Re: [PATCH 0/3] readfile(2): a new syscall to make open/read/close faster

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 14/07/2020 11:07, Miklos Szeredi wrote:
> On Tue, Jul 14, 2020 at 8:51 AM Pavel Machek <pavel@xxxxxxx> wrote:
>>
>> Hi!
>>
>>>> At first, I thought that the proposed system call is capable of
>>>> reading *multiple* small files using a single system call - which
>>>> would help increase HDD/SSD queue utilization and increase IOPS (I/O
>>>> operations per second) - but that isn't the case and the proposed
>>>> system call can read just a single file.
>>>
>>> If you want to do this for multple files, use io_ring, that's what it
>>> was designed for.  I think Jens was going to be adding support for the
>>> open/read/close pattern to it as well, after some other more pressing
>>> features/fixes were finished.
>>
>> What about... just using io_uring for single file, too? I'm pretty
>> sure it can be wrapped in a library that is simple to use, avoiding
>> need for new syscall.
> 
> Just wondering:  is there a plan to add strace support to io_uring?
> And I don't just mean the syscalls associated with io_uring, but
> tracing the ring itself.

What kind of support do you mean? io_uring is asynchronous in nature
with all intrinsic tracing/debugging/etc. problems of such APIs.
And there are a lot of handy trace points, are those not enough?

Though, this can be an interesting project to rethink how async
APIs are worked with.

> 
> I think that's quite important as io_uring becomes mainstream.

-- 
Pavel Begunkov



[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]

  Powered by Linux