
 
+#if CACHE_LINE_SIZE == 128
+typedef uint64_t fatp_word_t;
+#else
 typedef uint32_t fatp_word_t;
+#endif
 
 typedef struct fatp_mi fatp_t;
 
@@ -161,7 +165,7 @@
 #define        FATP_NTAGS      (CACHE_LINE_SIZE / sizeof(fatp_word_t) - 1)
 #define        FATP_NXT_WIDTH  (sizeof(fatp_word_t) * NBBY - FATP_NTAGS)
 
-#define        FATP_MAX        (1 << FATP_NXT_WIDTH)
+#define        FATP_MAX        (1 << (FATP_NXT_WIDTH < 31 ? FATP_NXT_WIDTH : 31))
 
 /* Worked example: ULP32 with 64-byte cacheline (32-bit x86):
  * 15 tags per cacheline.  At most 2^17 fat pointers per fatp_ctl_t.