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Previously in OVS, a PMD thread running on cpu X used lcore X. This assumption limited OVS to run PMD threads on physical cpu < RTE_MAX_LCORE. DPDK 20.08 introduced a new API that associates a non-EAL thread to a free lcore. This new API does not change the thread characteristics (like CPU affinity) and let OVS run its PMD threads on any cpu regardless of RTE_MAX_LCORE. The DPDK multiprocess feature is not compatible with this new API and is disabled. DPDK still limits the number of lcores to RTE_MAX_LCORE (128 on x86_64) which should be enough for OVS pmd threads (hopefully). DPDK lcore/OVS pmd threads mapping are logged at threads when trying to attach a OVS PMD thread, and when detaching. A new command is added to help get DPDK point of view of the DPDK lcores at any time: $ ovs-appctl dpdk/lcore-list lcore 0, socket 0, role RTE, cpuset 0 lcore 1, socket 0, role NON_EAL, cpuset 1 lcore 2, socket 0, role NON_EAL, cpuset 15 Signed-off-by: David Marchand <david.marchand@redhat.com> Acked-by: Kevin Traynor <ktraynor@redhat.com> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com> Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
20 lines
951 B
Groff
20 lines
951 B
Groff
.SS "DPDK COMMANDS"
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These commands manage DPDK components.
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.IP "\fBdpdk/lcore-list\fR"
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Lists the DPDK lcores and their cpu affinity.
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When RTE_MAX_LCORE lcores are registered, some OVS PMD threads won't appear.
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.IP "\fBdpdk/log-list\fR"
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Lists all DPDK components that emit logs and their logging levels.
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.IP "\fBdpdk/log-set\fR [\fIspec\fR]"
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Sets DPDK components logging level. Without any \fIspec\fR, sets the logging
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\fBlevel\fR for all DPDK components to \fBdebug\fR. Otherwise, \fIspec\fR is a
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list of words separated by spaces: a word can be either a logging \fBlevel\fR
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(\fBemergency\fR, \fBalert\fR, \fBcritical\fR, \fBerror\fR, \fBwarning\fR,
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\fBnotice\fR, \fBinfo\fR or \fBdebug\fR) or a \fBpattern\fR matching DPDK
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components (see \fBdpdk/log-list\fR command on \fBovs\-appctl\fR(8)) separated
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by a colon from the logging \fBlevel\fR to apply.
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.IP "\fBdpdk/get-malloc-stats\fR"
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Prints the heap information statistics about DPDK malloc.
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.RE
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