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boundary="===============2254588232837230054==" Errors-To: lttng-dev-bounces@lists.lttng.org Sender: "lttng-dev" --===============2254588232837230054== Content-Language: en-GB Content-Type: multipart/related; boundary="_004_AM0PR06MB4003ABBC57B6E974B89D4C65E64B0AM0PR06MB4003eurp_"; type="multipart/alternative" --_004_AM0PR06MB4003ABBC57B6E974B89D4C65E64B0AM0PR06MB4003eurp_ Content-Type: multipart/alternative; boundary="_000_AM0PR06MB4003ABBC57B6E974B89D4C65E64B0AM0PR06MB4003eurp_" --_000_AM0PR06MB4003ABBC57B6E974B89D4C65E64B0AM0PR06MB4003eurp_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Hi Jonathan, I was indeed missing the /dev/shm mountpoint. After creating it everything = now works as expected. Thanks! Regards Moritz Pflanzer Software Development Engineer [cid:image001.png@01D3BF6E.185110B0] R=E4ffelstrasse 28 8045 Z=FCrich E: moritz.pflanzer@hexagon.com W: http://www.hexagongeosystems.com ________________________________ From: Jonathan Rajotte-Julien Sent: 04 August 2020 15:09 To: PFLANZER Moritz Cc: lttng-dev@lists.lttng.org Subject: Re: [lttng-dev] Help needed: No UST events recorded This email is not from Hexagon=92s Office 365 instance. Please be careful w= hile clicking links, opening attachments, or replying to this email. Hi Moritz, >From the lttng-sessiond log: PERROR - 08:04:45.465478146 [575/575]: Failed to open wait shm at /lttng-us= t-wait-8: Function not implemented (in get_wait_shm() at shm.c:98) DEBUG1 - 08:04:45.465496345 [575/575]: Failing to get the wait shm fd (in g= et_wait_shm() at shm.c:143) Error: Failed to notify applications or create the wait shared memory. Execution continues but there might be problems for already running applications that wishes to register. On the app side we see that the app never register: libust[694/694]: Error: Error opening shm /lttng-ust-wait-8-0 (in get_wait_= shm() at lttng-ust-comm.c:1241) libust[694/694]: Warning: Unable to get map shm for local apps. Disabling L= TTng-UST per-user tracing. (in setup_local_apps() at lttng-ust-comm.c:523) Does the /dev/shm mount point exist? Does your kernel support shared memory/tmpfs? Cheers On Tue, Aug 04, 2020 at 08:15:08AM +0000, PFLANZER Moritz wrote: > Hi Jonathan, > > Apologies that I forgot to mention which version of LTTng I'm using. I di= dn't build from master but downloaded the latest release archives for LTTng= 2.12 "(Ta) Meilleure". "lttng --version" reports a corresponding "lttng (L= TTng Trace Control) 2.12.1 - (Ta) Meilleure" > > Please find the console log here: https://eur02.safelinks.protection.outl= ook.com/?url=3Dhttps%3A%2F%2Fpastebin.com%2FPVzqrPvr&data=3D02%7C01%7C%= 7C9bc88da99a1646d66d4408d83877ab9f%7C1b16ab3eb8f64fe39f3e2db7fe549f6a%7C0%7= C0%7C637321433923510073&sdata=3DkpJmnfbLdWJXCElVkR7tcdSuVy%2FLeeZw9xaLn= I3mHXY%3D&reserved=3D0 > and the lttng-sessiond.log here: https://eur02.safelinks.protection.outlo= ok.com/?url=3Dhttps%3A%2F%2Fpastebin.com%2Fg3aXAcQg&data=3D02%7C01%7C%7= C9bc88da99a1646d66d4408d83877ab9f%7C1b16ab3eb8f64fe39f3e2db7fe549f6a%7C0%7C= 0%7C637321433923520068&sdata=3DhN4mc9XXz%2FBQQSm0NpjS94CHDanmESE6n9Jn5T= 4TVDQ%3D&reserved=3D0 > > Thanks, > Moritz > > > > Moritz Pflanzer > Software Development Engineer > > [cid:image001.png@01D3BF6E.185110B0] > > R=E4ffelstrasse 28 > > 8045 Z=FCrich > E: moritz.pflanzer@hexagon.com > W: http://www.hexagongeosystems.com/ > > ________________________________ > From: Jonathan Rajotte-Julien > Sent: 03 August 2020 17:31 > To: PFLANZER Moritz > Cc: lttng-dev@lists.lttng.org > Subject: Re: [lttng-dev] Help needed: No UST events recorded > > This email is not from Hexagon=92s Office 365 instance. Please be careful= while clicking links, opening attachments, or replying to this email. > > > Hi Moritz > > What is your version of lttng-tools? > > lttng --version > > Please run the `hello` executable using the LTTNG_UST_DEBUG env variable,= while > tracing, and provide the output. > > pkill lttng-sessiond > lttng-sessiond -b -vvv --verbose-consumer 2> /tmp/lttng-sessiond.log > lttng create > lttng enable-event -u -a > lttng start > LTTNG_UST_DEBUG=3Dy ./hello > lttng stop > lttng destroy > pkill lttng-sessiond > > Please also provide the /tmp/lttng-sessiond.log file via pastebin. > > I suspect that if you cross-compiled lttng-ust from the master branch tha= t > lttng-tools is not using the same version, resulting in the application n= ot > being able to register to the lttng-sessiond. > > Cheers > > On Mon, Aug 03, 2020 at 09:35:25AM +0000, PFLANZER Moritz via lttng-dev w= rote: > > Hi all! > > > > I'm struggling to get userspace tracing working on an aarch64 platform = (busybox on top of Linux 5.4.24 kernel). I followed the guidelines in the d= ocs and am currently using this example program for testing: https://eur02.= safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fgithub.com%2Flttng%2F= lttng-ust%2Ftree%2Fmaster%2Fdoc%2Fexamples%2Fhello-static-lib&data=3D02= %7C01%7C%7C9bc88da99a1646d66d4408d83877ab9f%7C1b16ab3eb8f64fe39f3e2db7fe549= f6a%7C0%7C0%7C637321433923520068&sdata=3DnbgcpqyriJ1kERRFLum2sH91yXi28h= hfeN9lQ3OyfOc%3D&reserved=3D0 > > I cross-compiled lttng-ust and that example, but when I run the followi= ng commands on the platform no traces are recorded. If I use the same examp= le on my x86 machine everything works as expected. (And kernelspace tracing= is working on that aarch64 system.) > > > > Any hints where I could start investigating the issue are welcome. > > > > Regards, > > Moritz > > > > ~ # pwd > > /root > > ~ # lttng create > > Spawning a session daemon > > Session auto-20200720-174509 created. > > Traces will be written in /root/lttng-traces/auto-20200720-174509 > > ~ # lttng enable-event -au > > All UST events are enabled in channel channel0 > > ~ # lttng start > > Tracing started for session auto-20200720-174509 > > ~ # ./hello > > Hello, World! > > Tracing... done. > > ~ # lttng destroy > > Session auto-20200720-174509 destroyed > > ~ # ll > > total 40 > > -rwxr-xr-x 1 root root 39280 Jul 20 17:44 hello* > > > > > > > > Moritz Pflanzer > > Software Development Engineer > > > > [cid:image001.png@01D3BF6E.185110B0] > > > > R=E4ffelstrasse 28 > > > > 8045 Z=FCrich > > E: moritz.pflanzer@hexagon.com > > W: http://www.hexagongeosystems.com/ > > > > > _______________________________________________ > > lttng-dev mailing list > > lttng-dev@lists.lttng.org > > https://eur02.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Flis= ts.lttng.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Flttng-dev&data=3D02%7C01%= 7C%7C9bc88da99a1646d66d4408d83877ab9f%7C1b16ab3eb8f64fe39f3e2db7fe549f6a%7C= 0%7C0%7C637321433923520068&sdata=3Dci4daouTRyY%2BWzSjqVhrmjn11lhYHKs6lc= R6kvqr370%3D&reserved=3D0 > > > -- > Jonathan Rajotte-Julien > EfficiOS -- Jonathan Rajotte-Julien EfficiOS --_000_AM0PR06MB4003ABBC57B6E974B89D4C65E64B0AM0PR06MB4003eurp_ Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Hi Jonathan,

I was indeed missing the /dev/shm mountpoint. After creating it everything = now works as expected. Thanks!

Regards



= Moritz Pflanzer
Software Development Engineer

3D"cid:image001.png@01D3BF6E.185110B0"


R=E4ffelstrasse 28

8045 Z=FCrich
E: moritz.pflanzer@hexagon.com
W: http://www.hexagongeosystems.com

From: Jonathan Rajotte-Juli= en <jonathan.rajotte-julien@efficios.com>
Sent: 04 August 2020 15:09
To: PFLANZER Moritz <moritz.pflanzer@hexagon.com>
Cc: lttng-dev@lists.lttng.org <lttng-dev@lists.lttng.org>
Subject: Re: [lttng-dev] Help needed: No UST events recorded
 
This email is not from Hexagon=92s Office 365 inst= ance. Please be careful while clicking links, opening attachments, or reply= ing to this email.


Hi Moritz,

>From the lttng-sessiond log:

PERROR - 08:04:45.465478146 [575/575]: Failed to open wait shm at /lttng-us= t-wait-8: Function not implemented (in get_wait_shm() at shm.c:98)
DEBUG1 - 08:04:45.465496345 [575/575]: Failing to get the wait shm fd (in g= et_wait_shm() at shm.c:143)
Error: Failed to notify applications or create the wait shared memory.
Execution continues but there might be problems for already
running applications that wishes to register.

On the app side we see that the app never register:

libust[694/694]: Error: Error opening shm /lttng-ust-wait-8-0 (in get_wait_= shm() at lttng-ust-comm.c:1241)
libust[694/694]: Warning: Unable to get map shm for local apps. Disabling L= TTng-UST per-user tracing. (in setup_local_apps() at lttng-ust-comm.c:523)<= br>

Does the /dev/shm mount point exist?
Does your kernel support shared memory/tmpfs?

Cheers

On Tue, Aug 04, 2020 at 08:15:08AM +0000, PFLANZER Moritz wrote:
> Hi Jonathan,
>
> Apologies that I forgot to mention which version of LTTng I'm using. I= didn't build from master but downloaded the latest release archives for LT= Tng 2.12 "(Ta) Meilleure". "lttng --version" reports a = corresponding "lttng (LTTng Trace Control) 2.12.1 - (Ta) Meilleure"
>
> Please find the console log here: https://eur02.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fpastebi= n.com%2FPVzqrPvr&amp;data=3D02%7C01%7C%7C9bc88da99a1646d66d4408d83877ab= 9f%7C1b16ab3eb8f64fe39f3e2db7fe549f6a%7C0%7C0%7C637321433923510073&amp;= sdata=3DkpJmnfbLdWJXCElVkR7tcdSuVy%2FLeeZw9xaLnI3mHXY%3D&amp;reserved= =3D0
> and the lttng-sessiond.log here: https://eur02.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fpastebi= n.com%2Fg3aXAcQg&amp;data=3D02%7C01%7C%7C9bc88da99a1646d66d4408d83877ab= 9f%7C1b16ab3eb8f64fe39f3e2db7fe549f6a%7C0%7C0%7C637321433923520068&amp;= sdata=3DhN4mc9XXz%2FBQQSm0NpjS94CHDanmESE6n9Jn5T4TVDQ%3D&amp;reserved= =3D0
>
> Thanks,
> Moritz
>
>
>
> Moritz Pflanzer
> Software Development Engineer
>
> [cid:image001.png@01D3BF6E.185110B0]
>
> R=E4ffelstrasse 28
>
> 8045 Z=FCrich
> E: moritz.pflanzer@hexagon.com<mailto:moritz.pflanzer@hexagon.com&g= t;<mailto:carolin.siebert@hexagon.com>
> W: http://www.hexagongeo= systems.com/
>
> ________________________________
> From: Jonathan Rajotte-Julien <jonathan.rajotte-julien@efficios.com= >
> Sent: 03 August 2020 17:31
> To: PFLANZER Moritz <moritz.pflanzer@hexagon.com>
> Cc: lttng-dev@lists.lttng.org <lttng-dev@lists.lttng.org>
> Subject: Re: [lttng-dev] Help needed: No UST events recorded
>
> This email is not from Hexagon=92s Office 365 instance. Please be care= ful while clicking links, opening attachments, or replying to this email. >
>
> Hi Moritz
>
> What is your version of lttng-tools?
>
>   lttng --version
>
> Please run the `hello` executable using the LTTNG_UST_DEBUG env variab= le, while
> tracing, and provide the output.
>
>   pkill lttng-sessiond
>   lttng-sessiond -b -vvv --verbose-consumer 2> /tmp/lttng= -sessiond.log
>   lttng create
>   lttng enable-event -u -a
>   lttng start
>   LTTNG_UST_DEBUG=3Dy ./hello
>   lttng stop
>   lttng destroy
>   pkill lttng-sessiond
>
> Please also provide the /tmp/lttng-sessiond.log file via pastebin.
>
> I suspect that if you cross-compiled lttng-ust from the master branch = that
> lttng-tools is not using the same version, resulting in the applicatio= n not
> being able to register to the lttng-sessiond.
>
> Cheers
>
> On Mon, Aug 03, 2020 at 09:35:25AM +0000, PFLANZER Moritz via lttng-de= v wrote:
> > Hi all!
> >
> > I'm struggling to get userspace tracing working on an aarch64 pla= tform (busybox on top of Linux 5.4.24 kernel). I followed the guidelines in= the docs and am currently using this example program for testing: https://eur02.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fgithub.= com%2Flttng%2Flttng-ust%2Ftree%2Fmaster%2Fdoc%2Fexamples%2Fhello-static-lib= &amp;data=3D02%7C01%7C%7C9bc88da99a1646d66d4408d83877ab9f%7C1b16ab3eb8f= 64fe39f3e2db7fe549f6a%7C0%7C0%7C637321433923520068&amp;sdata=3Dnbgcpqyr= iJ1kERRFLum2sH91yXi28hhfeN9lQ3OyfOc%3D&amp;reserved=3D0
> > I cross-compiled lttng-ust and that example, but when I run the f= ollowing commands on the platform no traces are recorded. If I use the same= example on my x86 machine everything works as expected. (And kernelspace t= racing is working on that aarch64 system.)
> >
> > Any hints where I could start investigating the issue are welcome= .
> >
> > Regards,
> > Moritz
> >
> > ~ # pwd
> > /root
> > ~ # lttng create
> > Spawning a session daemon
> > Session auto-20200720-174509 created.
> > Traces will be written in /root/lttng-traces/auto-20200720-174509=
> > ~ # lttng enable-event -au
> > All UST events are enabled in channel channel0
> > ~ # lttng start
> > Tracing started for session auto-20200720-174509
> > ~ # ./hello
> > Hello, World!
> > Tracing...  done.
> > ~ # lttng destroy
> > Session auto-20200720-174509 destroyed
> > ~ # ll
> > total 40
> > -rwxr-xr-x    1 root     root&= nbsp;        39280 Jul 20 17:44 hello* > >
> >
> >
> > Moritz Pflanzer
> > Software Development Engineer
> >
> > [cid:image001.png@01D3BF6E.185110B0]
> >
> > R=E4ffelstrasse 28
> >
> > 8045 Z=FCrich
> > E: moritz.pflanzer@hexagon.com<mailto:moritz.pflanzer@hexagon.= com><mailto:carolin.siebert@hexagon.com>
> > W: http://www.hexag= ongeosystems.com/
>
>
>
> > _______________________________________________
> > lttng-dev mailing list
> > lttng-dev@lists.lttng.org
> > https://eur02.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Flists.l= ttng.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Flttng-dev&amp;data=3D02%7C01%= 7C%7C9bc88da99a1646d66d4408d83877ab9f%7C1b16ab3eb8f64fe39f3e2db7fe549f6a%7C= 0%7C0%7C637321433923520068&amp;sdata=3Dci4daouTRyY%2BWzSjqVhrmjn11lhYHK= s6lcR6kvqr370%3D&amp;reserved=3D0
>
>
> --
> Jonathan Rajotte-Julien
> EfficiOS



--
Jonathan Rajotte-Julien
EfficiOS
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