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From: Miklos Szeredi <miklos@szeredi.hu>
To: Kirill Tkhai <ktkhai@virtuozzo.com>
Cc: kuznet@virtuozzo.com, linux-fsdevel@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/3] fuse: Solve request_find() bottleneck
Date: Mon, 24 Sep 2018 17:04:13 +0200	[thread overview]
Message-ID: <CAJfpegt60Bcmu+fHRTL-HE-Uw5rvP3Nb_yuzfpX02E9Z8ECbdg@mail.gmail.com> (raw)
In-Reply-To: <8222c235-ff07-b16b-3389-0b9780145abd@virtuozzo.com>

On Mon, Sep 24, 2018 at 2:08 PM, Kirill Tkhai <ktkhai@virtuozzo.com> wrote:
> 2 weeks passed, so ping.
>
> Miklos, any reaction on this?
>
> Thanks,
> Kirill
>
> On 11.09.2018 13:11, Kirill Tkhai wrote:
>> Hi,
>>
>> We noticed the performance bottle neck in FUSE running our
>> Virtuozzo storage over rdma. On some types of workload
>> we observe 20% of time spent in request_find() in profiler.
>> This function is iterating over long list of requests, and it
>> scales bad.
>>
>> The patch introduces hash table to reduce the number
>> of iterations, we do in this function. Also, algorithm
>> of generating IDs for interrupt requests is changed,
>> simplified request_find() function and killed
>> fuse_req::intr_unique field.

Concept looks good.  Will review details...

Thanks,
Miklos

      reply	other threads:[~2018-09-24 21:06 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-11 10:11 [PATCH 0/3] fuse: Solve request_find() bottleneck Kirill Tkhai
2018-09-11 10:11 ` [PATCH 1/3] fuse: Change interrupt requests allocation algorhythm Kirill Tkhai
2018-09-11 10:12 ` [PATCH 2/3] fuse: Kill fuse_req::intr_unique Kirill Tkhai
2018-09-11 10:12 ` [PATCH 3/3] fuse: Use hash table to link processing request Kirill Tkhai
2018-09-25  9:08   ` Miklos Szeredi
2018-09-25  9:35     ` Kirill Tkhai
2018-09-24 12:08 ` [PATCH 0/3] fuse: Solve request_find() bottleneck Kirill Tkhai
2018-09-24 15:04   ` Miklos Szeredi [this message]

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