How to enable logging and where to find the logs

[Sindhura Bandi <sindhura.bandi@certesnetworks.com>]

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Hi Everyone,

I might be asking a basic question here. I'm facing some issues while bringing up a dpdk interface on ovs-dpdk on debian-12. Dpdk version is 22.11.1.
Dpdk seems to fail to allocate a mempool, even though there seem to be enough free huge page memory available on the machine.

I tried to enable dpdk debugs using the following command,
ovs-vsctl set Open_vSwitch . other_config:dpdk-extra="--log-level=lib.mbuf:debug"

The command was accepted, but I don't see any logs from dpdk anywhere in my /var/log.

I get the following information from ovs logs.

Feb 22 01:03:42 cep ovs-vswitchd[108468]: ovs|00237|netdev_dpdk|ERR|Failed to create mempool "ovs013337e900021580020512" with a request of 20512 mbufs
Feb 22 01:03:42 cep ovs-vswitchd[108468]: ovs|00238|netdev_dpdk|ERR|Failed to create memory pool for netdev vhost-user0, with MTU 1500 on socket 0: No such file or directory
Feb 22 01:03:42 cep ovs-vswitchd[108468]: ovs|00239|dpif_netdev|ERR|Failed to set interface vhost-user0 new configuration

Checked ovs code, and its callingvrte_pktmbuf_pool_create(), which is failing with "No such file or directory". I would like to enable debugs for lib.mbuf.
Please let me know if I'm missing anything.

Thanks,
Sindhu

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