lkml.org 
[lkml]   [2004]   [Dec]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: HIGHMEM=4G slows down ps2pdf with 2.4.28
On Wed, Dec 01, 2004 at 11:25:22PM +0100, Alain Tesio wrote:
> Hi,
>
> With a 2.4.28 kernel, 1.5 Go RAM and nothing exotic, everything works fine
> with CONFIG_HIGHMEM4G and CONFIG_HIGHMEM=y except that
> ps2pdf is about 30 times slower
>
> ps2pdf is a script using ghostscript with device=pdfwriter, I don't know if he's
> doing something special with memory allocations.
>
> If you want to test it, use this file:
> http://www.floc.net/observer/USDP/hoyteclassical/hoyteclassical.ps
> (gs-gpl 8.01 on debian sid)
>
> Other usual server daemons seems unaffected.
>
> If this is a known behaviour for HIGHMEM to slow down random apps, it will
> be nice to put a warning in the make config help !

How does /proc/mtrr look like?

Maybe some of your memory is configured as uncacheable.

> #lspci | grep bridge
> cat /proc0000:00:00.0 Host bridge: Intel Corp. 82865G/PE/P DRAM Controller/Host-Hub Interface (rev 02)
> 0000:00:1e.0 PCI bridge: Intel Corp. 82801 PCI Bridge (rev c2)
> 0000:00:1f.0 ISA bridge: Intel Corp. 82801EB/ER (ICH5/ICH5R) LPC Bridge (rev 02)
>
> #cat /proc/meminfo
> total: used: free: shared: buffers: cached:
> Mem: 1579692032 1522913280 56778752 0 194080768 798294016
> Swap: 2147467264 19042304 2128424960
> MemTotal: 1542668 kB
> MemFree: 55448 kB
> MemShared: 0 kB
> Buffers: 189532 kB
> Cached: 766428 kB
> SwapCached: 13156 kB
> Active: 461848 kB
> Inactive: 800564 kB
> HighTotal: 646336 kB
> HighFree: 2044 kB
> LowTotal: 896332 kB
> LowFree: 53404 kB
> SwapTotal: 2097136 kB
> SwapFree: 2078540 kB
>
> #cat /proc/cpuinfo
> processor : 0
> vendor_id : GenuineIntel
> cpu family : 15
> model : 2
> model name : Intel(R) Pentium(R) 4 CPU 3.40GHz
> stepping : 9
> cpu MHz : 3400.211
> cache size : 512 KB
> fdiv_bug : no
> hlt_bug : no
> f00f_bug : no
> coma_bug : no
> fpu : yes
> fpu_exception : yes
> cpuid level : 2
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid
> bogomips : 6789.52
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 14:08    [W:0.048 / U:0.048 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site