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Re: why 1G memory is missing?

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  Re: why 1G memory is missing? <loushanguan2015@sina.com> - 2021-08-04 01:30 +0200
    Re: why 1G memory is missing? Jeremy Hendricks <jwh1981@gmail.com> - 2021-08-04 01:40 +0200
      Re: why 1G memory is missing? IL Ka <kazakevichilya@gmail.com> - 2021-08-04 01:50 +0200
        Re: why 1G memory is missing? Jeremy Hendricks <jwh1981@gmail.com> - 2021-08-04 01:50 +0200

#238107 — Re: why 1G memory is missing?

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Thank Andy! my cpu is 32bit 
i have thought pae can support more than 4G memorybut in fact it can't use full 4G memory hardware

$ cat /proc/cpuinfo
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 28
model name	: Intel(R) Atom(TM) CPU N280   @ 1.66GHz
stepping	: 2
microcode	: 0x218
cpu MHz		: 1000.000
cache size	: 512 KB
physical id	: 0
siblings	: 2
core id		: 0
cpu cores	: 1
apicid		: 0
initial apicid	: 0
fdiv_bug	: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 10
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm dtherm
bugs		:
bogomips	: 3325.02
clflush size	: 64
cache_alignment	: 64
address sizes	: 32 bits physical, 32 bits virtual
power management:

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 28
model name	: Intel(R) Atom(TM) CPU N280   @ 1.66GHz
stepping	: 2
microcode	: 0x218
cpu MHz		: 1667.000
cache size	: 512 KB
physical id	: 0
siblings	: 2
core id		: 0
cpu cores	: 1
apicid		: 1
initial apicid	: 1
fdiv_bug	: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 10
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm dtherm
bugs		:
bogomips	: 3325.02
clflush size	: 64
cache_alignment	: 64
address sizes	: 32 bits physical, 32 bits virtual
power management:

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#238108

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That cpu was normally paired with the Intel 945 chipset that can’t support
more than about 3.25GB whether or not it’s 32/64 OS

On Tue, Aug 3, 2021 at 7:24 PM <loushanguan2015@sina.com> wrote:

> Thank Andy! my cpu is 32bit
> i have thought pae can support more than 4G memory
> but in fact it can't use full 4G memory hardware
>
> $ cat /proc/cpuinfo
> processor	: 0
> vendor_id	: GenuineIntel
> cpu family	: 6
> model		: 28
> model name	: Intel(R) Atom(TM) CPU N280   @ 1.66GHz
> stepping	: 2
> microcode	: 0x218
> cpu MHz		: 1000.000
> cache size	: 512 KB
> physical id	: 0
> siblings	: 2
> core id		: 0
> cpu cores	: 1
> apicid		: 0
> initial apicid	: 0
> fdiv_bug	: no
> f00f_bug	: no
> coma_bug	: no
> fpu		: yes
> fpu_exception	: yes
> cpuid level	: 10
> wp		: yes
> flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm dtherm
> bugs		:
> bogomips	: 3325.02
> clflush size	: 64
> cache_alignment	: 64
> address sizes	: 32 bits physical, 32 bits virtual
> power management:
>
> processor	: 1
> vendor_id	: GenuineIntel
> cpu family	: 6
> model		: 28
> model name	: Intel(R) Atom(TM) CPU N280   @ 1.66GHz
> stepping	: 2
> microcode	: 0x218
> cpu MHz		: 1667.000
> cache size	: 512 KB
> physical id	: 0
> siblings	: 2
> core id		: 0
> cpu cores	: 1
> apicid		: 1
> initial apicid	: 1
> fdiv_bug	: no
> f00f_bug	: no
> coma_bug	: no
> fpu		: yes
> fpu_exception	: yes
> cpuid level	: 10
> wp		: yes
> flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm dtherm
> bugs		:
> bogomips	: 3325.02
> clflush size	: 64
> cache_alignment	: 64
> address sizes	: 32 bits physical, 32 bits virtual
> power management:
>
>
>
>

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#238109

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>
>
> That cpu was normally paired with the Intel 945 chipset that can’t support
> more than about 3.25GB whether or not it’s 32/64 OS
>

Yes, and even worse: this CPU doesn't support 64bit OS

> model name	: Intel(R) Atom(TM) CPU N280   @ 1.66GHz
>> address sizes	: 32 bits physical, 32 bits virtual
>>
>>
https://ark.intel.com/content/www/us/en/ark/products/41411/intel-atom-processor-n280-512k-cache-1-66-ghz-667-mhz-fsb.html
 Instruction Set: 32-bit

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#238110

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Yup. That too.

On Tue, Aug 3, 2021 at 7:42 PM IL Ka <kazakevichilya@gmail.com> wrote:

>
>> That cpu was normally paired with the Intel 945 chipset that can’t
>> support more than about 3.25GB whether or not it’s 32/64 OS
>>
>
> Yes, and even worse: this CPU doesn't support 64bit OS
>
>> model name	: Intel(R) Atom(TM) CPU N280   @ 1.66GHz
>>> address sizes	: 32 bits physical, 32 bits virtual
>>>
>>>
> https://ark.intel.com/content/www/us/en/ark/products/41411/intel-atom-processor-n280-512k-cache-1-66-ghz-667-mhz-fsb.html
>  Instruction Set: 32-bit
>
>

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