From: Leon Romanovsky <leon@kernel.org>
To: Junxian Huang <huangjunxian6@hisilicon.com>
Cc: linux-rdma <linux-rdma@vger.kernel.org>,
Jason Gunthorpe <jgg@ziepe.ca>,
ynachum@amazon.com, Linuxarm <linuxarm@huawei.com>,
Chengchang Tang <tangchengchang@huawei.com>,
wenglianfa <wenglianfa@huawei.com>
Subject: Re: Why is the DENABLE_LTTNG compiler option in rdma-core disabled by default?
Date: Thu, 14 Nov 2024 13:41:41 +0200 [thread overview]
Message-ID: <20241114114141.GE499069@unreal> (raw)
In-Reply-To: <8fe49262-98cf-6b43-4f55-b09a8ae449ca@hisilicon.com>
On Thu, Nov 14, 2024 at 02:57:21PM +0800, Junxian Huang wrote:
> Hi all!
>
> We've been working on LTTng tracing for hns userspace provider
> recently, and we wonder why the DENABLE_LTTNG compiler option
> in rdma-core is disabled by default.
>
> If it's due to the concern about performance degradation, we have
> tested it on hns and found no significant performance difference
> when the tracepoints are disabled.
>
> Or is it because it introduces additional compilation dependency
> on LTTng library?
Yes, this is the reason. Most rdma-core users who use release version
will never need trace library in their life. They don't need an extra
dependency.
Thanks
>
> Thanks,
> Junxian
prev parent reply other threads:[~2024-11-14 11:41 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-14 6:57 Why is the DENABLE_LTTNG compiler option in rdma-core disabled by default? Junxian Huang
2024-11-14 11:41 ` Leon Romanovsky [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20241114114141.GE499069@unreal \
--to=leon@kernel.org \
--cc=huangjunxian6@hisilicon.com \
--cc=jgg@ziepe.ca \
--cc=linux-rdma@vger.kernel.org \
--cc=linuxarm@huawei.com \
--cc=tangchengchang@huawei.com \
--cc=wenglianfa@huawei.com \
--cc=ynachum@amazon.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox