Bug 825

Summary:	DPDK requires more than twice as much memory as requested
Product:	DPDK	Reporter:	Anton (maaaah)
Component:	core	Assignee:	dev
Status:	UNCONFIRMED ---
Severity:	normal
Priority:	Normal
Version:	18.11
Target Milestone:	---
Hardware:	x86
OS:	Linux

Description Anton 2021-10-06 13:12:27 CEST

I am trying to allocate 32Gb memory via rte_calloc applying config changes advised in https://bugs.dpdk.org/show_bug.cgi?id=608. I am using 1Gb hugepages. However, in order to success, the system requires to reserve 66 pages which is too much - we just don't have enough RAM on our production hosts.

Please advise.

Comment 1 Anton 2021-10-06 14:25:04 CEST

Btw if its by design or difficult to fix could you please tell if I can use other methods to allocate? Say, directly mmap hugepage via something like:

mmap(NULL, memory_size_, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB, -1, 0);

?