Re: Re: [gentoo-user] gcc seg faults very often

Re: Re: [gentoo-user] gcc seg faults very often

[Michael Kintzios]

[-- Attachment #1: Type: text/plain, Size: 1824 bytes --]

> From:: Eugene Rosenzweig <eugene259@internode.on.net>
> To: gentoo-user@lists.gentoo.org
> Subject: Re: [gentoo-user] gcc seg faults very often
> Date: Wed, 24 Aug 2005 01:03:01 +1000

> Raphael Melo de Oliveira Bastos Sales wrote:
> 
> >After running memtest, several errors have occurred. Does that mean I
> >have to buy new memory?
> >
> >2005/8/22, Volker Armin Hemmann <volker.armin.hemmann@tu-claustha al.de>:
> >  
> >
> >>On Monday 22 August 2005 21:29, Raphael Melo de Oliveira Bastos Sales wrote:
> >>    
> >>
> >>>Hi Richard,
> >>>
> >>>    First of all, thanks for replying. I'll test the swap partition
> >>>with the command you sent. But how do I test the memory? Is there any
> >>>way to do it? I think I configured CMOS to do a memory check during
> >>>start up.
> >>>
> >>>      
> >>>
> >>please install memtest86 or memtest86+ and let it run for some others.
> >>
> >>gcc segfaults are a very good sign of memory problems - and please the
> >>bios-'check' is not a 'check' - never was!
> >>
> >>The bios counts the available memory - this is not a check but accounting.
> >>--
> >>gentoo-user@gentoo.org mailing list
> >>    
> >>
> You can check memory settings in the BIOS, most BIOSes nowadays have 
> options to change memory timings so you can set more relaxed ones and 
> see if the errors disappear. Also you can try good oldfashioned 
> re-seating of the memory modules, take them out and insert them again.
> 
> Eugene.

I remember an application which would identify the bad memory cells and isolate them so that your machine could happily carry on using the rest of the memory - unfortunately just like yours my memory is not what it used to be . . .  ;-)

I've googled but can't find it.
-- 
Regards,
Mick

Lycos email has now 300 Megabytes of free storage... Get it now at mail.lycos.co.uk

Re: Re: [gentoo-user] gcc seg faults very often

[Raphael Melo de Oliveira Bastos Sales]

Yes, I found a kernel patch that does that. It allocates all the bad
memory sectors in kernel space permanetely, so they can't be used.
But, I found it too late. The memory is so bad now that it doesn't
even tries to boot. It just stops after detecting all IDE devices.
Gonna have to buy new memory boards...

if anyone ever need it: http://rick.vanrein.org/linux/badram/

2005/8/23, Michael Kintzios <michaelkintzios@lycos.co.uk>:
> > From:: Eugene Rosenzweig <eugene259@internode.on.net>
> > To: gentoo-user@lists.gentoo.org
> > Subject: Re: [gentoo-user] gcc seg faults very often
> > Date: Wed, 24 Aug 2005 01:03:01 +1000
> 
> > Raphael Melo de Oliveira Bastos Sales wrote:
> >
> > >After running memtest, several errors have occurred. Does that mean I
> > >have to buy new memory?
> > >
> > >2005/8/22, Volker Armin Hemmann <volker.armin.hemmann@tu-claustha al.de>:
> > >
> > >
> > >>On Monday 22 August 2005 21:29, Raphael Melo de Oliveira Bastos Sales wrote:
> > >>
> > >>
> > >>>Hi Richard,
> > >>>
> > >>>    First of all, thanks for replying. I'll test the swap partition
> > >>>with the command you sent. But how do I test the memory? Is there any
> > >>>way to do it? I think I configured CMOS to do a memory check during
> > >>>start up.
> > >>>
> > >>>
> > >>>
> > >>please install memtest86 or memtest86+ and let it run for some others.
> > >>
> > >>gcc segfaults are a very good sign of memory problems - and please the
> > >>bios-'check' is not a 'check' - never was!
> > >>
> > >>The bios counts the available memory - this is not a check but accounting.
> > >>--
> > >>gentoo-user@gentoo.org mailing list
> > >>
> > >>
> > You can check memory settings in the BIOS, most BIOSes nowadays have
> > options to change memory timings so you can set more relaxed ones and
> > see if the errors disappear. Also you can try good oldfashioned
> > re-seating of the memory modules, take them out and insert them again.
> >
> > Eugene.
> 
> I remember an application which would identify the bad memory cells and isolate them so that your machine could happily carry on using the rest of the memory - unfortunately just like yours my memory is not what it used to be . . .  ;-)
> 
> I've googled but can't find it.
> --
> Regards,
> Mick
> 
> Lycos email has now 300 Megabytes of free storage... Get it now at mail.lycos.co.uk
>

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Re: [gentoo-user] gcc seg faults very often

[Volker Armin Hemmann]

On Wednesday 24 August 2005 02:16, Raphael Melo de Oliveira Bastos Sales 
wrote:
> Yes, I found a kernel patch that does that. It allocates all the bad
> memory sectors in kernel space permanetely, so they can't be used.
> But, I found it too late. The memory is so bad now that it doesn't
> even tries to boot. It just stops after detecting all IDE devices.
> Gonna have to buy new memory boards...
>

when your ram becomes worse in some few days, there is a great chance, that 
not the ram, but the PSU is the culprit.

When a PSU is becoming weak, it is not able to hold the voltages at sufficient 
levels - lockups and ram-errors are then common problems.
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Re: [gentoo-user] gcc seg faults very often

[Raphael Melo de Oliveira Bastos Sales]

I'll test the memory chip on another computer and see if it works...

2005/8/23, Volker Armin Hemmann <volker.armin.hemmann@tu-clausthal.de>:
> On Wednesday 24 August 2005 02:16, Raphael Melo de Oliveira Bastos Sales
> wrote:
> > Yes, I found a kernel patch that does that. It allocates all the bad
> > memory sectors in kernel space permanetely, so they can't be used.
> > But, I found it too late. The memory is so bad now that it doesn't
> > even tries to boot. It just stops after detecting all IDE devices.
> > Gonna have to buy new memory boards...
> >
> 
> when your ram becomes worse in some few days, there is a great chance, that
> not the ram, but the PSU is the culprit.
> 
> When a PSU is becoming weak, it is not able to hold the voltages at sufficient
> levels - lockups and ram-errors are then common problems.
> --
> gentoo-user@gentoo.org mailing list
> 
>

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Re: [gentoo-user] gcc seg faults very often

[Raphael Melo de Oliveira Bastos Sales]

No, the memory is wasted. :(

2005/8/24, Raphael Melo de Oliveira Bastos Sales <raphael.melo21@gmail.com>:
> I'll test the memory chip on another computer and see if it works...
> 
> 2005/8/23, Volker Armin Hemmann <volker.armin.hemmann@tu-clausthal.de>:
> > On Wednesday 24 August 2005 02:16, Raphael Melo de Oliveira Bastos Sales
> > wrote:
> > > Yes, I found a kernel patch that does that. It allocates all the bad
> > > memory sectors in kernel space permanetely, so they can't be used.
> > > But, I found it too late. The memory is so bad now that it doesn't
> > > even tries to boot. It just stops after detecting all IDE devices.
> > > Gonna have to buy new memory boards...
> > >
> >
> > when your ram becomes worse in some few days, there is a great chance, that
> > not the ram, but the PSU is the culprit.
> >
> > When a PSU is becoming weak, it is not able to hold the voltages at sufficient
> > levels - lockups and ram-errors are then common problems.
> > --
> > gentoo-user@gentoo.org mailing list
> >
> >
>

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[gentoo-user] gcc seg faults very often

[Raphael Melo de Oliveira Bastos Sales]

Hi there, 

   I'm using gcc-3.3.5.20050130-r1 and I keep getting segmentation
fault every now and then. Since it doesn't work, I can't compile an
earlier, more stable version. I hope it isn't a hardware failure,
because the warranty on my new computer just ended. It is probably not
an memory error, because I'm not using -pipe. I checked the filesystem
and no corruption was found.

   Anybody had this type of error too? If so, how did you handle it?
Are there any tools to check the hard drive's surface for flaws?

Thanks for the attention,

Raphael

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Re: [gentoo-user] gcc seg faults very often

[Richard Fish]

Raphael Melo de Oliveira Bastos Sales wrote:

>Hi there, 
>
>   I'm using gcc-3.3.5.20050130-r1 and I keep getting segmentation
>fault every now and then. Since it doesn't work, I can't compile an
>earlier, more stable version. I hope it isn't a hardware failure,
>because the warranty on my new computer just ended. It is probably not
>an memory error, because I'm not using -pipe. I checked the filesystem
>and no corruption was found.
>  
>

Don't be so sure.  -pipe doesn't add that much additional memory 
overhead, in fact, only a few pages used as an IO buffer between the 
processes.  The process of compiling itself is very tough on memory, 
reading and writing to various locations in rapid succession.

I would say memory is the most likely problem, but it could be 
overheating or power supply problems also.

>   Anybody had this type of error too? If so, how did you handle it?
>Are there any tools to check the hard drive's surface for flaws?
>  
>

Bad disk blocks are almost certainly not the issue, as you would end up 
with IO errors during the compilation, not segfaults.  Well, I guess if 
your swap had bad blocks, you might get a segfault...

Anyway, "dd if=/dev/hda of=/dev/null bs=4k" will test readability of 
your entire disk.  It doesn't test the validity of your data though...

-Richard

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Re: [gentoo-user] gcc seg faults very often

[Raphael Melo de Oliveira Bastos Sales]

Hi Richard,

    First of all, thanks for replying. I'll test the swap partition
with the command you sent. But how do I test the memory? Is there any
way to do it? I think I configured CMOS to do a memory check during
start up.

    Also, I'm using -march=i686 -O2 -fomit-frame-pointer, since I
don't know if a higher value is compatible with my AMD Sempron.

2005/8/22, Richard Fish <bigfish@asmallpond.org>:
> Raphael Melo de Oliveira Bastos Sales wrote:
> 
> >Hi there,
> >
> >   I'm using gcc-3.3.5.20050130-r1 and I keep getting segmentation
> >fault every now and then. Since it doesn't work, I can't compile an
> >earlier, more stable version. I hope it isn't a hardware failure,
> >because the warranty on my new computer just ended. It is probably not
> >an memory error, because I'm not using -pipe. I checked the filesystem
> >and no corruption was found.
> >
> >
> 
> Don't be so sure.  -pipe doesn't add that much additional memory
> overhead, in fact, only a few pages used as an IO buffer between the
> processes.  The process of compiling itself is very tough on memory,
> reading and writing to various locations in rapid succession.
> 
> I would say memory is the most likely problem, but it could be
> overheating or power supply problems also.
> 
> >   Anybody had this type of error too? If so, how did you handle it?
> >Are there any tools to check the hard drive's surface for flaws?
> >
> >
> 
> Bad disk blocks are almost certainly not the issue, as you would end up
> with IO errors during the compilation, not segfaults.  Well, I guess if
> your swap had bad blocks, you might get a segfault...
> 
> Anyway, "dd if=/dev/hda of=/dev/null bs=4k" will test readability of
> your entire disk.  It doesn't test the validity of your data though...
> 
> -Richard
> 
> --
> gentoo-user@gentoo.org mailing list
> 
>

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Re: [gentoo-user] gcc seg faults very often

[R'twick Niceorgaw]

Hi Raphael,

On Mon, August 22, 2005 3:29 pm, Raphael Melo de Oliveira Bastos Sales said:
> But how do I test the memory?

memtest86 will do it.


>> >   I'm using gcc-3.3.5.20050130-r1 and I keep getting segmentation
fault every now and then.

I also had the same gcc segfault problem recently. After some observation,
I found out whenever cpu temperature goes beyond 50 C I was getting
segfaults. Took out the heat sink and cpu, cleaned them put some arctic
silver between cpu and heat sink and put a fan in front of the box and did
a emerge -Uv world  without any problem even though temperature reached
65. I believe, its the arctic silver that I put between cpu and heat sink
fixed my problem.

HTH
R'twick
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Re: [gentoo-user] gcc seg faults very often

[Raphael Melo de Oliveira Bastos Sales]

Any good tools for checking temperature and other system stats?

2005/8/22, R'twick Niceorgaw <rtwick@utkalika.net>:
> Hi Raphael,
> 
> On Mon, August 22, 2005 3:29 pm, Raphael Melo de Oliveira Bastos Sales said:
> > But how do I test the memory?
> 
> memtest86 will do it.
> 
> 
> >> >   I'm using gcc-3.3.5.20050130-r1 and I keep getting segmentation
> fault every now and then.
> 
> I also had the same gcc segfault problem recently. After some observation,
> I found out whenever cpu temperature goes beyond 50 C I was getting
> segfaults. Took out the heat sink and cpu, cleaned them put some arctic
> silver between cpu and heat sink and put a fan in front of the box and did
> a emerge -Uv world  without any problem even though temperature reached
> 65. I believe, its the arctic silver that I put between cpu and heat sink
> fixed my problem.
> 
> HTH
> R'twick
> --
> gentoo-user@gentoo.org mailing list
> 
>

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Re: [gentoo-user] gcc seg faults very often

[R'twick Niceorgaw]

On Mon, August 22, 2005 4:28 pm, Raphael Melo de Oliveira Bastos Sales said:
> Any good tools for checking temperature and other system stats?
>

I use gkrellm2. Make sure you have the acpi (thermal, fan etc) modules
built and loaded for your kernel.

-R'twick
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Re: [gentoo-user] gcc seg faults very often

[Raphael Melo de Oliveira Bastos Sales]

Thanks to both R'twick and Volker. I'll try them out, tonight, after I
take my girlfriend for pizza ;)

2005/8/22, R'twick Niceorgaw <rtwick-gentoo@utkalika.net>:
> On Mon, August 22, 2005 4:28 pm, Raphael Melo de Oliveira Bastos Sales said:
> > Any good tools for checking temperature and other system stats?
> >
> 
> I use gkrellm2. Make sure you have the acpi (thermal, fan etc) modules
> built and loaded for your kernel.
> 
> -R'twick
> --
> gentoo-user@gentoo.org mailing list
> 
>

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Re: [gentoo-user] gcc seg faults very often

[Volker Armin Hemmann]

On Monday 22 August 2005 22:28, Raphael Melo de Oliveira Bastos Sales wrote:
> Any good tools for checking temperature and other system stats?
>

lms_sensors + gkrellm, ksensors ... 
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Re: [gentoo-user] gcc seg faults very often

[Mariusz Pękala]

On 2005-08-22 10:57:47 -0400 (Mon, Aug), R'twick Niceorgaw wrote:
> 
> I also had the same gcc segfault problem recently. After some observation,
> I found out whenever cpu temperature goes beyond 50 C I was getting
> segfaults. Took out the heat sink and cpu, cleaned them put some arctic
> silver between cpu and heat sink and put a fan in front of the box and did
> a emerge -Uv world  without any problem even though temperature reached
> 65. I believe, its the arctic silver that I put between cpu and heat sink
> fixed my problem.

I am in the middle of troubleshooting similiar (lockups, not segfaults) situation.
Maybe it will be of some use to somebody.

During some emerges my machine was getting locked up when cpu temperature got
above 55 C (AMD Athlon 2GB), but I decided (yeah - decided ;-) that CPU is not the
problem - 55 C is pretty low for CPU I think.

As a workaround I have limited the RAM amount available (I have 512 MB
physical) to 256 MB by kernel parameter mem=256M. No RAM errors were detected by
memtest, but limiting available RAM works - no lockups.

The 'sensors' utility (part of lm_sensors package) shows that one (out of two)
temperature sensor is a bit too hot: it has now (no emerge in progress)
61 C and warning threshold is on 48 C. I assume that it is not CPU that
gets too hot but that small, nice north bridge on my mobo.

May it be that the solution is to get some bigger heat sink and more
powerful fan not only for CPU.

HTH


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Re: [gentoo-user] gcc seg faults very often

[Raphael Melo de Oliveira Bastos Sales]

I faced  lockups problems during high mem/cpu/io conditions on another
computer. Turned out to be the power source that was inadequate (is
that how it is spelled?). Most motherboard simply reboot the system
when close to overheating conditions. And they normally beep a lot
before that happens.

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Re: [gentoo-user] gcc seg faults very often

[Volker Armin Hemmann]

On Monday 22 August 2005 21:29, Raphael Melo de Oliveira Bastos Sales wrote:
> Hi Richard,
>
>     First of all, thanks for replying. I'll test the swap partition
> with the command you sent. But how do I test the memory? Is there any
> way to do it? I think I configured CMOS to do a memory check during
> start up.
>

please install memtest86 or memtest86+ and let it run for some others.

gcc segfaults are a very good sign of memory problems - and please the 
bios-'check' is not a 'check' - never was!

The bios counts the available memory - this is not a check but accounting.
-- 
gentoo-user@gentoo.org mailing list

Re: [gentoo-user] gcc seg faults very often

[Raphael Melo de Oliveira Bastos Sales]

I didn't know that. Good to learn. I'll use the memtest from the live
cd, since I can install it without the compiler working well...

2005/8/22, Volker Armin Hemmann <volker.armin.hemmann@tu-clausthal.de>:
> On Monday 22 August 2005 21:29, Raphael Melo de Oliveira Bastos Sales wrote:
> > Hi Richard,
> >
> >     First of all, thanks for replying. I'll test the swap partition
> > with the command you sent. But how do I test the memory? Is there any
> > way to do it? I think I configured CMOS to do a memory check during
> > start up.
> >
> 
> please install memtest86 or memtest86+ and let it run for some others.
> 
> gcc segfaults are a very good sign of memory problems - and please the
> bios-'check' is not a 'check' - never was!
> 
> The bios counts the available memory - this is not a check but accounting.
> --
> gentoo-user@gentoo.org mailing list
> 
>

-- 
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Re: [gentoo-user] gcc seg faults very often

[Raphael Melo de Oliveira Bastos Sales]

After running memtest, several errors have occurred. Does that mean I
have to buy new memory?

2005/8/22, Volker Armin Hemmann <volker.armin.hemmann@tu-clausthal.de>:
> On Monday 22 August 2005 21:29, Raphael Melo de Oliveira Bastos Sales wrote:
> > Hi Richard,
> >
> >     First of all, thanks for replying. I'll test the swap partition
> > with the command you sent. But how do I test the memory? Is there any
> > way to do it? I think I configured CMOS to do a memory check during
> > start up.
> >
> 
> please install memtest86 or memtest86+ and let it run for some others.
> 
> gcc segfaults are a very good sign of memory problems - and please the
> bios-'check' is not a 'check' - never was!
> 
> The bios counts the available memory - this is not a check but accounting.
> --
> gentoo-user@gentoo.org mailing list
> 
>

-- 
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Re: [gentoo-user] gcc seg faults very often

[Eugene Rosenzweig]

Raphael Melo de Oliveira Bastos Sales wrote:

>After running memtest, several errors have occurred. Does that mean I
>have to buy new memory?
>
>2005/8/22, Volker Armin Hemmann <volker.armin.hemmann@tu-clausthal.de>:
>  
>
>>On Monday 22 August 2005 21:29, Raphael Melo de Oliveira Bastos Sales wrote:
>>    
>>
>>>Hi Richard,
>>>
>>>    First of all, thanks for replying. I'll test the swap partition
>>>with the command you sent. But how do I test the memory? Is there any
>>>way to do it? I think I configured CMOS to do a memory check during
>>>start up.
>>>
>>>      
>>>
>>please install memtest86 or memtest86+ and let it run for some others.
>>
>>gcc segfaults are a very good sign of memory problems - and please the
>>bios-'check' is not a 'check' - never was!
>>
>>The bios counts the available memory - this is not a check but accounting.
>>--
>>gentoo-user@gentoo.org mailing list
>>    
>>
You can check memory settings in the BIOS, most BIOSes nowadays have 
options to change memory timings so you can set more relaxed ones and 
see if the errors disappear. Also you can try good oldfashioned 
re-seating of the memory modules, take them out and insert them again.

Eugene.

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Re: [gentoo-user] gcc seg faults very often

[Volker Armin Hemmann]

On Tuesday 23 August 2005 17:03, Eugene Rosenzweig wrote:

>
> You can check memory settings in the BIOS, most BIOSes nowadays have
> options to change memory timings so you can set more relaxed ones and
> see if the errors disappear. Also you can try good oldfashioned
> re-seating of the memory modules, take them out and insert them again.
>

and if the errors stay with new ram, try a new PSU ;)
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