Bug 138649 – net-irc/xchat-2.6.2 reports wrong CPU speed

• Status: RESOLVED UPSTREAM
• Product: Gentoo Linux

[Description Mike Hlavac 2006-06-30 19:52:26 UTC]

Xchat 2.6.2 and 2.4.5 both report the wrong CPU speed for my Alpha.  cat /proc/cpuinfo says:

cpu                     : Alpha
cpu model               : EV56
cpu variation           : 7
cpu revision            : 0
cpu serial number       : 
system type             : Miata
system variation        : 0
system revision         : 0
system serial number    : 
cycle frequency [Hz]    : 633149635 est.
timer frequency [Hz]    : 1024.00
page size [bytes]       : 8192
phys. address bits      : 40
max. addr. space #      : 127
BogoMIPS                : 1254.88
kernel unaligned acc    : 0 (pc=0,va=0)
user unaligned acc      : 1 (pc=2000005e928,va=11fa750dc)
platform string         : Digital Personal WorkStation 633au
cpus detected           : 1
L1 Icache               : 8K, 1-way, 32b line
L1 Dcache               : 8K, 1-way, 32b line
L2 cache                : 96K, 3-way, 64b line
L3 cache                : 2048K, 1-way, 64b line

Help -> About XChat reports 603.33 mhz

This is because of the following in common/util.c:

if (!strncmp (buf, "cycle frequency [Hz]\t:", 22))      /* alpha */
{
     *mhz = atoi (buf + 23) / 1048576;
} 

It should be changed to the following since a MHz is defined as 1,000,000 HZ and not 1024 * 1024:

if (!strncmp (buf, "cycle frequency [Hz]\t:", 22))      /* alpha */
{
     *mhz = atoi (buf + 23) / 1000000;
}

[Comment 1 Thomas Cort (RETIRED) 2006-06-30 20:02:46 UTC]

Created attachment 90583 [details, diff]
xchat-2.4.5-alpha-cpu.patch

[Comment 2 Thomas Cort (RETIRED) 2006-06-30 20:03:08 UTC]

Created attachment 90584 [details, diff]
xchat-2.6.2-alpha-cpu.patch

[Comment 3 Thomas Cort (RETIRED) 2006-06-30 20:17:11 UTC]

net-irc, this is a common problem for alpha. It is described in more detail here: http://alpha.gentoo.org/doc/alpha-porting-guide.xml#doc_chap7
The solution Mike proposed is correct. Please apply the patches.

It should be noted that xchat's cpuinfo reader doesn't work on all architectures. It only supports CPU frequency for alpha/i386/amd64/ia64/powerpc/powerpc64/arm. It only gets a proper CPU count for i386/amd64/ia64/hppa/mips/powerpc/powerpc64/sh/cris/m32r. I am currently developing a library for reading cpuinfo files from various architectures. (URL:
https://savannah.nongnu.org/projects/proccpuinfo/ ) It already supports frequency and cpu count on more architectures than are supported by Gentoo. I'll be contacting upstream about using the library.

[Comment 4 Thomas Cort (RETIRED) 2006-07-07 06:27:27 UTC]

Created attachment 91125 [details, diff]
xchat-2.6.4-alpha-cpu.patch

[Comment 5 Thomas Cort (RETIRED) 2006-09-15 06:11:34 UTC]

Created attachment 97046 [details, diff]
xchat-2.6.6-alpha-cpu.patch

Here's a patch for 2.6.6. I thought I sent this upstream, but I'll do it again to be sure.

[Comment 6 Markus Ullmann (RETIRED) 2006-10-19 16:37:14 UTC]

Fixed in 2.6.8 upstream now which is in portage as well now.