Bug 825 - DPDK requires more than twice as much memory as requested
Summary: DPDK requires more than twice as much memory as requested
Status: UNCONFIRMED
Alias: None
Product: DPDK
Classification: Unclassified
Component: core (show other bugs)
Version: 18.11
Hardware: x86 Linux
: Normal normal
Target Milestone: ---
Assignee: dev
URL:
Depends on:
Blocks:
 
Reported: 2021-10-06 13:12 CEST by Anton
Modified: 2021-10-06 14:25 CEST (History)
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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);

?
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