[lttng-dev] 回复:Re: 回复:Re: Pros and Cons of LTTng

[Mathieu Desnoyers]

Hi, 

The current LTTng kernel tracer (lttng-modules) supports Linux 3.0+ only. 

If you only need to trace user-space, you might be able to use lttng-tools and lttng-ust 
on an older kernel. Please refer to the README.md files of each project for information 
about their environment prerequisites. 

The RHEL6 kernel variant based on 2.6.32-2.6.35 Linux kernels has never been supported by 
the LTTng 2.x kernel tracers without kernel patching. 

Thanks, 

Mathieu 

----- On Jul 29, 2019, at 8:34 PM, 杨海 <hai.yang at magic-shield.com> wrote: 

> Hi Mathieu,
> Thanks. I am looking for packages for older distributions like CentOS 6 (with
> kernel 2.6) but could not find it. And which kernel version is minimum
> requirement for LTTng?

> Regards
> Hai

> ------------------ Original ------------------
> From: "Mathieu Desnoyers"<mathieu.desnoyers at efficios.com>;
> Date: Thu, Jul 25, 2019 11:48 PM
> To: "杨海"<hai.yang at magic-shield.com>;
> Cc: "Jonathan Rajotte"<jonathan.rajotte-julien at efficios.com>;
> "lttng-dev"<lttng-dev at lists.lttng.org>;
> Subject: Re: [lttng-dev] 回复:Re: 回复:Re: Pros and Cons of LTTng
> ----- On Jul 25, 2019, at 4:21 PM, 杨海 <hai.yang at magic-shield.com> wrote:

>> Hi

>> Thanks for quick response.
>> LTTng is really impressive on performance，especially under heavy workload. When
>> using it on critical machines，stability is also essential.
>> I wonder how LTTng is commercialized and any products or OS distributions
>> already enabled it.
>> I took a look at lttng-modules bug list，there are a few kernel oops years ago
>> and got resolved. May I say it is very stable or it has not been fully tested?

> Hi,

> EfficiOS has had commercial customers using LTTng in production for many years
> now.
> LTTng per-se is distributed as packages in all major Linux distributions.
> EfficiOS also provides
> more up-to-date packages for some distributions through [
> http://packages.efficios.com/ | http://packages.efficios.com/ ]

> The way we commercialize LTTng is through funding for design and implementation
> of
> customer's feature requests. We also provide commercial support tailored to
> specific
> customer's environments, which includes SLA and continuous integration testing
> of specific
> environments.

> If those are services you are interested in, please feel free to contact us in
> private so we
> can further discuss your needs.

> Best regards,

> Mathieu

>> regards
>> Hai

>> --------------原始邮件--------------
>> 发件人："Jonathan Rajotte-Julien "<jonathan.rajotte-julien at efficios.com>;
>> 发送时间：2019年7月23日(星期二) 上午6:20
>> 收件人："杨海" <hai.yang at magic-shield.com>;
>> 抄送："lttng-dev "<lttng-dev at lists.lttng.org>;
>> 主题：Re: 回复:Re: [lttng-dev] Pros and Cons of LTTng
>> -----------------------------------
>> Hi,

>>> As to LD_PRELOAD, it is also used for privilege escalation. Will it be regarded
>> > as vulnerability and forbidden on some Linux systems?

>> It could yes.
>> In that case you will be limited to the syscalls interface for the libc
>> observability unless you instrument it and distribute it.

>> Cheers.

>> _______________________________________________
>> lttng-dev mailing list
>> lttng-dev at lists.lttng.org
>> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev

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

-- 
Mathieu Desnoyers 
EfficiOS Inc. 
http://www.efficios.com 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.lttng.org/pipermail/lttng-dev/attachments/20190730/8f33efe5/attachment-0001.html>