From: Aurelien Jarno <aurelien@aurel32.net>
To: libc-ports@sourceware.org
Subject: [PATCH][alpha] Fix _SC_LEVEL*CACHE*
Date: Fri, 01 Apr 2011 21:19:00 -0000 [thread overview]
Message-ID: <20110401211854.GC16226@hall.aurel32.net> (raw)
sysconf() on alpha returns improper results for _SC_LEVEL*CACHE*
entries:
| LEVEL1_ICACHE_SIZE 64
| LEVEL1_ICACHE_ASSOC 65536
| LEVEL1_ICACHE_LINESIZE 2
| LEVEL1_DCACHE_SIZE 64
| LEVEL1_DCACHE_ASSOC 65536
|Â LEVEL1_DCACHE_LINESIZE 2
| LEVEL2_CACHE_SIZE 64
| LEVEL2_CACHE_ASSOC 4194304
| LEVEL2_CACHE_LINESIZE 1
This is due to the entries number being not properly aligned on modulo
3. This probably used to work at some point, but now that more entries
have been added, it doesn't work anymore. The patch below fixes that.
2011-04-01 Aurelien Jarno <aurelien@aurel32.net>
* sysdeps/unix/sysv/linux/alpha/sysconf.c: Fix cache sysconf
switch.
diff --git a/sysdeps/unix/sysv/linux/alpha/sysconf.c b/sysdeps/unix/sysv/linux/alpha/sysconf.c
index 51a2a47..30faa3f 100644
--- a/sysdeps/unix/sysv/linux/alpha/sysconf.c
+++ b/sysdeps/unix/sysv/linux/alpha/sysconf.c
@@ -135,7 +135,7 @@ __sysconf (int name)
if (shape <= 0)
return shape;
- switch (name % 3)
+ switch ((name - _SC_LEVEL1_ICACHE_SIZE) % 3)
{
case 0: /* total size */
return shape & -0x100;
--
Aurelien Jarno GPG: 1024D/F1BCDB73aurelien@aurel32.net http://www.aurel32.net
next reply other threads:[~2011-04-01 21:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-01 21:19 Aurelien Jarno [this message]
2012-02-19 12:51 ` Aurelien Jarno
2012-02-20 16:40 ` Richard Henderson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20110401211854.GC16226@hall.aurel32.net \
--to=aurelien@aurel32.net \
--cc=libc-ports@sourceware.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).