Bug 872

Summary:	rte_malloc() failed with dynamic memory mode
Product:	DPDK	Reporter:	li_hong.bi
Component:	core	Assignee:	dev
Status:	UNCONFIRMED ---
Severity:	critical	CC:	anatoly.burakov, david.marchand
Priority:	High
Version:	20.11
Target Milestone:	---
Hardware:	x86
OS:	Linux

Description li_hong.bi 2021-11-01 07:02:14 CET

We have one primary dpdk process and 4 secondary processes, and 4 secondary processes will call rte_malloc() to allocate some memory and call rte_free() to release memory after process something.
1. if dpdk memory mode is dynamic, rte_malloc() failed will occur and 'EAL: Request timed out' log was printed out.
2. if dpdk memory mode is legacy, it is normal without any issue.

Note: from current investigation, when this issue occurred, the new hugepage block was reserved and released from/to system.

Comment 1 li_hong.bi 2021-11-01 08:17:30 CET

Do you help to check what causes this issue ? 
or, there is any limitation from dpdk for this use case.
thank u.

Comment 2 David Marchand 2021-11-12 08:58:44 CET

This log means that the secondary sent a request for more memory to the primary process, but did not get a reply in the expected time window.

I suggest enabling logs on both processes and check if and how the request is handled by the primary process.