[wishes/any Bug 1905] Reduce memory footprint by using rte_max_lcore instead of RTE_MAX_LCORE

bugzilla at dpdk.org bugzilla at dpdk.org
Fri Mar 20 12:13:28 CET 2026


http://bugs.dpdk.org/show_bug.cgi?id=1905

            Bug ID: 1905
           Summary: Reduce memory footprint by using rte_max_lcore instead
                    of RTE_MAX_LCORE
           Product: wishes
           Version: unspecified
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: any
          Assignee: dev at dpdk.org
          Reporter: mb at smartsharesystems.com
  Target Milestone: ---
             Group: wishes-managers

Goal:
Reduce memory footprint of DPDK applications

Means:
Many arrays are sized to RTE_MAX_LCORE, which is set at build time.
This affects the memory footprint when RTE_MAX_LCORE is significantly higher
than the number of lcores used by the application.

Let's introduce an application startup-time configuration variable,
rte_max_lcore, to serve the same purposes RTE_MAX_LCORE does today.
It should be an optional EAL parameter, using RTE_MAX_LCORE as default.

By rightsizing the arrays scaling with the number of lcores, the application
memory footprint would be reduced, and allow building DPDK with a huge
RTE_MAX_LCORE.

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