Re: [PATCH v11 7/7] eal: keep per-lcore power intrinsics state in lcore variable

[Stephen Hemminger <stephen@networkplumber.org>]

On Mon, 14 Oct 2024 09:43:48 +0200
Mattias Rönnblom <mattias.ronnblom@ericsson.com> wrote:

> Keep per-lcore power intrinsics state in a lcore variable to reduce
> cache working set size and avoid any CPU next-line-prefetching causing
> false sharing.
> 
> Signed-off-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
> Acked-by: Morten Brørup <mb@smartsharesystems.com>
> Acked-by: Konstantin Ananyev <konstantin.ananyev@huawei.com>
> Acked-by: Chengwen Feng <fengchengwen@huawei.com>
> Acked-by: Stephen Hemminger <stephen@networkplumber.org>

This looks like a problem.

-------------------------------BEGIN LOGS----------------------------
####################################################################################
#### [Begin job log] "ubuntu-22.04-clang-asan+doc+tests" at step Build and test
####################################################################################
+ configure_coredump
+ which gdb
+ ulimit -c unlimited
+ sudo sysctl -w kernel.core_pattern=/tmp/dpdk-core.%e.%p
kernel.core_pattern = /tmp/dpdk-core.%e.%p
+ devtools/test-null.sh
=================================================================
==67776==ERROR: AddressSanitizer: invalid alignment requested in aligned_alloc: 64, alignment must be a power of two and the requested size 0x8000008 must be a multiple of alignment (thread T0)
    #0 0x5562b2504042 in aligned_alloc (/home/runner/work/dpdk/dpdk/build/app/dpdk-testpmd+0xaad042) (BuildId: 731d8ec8ca4a6bf8e01bfd7548ebeb784aece6e3)
    #1 0x5562b37f671b in lcore_var_alloc /home/runner/work/dpdk/dpdk/build/../lib/eal/common/eal_common_lcore_var.c:77:20
    #2 0x5562b37f671b in rte_lcore_var_alloc /home/runner/work/dpdk/dpdk/build/../lib/eal/common/eal_common_lcore_var.c:123:9
    #3 0x5562b341b902 in rte_power_ethdev_pmgmt_init /home/runner/work/dpdk/dpdk/build/../lib/power/rte_power_pmd_mgmt.c:775:2
    #4 0x7f76b7829eba in call_init csu/../csu/libc-start.c:145:3
    #5 0x7f76b7829eba in __libc_start_main csu/../csu/libc-start.c:379:5

==67776==HINT: if you don't care about these errors you may set allocator_may_return_null=1
SUMMARY: AddressSanitizer: invalid-aligned-alloc-alignment (/home/runner/work/dpdk/dpdk/build/app/dpdk-testpmd+0xaad042) (BuildId: 731d8ec8ca4a6bf8e01bfd7548ebeb784aece6e3) in aligned_alloc
==67776==ABORTING