Messages in this thread | | | Date | Thu, 2 Dec 2004 17:08:15 -0200 | From | Marcelo Tosatti <> | Subject | Re: HIGHMEM=4G slows down ps2pdf with 2.4.28 |
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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/
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