Ok thanks a lot Harris.

One last question:

Since SPDK doesn’t have multithread/multiple process support.

I try following.
Run couple of instance of fio on multiple disk in background.

But one of the fio_plugin process crashes saying:
No free hugepages reported
rte_panic("Cannot get hugepage information\n");

I do increase number of hugepages in kernel /proc/sys/vm/nr_hugepage
interface before running fio plugin.

Regards,
Oza.

-----Original Message-----
From: SPDK [mailto:spdk-bounces(a)lists.01.org] On Behalf Of Harris, James R
Sent: Thursday, April 06, 2017 12:23 AM
To: Storage Performance Development Kit
Subject: Re: [SPDK] nvme_ctrlr.c:1224:nvme_ctrlr_process_init: ***ERROR***
Initialization timed out in state 3


> On Apr 4, 2017, at 9:00 PM, Oza Oza <oza.oza(a)broadcom.com> wrote:
>
> Also, couple of more questions.
>
> 1)  right now SPDK/fio_plugin doesnt support multiple threads right ?
> let us say I want to create multiple threads to push data in order to
> utilize all the cpus, then ? because I want to scale SPDK across cpu
> to effectively utilize it.

Currently the SPDK fio plugin only supports a single thread.  One of the
engineers here at Intel is actively working on multi-thread support.

>
> 2) the posted log in my previous mail:
> 	Why probing of spdk_nvme happens 3 times ? (rather multiple times ?)
> 	probe driver: 8086:953 spdk_nvme
> is it normal ?

Yes - this is normal.  These probe messages from DPDK are a bit misleading -
we are looking at modifying these to reduce confusion.

>
> Regards,
> Oza.
> -----Original Message-----
> From: Oza Oza [mailto:oza.oza(a)broadcom.com]
> Sent: Wednesday, April 05, 2017 9:04 AM
> To: 'Storage Performance Development Kit'
> Subject: RE: [SPDK] nvme_ctrlr.c:1224:nvme_ctrlr_process_init:
> ***ERROR*** Initialization timed out in state 3
>
> Ok, what is --thread=1 ?  (it means it will create one thread to
> handle the IO ?)

—thread implements each job as a thread (using pthread_create) instead of a
separate process.



-Jim

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