Empathy List Archives

XC

Xavier Clinquart

Tue, Mar 26, 2013 1:03 PM

Hello ,

I am Xavier Clinquart student at the Denayer institute Belgium. And I'm
currently working with the USRP E100 for my thesis .
Now i have been having this segmentation fault that keeps repeating itself
when i try to use the gnuradio-companion. Or when i try to minimise any
other window open at that current time.

I am using the latest image and build from the ettus website and have not
made Any changes to it.

is there anyone who had this problem and found a solution to it?

Greetings

Xavier

Hello , I am Xavier Clinquart student at the Denayer institute Belgium. And I'm currently working with the USRP E100 for my thesis . Now i have been having this segmentation fault that keeps repeating itself when i try to use the gnuradio-companion. Or when i try to minimise any other window open at that current time. I am using the latest image and build from the ettus website and have not made Any changes to it. is there anyone who had this problem and found a solution to it? Greetings Xavier

PB

Philip Balister

Tue, Mar 26, 2013 1:20 PM

On 03/26/2013 09:03 AM, Xavier Clinquart wrote:

Hello ,

I am Xavier Clinquart student at the Denayer institute Belgium. And I'm
currently working with the USRP E100 for my thesis .
Now i have been having this segmentation fault that keeps repeating itself
when i try to use the gnuradio-companion. Or when i try to minimise any
other window open at that current time.

I am using the latest image and build from the ettus website and have not
made Any changes to it.

is there anyone who had this problem and found a solution to it?

Can you send me the output for the console when it segfaults?

Philip

Greetings

Xavier

USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

On 03/26/2013 09:03 AM, Xavier Clinquart wrote: > Hello , > > > I am Xavier Clinquart student at the Denayer institute Belgium. And I'm > currently working with the USRP E100 for my thesis . > Now i have been having this segmentation fault that keeps repeating itself > when i try to use the gnuradio-companion. Or when i try to minimise any > other window open at that current time. > > I am using the latest image and build from the ettus website and have not > made Any changes to it. > > is there anyone who had this problem and found a solution to it? Can you send me the output for the console when it segfaults? Philip > > Greetings > > Xavier > > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >

M

mleech@ripnet.com

Tue, Mar 26, 2013 1:50 PM

On 26 Mar 2013 09:20, Philip Balister wrote:

On 03/26/2013 09:03

AM, Xavier Clinquart wrote:

Hello , I am Xavier Clinquart student

at the Denayer institute Belgium. And I'm currently working with the
USRP E100 for my thesis . Now i have been having this segmentation fault
that keeps repeating itself when i try to use the gnuradio-companion. Or
when i try to minimise any other window open at that current time. I am
using the latest image and build from the ettus website and have not
made Any changes to it. is there anyone who had this problem and found a
solution to it?

Can you send me the output for the console when it

segfaults?

Philip

Greetings Xavier

_______________________________________________ USRP-users mailing list
USRP-users@lists.ettus.com [1]
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com [2]

USRP-users mailing

list

USRP-users@lists.ettus.com

http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

I've
observed, with the latest Gnu Radio on x86_64 that gnuradio-companion
segfaults on exit, so I don't think this is necessarily an E100 issue.

Links:

[1] mailto:USRP-users@lists.ettus.com
[2]
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

On 26 Mar 2013 09:20, Philip Balister wrote: > On 03/26/2013 09:03 AM, Xavier Clinquart wrote: > >> Hello , I am Xavier Clinquart student at the Denayer institute Belgium. And I'm currently working with the USRP E100 for my thesis . Now i have been having this segmentation fault that keeps repeating itself when i try to use the gnuradio-companion. Or when i try to minimise any other window open at that current time. I am using the latest image and build from the ettus website and have not made Any changes to it. is there anyone who had this problem and found a solution to it? > > Can you send me the output for the console when it segfaults? > > Philip > >> Greetings Xavier _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com [1] http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com [2] > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com I've observed, with the latest Gnu Radio on x86_64 that gnuradio-companion segfaults on exit, so I don't think this is necessarily an E100 issue. Links: ------ [1] mailto:USRP-users@lists.ettus.com [2] http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

MW

Macre, William R

Tue, Mar 26, 2013 2:21 PM

Xavier:

I am using the USRP E110. When you say "segmentation fault" I assume you are referring to the "S" character being blasted to the terminal while transmitting. I get this error when using tx_sample_from_file to transmit a repeated frame. I have found in my case that setting the "-delay=" option to 250ms clears the problem. Josh and Philip are aware of this problem and the fix should be in the next UHD release.

Wrm

From: USRP-users [mailto:usrp-users-bounces@lists.ettus.com] On Behalf Of Xavier Clinquart
Sent: Tuesday, March 26, 2013 9:04 AM
To: usrp-users@lists.ettus.com
Subject: [USRP-users] USRP E100 segmentation faults

Hello ,

I am Xavier Clinquart student at the Denayer institute Belgium. And I'm currently working with the USRP E100 for my thesis .
Now i have been having this segmentation fault that keeps repeating itself when i try to use the gnuradio-companion. Or when i try to minimise any other window open at that current time.

I am using the latest image and build from the ettus website and have not made Any changes to it.

is there anyone who had this problem and found a solution to it?

Greetings

Xavier

Xavier: I am using the USRP E110. When you say "segmentation fault" I assume you are referring to the "S" character being blasted to the terminal while transmitting. I get this error when using tx_sample_from_file to transmit a repeated frame. I have found in my case that setting the "-delay=" option to 250ms clears the problem. Josh and Philip are aware of this problem and the fix should be in the next UHD release. Wrm From: USRP-users [mailto:usrp-users-bounces@lists.ettus.com] On Behalf Of Xavier Clinquart Sent: Tuesday, March 26, 2013 9:04 AM To: usrp-users@lists.ettus.com Subject: [USRP-users] USRP E100 segmentation faults Hello , I am Xavier Clinquart student at the Denayer institute Belgium. And I'm currently working with the USRP E100 for my thesis . Now i have been having this segmentation fault that keeps repeating itself when i try to use the gnuradio-companion. Or when i try to minimise any other window open at that current time. I am using the latest image and build from the ettus website and have not made Any changes to it. is there anyone who had this problem and found a solution to it? Greetings Xavier

MW

Macre, William R

Tue, Mar 26, 2013 2:27 PM

Sorry:

I confused "segment number error"(USRP) with "segmentation fault"(KERNEL) both of which I have encountered during transmitting on the E110. I have not been able to reproduce the "segmentation fault" in quite awhile however.

Wrm

From: USRP-users [mailto:usrp-users-bounces@lists.ettus.com] On Behalf Of Macre, William R
Sent: Tuesday, March 26, 2013 10:22 AM
To: Xavier Clinquart; usrp-users@lists.ettus.com
Subject: Re: [USRP-users] USRP E100 segmentation faults

Xavier:

I am using the USRP E110. When you say "segmentation fault" I assume you are referring to the "S" character being blasted to the terminal while transmitting. I get this error when using tx_sample_from_file to transmit a repeated frame. I have found in my case that setting the "-delay=" option to 250ms clears the problem. Josh and Philip are aware of this problem and the fix should be in the next UHD release.

Wrm

From: USRP-users [mailto:usrp-users-bounces@lists.ettus.com] On Behalf Of Xavier Clinquart
Sent: Tuesday, March 26, 2013 9:04 AM
To: usrp-users@lists.ettus.com mailto:usrp-users@lists.ettus.com
Subject: [USRP-users] USRP E100 segmentation faults

Hello ,

I am Xavier Clinquart student at the Denayer institute Belgium. And I'm currently working with the USRP E100 for my thesis .
Now i have been having this segmentation fault that keeps repeating itself when i try to use the gnuradio-companion. Or when i try to minimise any other window open at that current time.

I am using the latest image and build from the ettus website and have not made Any changes to it.

is there anyone who had this problem and found a solution to it?

Greetings

Xavier

Sorry: I confused "segment number error"(USRP) with "segmentation fault"(KERNEL) both of which I have encountered during transmitting on the E110. I have not been able to reproduce the "segmentation fault" in quite awhile however. Wrm From: USRP-users [mailto:usrp-users-bounces@lists.ettus.com] On Behalf Of Macre, William R Sent: Tuesday, March 26, 2013 10:22 AM To: Xavier Clinquart; usrp-users@lists.ettus.com Subject: Re: [USRP-users] USRP E100 segmentation faults Xavier: I am using the USRP E110. When you say "segmentation fault" I assume you are referring to the "S" character being blasted to the terminal while transmitting. I get this error when using tx_sample_from_file to transmit a repeated frame. I have found in my case that setting the "-delay=" option to 250ms clears the problem. Josh and Philip are aware of this problem and the fix should be in the next UHD release. Wrm From: USRP-users [mailto:usrp-users-bounces@lists.ettus.com] On Behalf Of Xavier Clinquart Sent: Tuesday, March 26, 2013 9:04 AM To: usrp-users@lists.ettus.com<mailto:usrp-users@lists.ettus.com> Subject: [USRP-users] USRP E100 segmentation faults Hello , I am Xavier Clinquart student at the Denayer institute Belgium. And I'm currently working with the USRP E100 for my thesis . Now i have been having this segmentation fault that keeps repeating itself when i try to use the gnuradio-companion. Or when i try to minimise any other window open at that current time. I am using the latest image and build from the ettus website and have not made Any changes to it. is there anyone who had this problem and found a solution to it? Greetings Xavier

M

mleech@ripnet.com

Tue, Mar 26, 2013 2:33 PM

On 26 Mar 2013 10:27, Macre, William R wrote:

Sorry:

I

confused "segment number error"(USRP) with "segmentation fault"(KERNEL)
both of which I have encountered during transmitting on the E110. I have
not been able to reproduce the "segmentation fault" in quite awhile
however.

Wrm

A "Segmentation Fault" is an error that occurs when
a running process attempts to access a virtual address that is outside
its address space. Most usually because the app is either trying to
indirect through a NULL pointer (insufficient error checking of
pointer-returns from function calls) or it runs off the end of an array,
trashing an adjacent pointer, which is subsequently used, and the
garbage value is outside the virtual address space of the process.

The
kernel gets a trap from the MMU, and turns it into a SIGSEGV delivered
to the process, which then, if it hasn't "caught" SIGSEGV, causes it to
terminate, and optionally, to produce a core dump file.

This is
standard Linux stuff, and not specific to E100. Any Linux system that
runs on MMU-capable hardware works this way.

On 26 Mar 2013 10:27, Macre, William R wrote: > Sorry: > > I confused "segment number error"(USRP) with "segmentation fault"(KERNEL) both of which I have encountered during transmitting on the E110. I have not been able to reproduce the "segmentation fault" in quite awhile however. > > Wrm A "Segmentation Fault" is an error that occurs when a running process attempts to access a virtual address that is outside its address space. Most usually because the app is either trying to indirect through a NULL pointer (insufficient error checking of pointer-returns from function calls) or it runs off the end of an array, trashing an adjacent pointer, which is subsequently used, and the garbage value is outside the virtual address space of the process. The kernel gets a trap from the MMU, and turns it into a SIGSEGV delivered to the process, which then, if it hasn't "caught" SIGSEGV, causes it to terminate, and optionally, to produce a core dump file. This is standard Linux stuff, and not specific to E100. Any Linux system that runs on MMU-capable hardware works this way.