* [dpdk-users] Memory allocation in dpdk
@ 2018-10-23 8:44 Avinash Chaurasia
2018-10-23 15:28 ` Wiles, Keith
0 siblings, 1 reply; 2+ messages in thread
From: Avinash Chaurasia @ 2018-10-23 8:44 UTC (permalink / raw)
To: users
Hello,
I am trying to understand how dpdk allocate memory. I tried digging code to
understand memory allocation of DPDK. So far I understood that memory is
allocated from a heap that dpdk maintains. However, this heap must be
allocated at some place. I failed to traceback any function (called from
heap_alloc()) that calls mmap to allocate memory. Please let me know when
this heap is created, which function call does that.
Thanks
Avinash Kumar Chaurasia
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [dpdk-users] Memory allocation in dpdk
2018-10-23 8:44 [dpdk-users] Memory allocation in dpdk Avinash Chaurasia
@ 2018-10-23 15:28 ` Wiles, Keith
0 siblings, 0 replies; 2+ messages in thread
From: Wiles, Keith @ 2018-10-23 15:28 UTC (permalink / raw)
To: Avinash Chaurasia; +Cc: users, Burakov, Anatoly
> On Oct 23, 2018, at 1:44 AM, Avinash Chaurasia <avinash.aviank2003@gmail.com> wrote:
>
> Hello,
> I am trying to understand how dpdk allocate memory. I tried digging code to
> understand memory allocation of DPDK. So far I understood that memory is
> allocated from a heap that dpdk maintains. However, this heap must be
> allocated at some place. I failed to traceback any function (called from
> heap_alloc()) that calls mmap to allocate memory. Please let me know when
> this heap is created, which function call does that.
Memory allocation is tricky in DPDK, but are you talking about rte_malloc or rte_mempool allocagtion. Each h has a different way to get memory. Look at the rte_memzone code it does the lowest level allocation of memory and use huge pages. Also look at the email list for patches submitted by Anatoly Burakov he just re-wrote the memory system and has some good explanations in the patches an in the docs for DPDK.
> Thanks
> Avinash Kumar Chaurasia
Regards,
Keith
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