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Mon, 18 Jul 2022 11:58:56 -0400 (EDT) Received: from mail.efficios.com ([127.0.0.1]) by localhost (mail03.efficios.com [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id V7nAD4MnFrt0; Mon, 18 Jul 2022 11:58:56 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mail.efficios.com (Postfix) with ESMTP id 51918424321; Mon, 18 Jul 2022 11:58:56 -0400 (EDT) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.efficios.com 51918424321 X-Virus-Scanned: amavisd-new at efficios.com Received: from mail.efficios.com ([127.0.0.1]) by localhost (mail03.efficios.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id QHyBsDoqdirU; Mon, 18 Jul 2022 11:58:56 -0400 (EDT) Received: from mail03.efficios.com (mail03.efficios.com [167.114.26.124]) by mail.efficios.com (Postfix) with ESMTP id 421FB42431D; Mon, 18 Jul 2022 11:58:56 -0400 (EDT) Date: Mon, 18 Jul 2022 11:58:56 -0400 (EDT) To: Pennese Marco Cc: lttng-dev Message-ID: <1511510448.72040.1658159936177.JavaMail.zimbra@efficios.com> In-Reply-To: References: MIME-Version: 1.0 X-Originating-IP: [167.114.26.124] X-Mailer: Zimbra 8.8.15_GA_4304 (ZimbraWebClient - FF100 (Linux)/8.8.15_GA_4304) Thread-Topic: LTTng on RHEL 7.9 with real time kernel patch Thread-Index: AdiYTTrdh6Eu3U95S9aYfchNDPwHdakFTwyO Subject: Re: [lttng-dev] LTTng on RHEL 7.9 with real time kernel patch X-BeenThere: lttng-dev@lists.lttng.org X-Mailman-Version: 2.1.39 Precedence: list List-Id: LTTng development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Mathieu Desnoyers via lttng-dev Reply-To: Mathieu Desnoyers Content-Type: multipart/mixed; boundary="===============3710285673505283581==" Errors-To: lttng-dev-bounces@lists.lttng.org Sender: "lttng-dev" --===============3710285673505283581== Content-Type: multipart/alternative; boundary="=_c216f0a7-9969-4104-82c3-e98183e6f551" --=_c216f0a7-9969-4104-82c3-e98183e6f551 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable ----- On Jul 15, 2022, at 9:19 AM, Pennese Marco via lttng-dev wrote:=20 > Hi, > I=E2=80=99m trying to use LTTng on a Red Hat Enterprise Linux 7.9 (with t= he real time > kernel patch). > I installed LTTng on the machine following the EfficiOS guide linked by l= ttng > official website. > In my configuration, lttng manages to record user space events. > I=E2=80=99d like to record also kernel space events, so I=E2=80=99m follo= wing the quickstart > guide on the website. > As soon as I run =E2=80=9C lttng list =E2=80=93-kernel=E2=80=9D , I obtai= n the error: > Error: Unable to list kernel events: Kernel tracer not available > Error: Command error > If I repeat the procedure on a machine without the real time kernel patch= , it > works as it should. > The real time kernel I=E2=80=99m using is the following > 3.10.0-1160.62.1.rt56.1203.el7.x86_64 > Do you think the error is due to the real time patch? Can LTTng work with= a real > time kernel? > Do I need to follow a different procedure for installing LTTng on a RHEL = 7.9 > real time machine? Hi Marco,=20 Specific packaging needs around RHEL 7, including the real-time variant, ar= e part of=20 EfficiOS packaging, support and feature development services, which allow u= s to=20 develop and maintain the entire LTTng open source ecosystem. Please contact= us=20 in private to discuss the available options.=20 Thanks for reaching out!=20 Mathieu=20 > Thank you, > Marco > Il presente messaggio e-mail e ogni suo allegato devono intendersi indiri= zzati > esclusivamente al destinatario indicato e considerarsi dal contenuto > strettamente riservato e confidenziale. Se non siete l'effettivo destinat= ario o > avete ricevuto il messaggio e-mail per errore, siete pregati di avvertire > immediatamente il mittente e di cancellare il suddetto messaggio e ogni s= uo > allegato dal vostro sistema informatico. Qualsiasi utilizzo, diffusione, = copia > o archiviazione del presente messaggio da parte di chi non ne =C3=A8 il d= estinatario > =C3=A8 strettamente proibito e pu=C3=B2 dar luogo a responsabilit=C3=A0 d= i carattere civile e > penale punibili ai sensi di legge. > Questa e-mail ha valore legale solo se firmata digitalmente ai sensi dell= a > normativa vigente. > The contents of this email message and any attachments are intended solel= y for > the addressee(s) and contain confidential and/or privileged information. > If you are not the intended recipient of this message, or if this message= has > been addressed to you in error, please immediately notify the sender and = then > delete this message and any attachments from your system. If you are not = the > intended recipient, you are hereby notified that any use, dissemination, > copying, or storage of this message or its attachments is strictly prohib= ited. > Unauthorized disclosure and/or use of information contained in this email > message may result in civil and criminal liability. =E2=80=9C > This e-mail has legal value according to the applicable laws only if it i= s > digitally signed by the sender > _______________________________________________ > lttng-dev mailing list > lttng-dev@lists.lttng.org > https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev --=20 Mathieu Desnoyers=20 EfficiOS Inc.=20 http://www.efficios.com=20 --=_c216f0a7-9969-4104-82c3-e98183e6f551 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
----- On Jul 15, 2022, at 9:19 AM, Pennese Marco via lttng-dev <lttn= g-dev@lists.lttng.org> wrote:

Hi,

 

I=E2=80=99m trying to use LTTng= on a Red Hat Enterprise Linux 7.9 (with the real time kernel patch).

I installed LTTng on the machin= e following the EfficiOS guide linked by lttng official website.

In my configuration, lttng mana= ges to record user space events.

I=E2=80=99d like to record also= kernel space events, so I=E2=80=99m following the quickstart guide on the = website.

As soon as=
 I run=E2=80=
=9Clttng list =E2=80=93-kernel=E2=80=9D, I obtain the error:
Error: Unable to list k=
ernel events: Kernel tracer not available
Error: Command error

If I repeat the procedure on a = machine without the real time kernel patch, it works as it should.

The real time kernel I=E2=80=99= m using is the following

3.10.0-1160.62.1.rt56.1203.el7.= x86_64

Do you think the error is due t= o the real time patch? Can LTTng work with a real time kernel?

Do I need to follow a different= procedure for installing LTTng on a RHEL 7.9 real time machine?

=

Hi Marco,

Specific packaging needs aroun= d RHEL 7, including the real-time variant, are part of
EfficiOS p= ackaging, support and feature development services, which allow us to
=
develop and maintain the entire LTTng open source ecosystem. Please co= ntact us
in private to discuss the available options.

Thanks for reac= hing out!

Mathieu

<= /div>

Thank you,

Marco


Il presente messaggio e-mail= e ogni suo allegato devono intendersi indirizzati esclusivamente al destin= atario indicato e considerarsi dal contenuto strettamente riservato e confi= denziale. Se non siete l'effettivo destinatario o avete ricevuto il messaggio e-mail per errore, siete pregati di avvertir= e immediatamente il mittente e di cancellare il suddetto messaggio e ogni s= uo allegato dal vostro sistema informatico. Qualsiasi utilizzo, diffusione,= copia o archiviazione del presente messaggio da parte di chi non ne =C3=A8 il destinatario =C3=A8 strettament= e proibito e pu=C3=B2 dar luogo a responsabilit=C3=A0 di carattere civile e= penale punibili ai sensi di legge.
Questa e-mail ha valore legale solo se firmata digitalmente ai sensi della = normativa vigente.
The contents of this email message and any attachments are intended solely = for the addressee(s) and contain confidential and/or privileged information= .
If you are not the intended recipient of this message, or if this message h= as been addressed to you in error, please immediately notify the sender and= then delete this message and any attachments from your system. If you are = not the intended recipient, you are hereby notified that any use, dissemination, copying, or storage of th= is message or its attachments is strictly prohibited. Unauthorized disclosu= re and/or use of information contained in this email message may result in = civil and criminal liability. =E2=80=9C
This e-mail has legal value according to the applicable laws only if it is = digitally signed by the sender
_______________________________________________
lttng-dev mailing li= st
lttng-dev@lists.lttng.org
https://lists.lttng.org/cgi-bin/mailman/= listinfo/lttng-dev

--
Mathieu Desnoyers
EfficiOS Inc.
http= ://www.efficios.com
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