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This adds a tx_maxrate attribute to the tx queue sysfs entry allowing for max-rate limiting. Along with DCB-ETS and BQL this provides another knob to tune queue performance. The limit units are Mbps. By default it is disabled. To disable the rate limitation after it has been set for a queue, it should be set to zero. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
87 lines
2.9 KiB
Text
87 lines
2.9 KiB
Text
What: /sys/class/<iface>/queues/rx-<queue>/rps_cpus
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Date: March 2010
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KernelVersion: 2.6.35
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Contact: netdev@vger.kernel.org
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Description:
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Mask of the CPU(s) currently enabled to participate into the
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Receive Packet Steering packet processing flow for this
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network device queue. Possible values depend on the number
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of available CPU(s) in the system.
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What: /sys/class/<iface>/queues/rx-<queue>/rps_flow_cnt
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Date: April 2010
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KernelVersion: 2.6.35
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Contact: netdev@vger.kernel.org
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Description:
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Number of Receive Packet Steering flows being currently
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processed by this particular network device receive queue.
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What: /sys/class/<iface>/queues/tx-<queue>/tx_timeout
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Date: November 2011
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KernelVersion: 3.3
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Contact: netdev@vger.kernel.org
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Description:
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Indicates the number of transmit timeout events seen by this
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network interface transmit queue.
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What: /sys/class/<iface>/queues/tx-<queue>/tx_maxrate
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Date: March 2015
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KernelVersion: 4.1
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Contact: netdev@vger.kernel.org
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Description:
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A Mbps max-rate set for the queue, a value of zero means disabled,
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default is disabled.
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What: /sys/class/<iface>/queues/tx-<queue>/xps_cpus
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Date: November 2010
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KernelVersion: 2.6.38
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Contact: netdev@vger.kernel.org
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Description:
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Mask of the CPU(s) currently enabled to participate into the
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Transmit Packet Steering packet processing flow for this
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network device transmit queue. Possible vaules depend on the
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number of available CPU(s) in the system.
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What: /sys/class/<iface>/queues/tx-<queue>/byte_queue_limits/hold_time
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Date: November 2011
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KernelVersion: 3.3
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Contact: netdev@vger.kernel.org
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Description:
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Indicates the hold time in milliseconds to measure the slack
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of this particular network device transmit queue.
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Default value is 1000.
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What: /sys/class/<iface>/queues/tx-<queue>/byte_queue_limits/inflight
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Date: November 2011
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KernelVersion: 3.3
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Contact: netdev@vger.kernel.org
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Description:
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Indicates the number of bytes (objects) in flight on this
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network device transmit queue.
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What: /sys/class/<iface>/queues/tx-<queue>/byte_queue_limits/limit
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Date: November 2011
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KernelVersion: 3.3
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Contact: netdev@vger.kernel.org
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Description:
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Indicates the current limit of bytes allowed to be queued
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on this network device transmit queue. This value is clamped
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to be within the bounds defined by limit_max and limit_min.
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What: /sys/class/<iface>/queues/tx-<queue>/byte_queue_limits/limit_max
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Date: November 2011
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KernelVersion: 3.3
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Contact: netdev@vger.kernel.org
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Description:
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Indicates the absolute maximum limit of bytes allowed to be
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queued on this network device transmit queue. See
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include/linux/dynamic_queue_limits.h for the default value.
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What: /sys/class/<iface>/queues/tx-<queue>/byte_queue_limits/limit_min
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Date: November 2011
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KernelVersion: 3.3
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Contact: netdev@vger.kernel.org
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Description:
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Indicates the absolute minimum limit of bytes allowed to be
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queued on this network device transmit queue. Default value is
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0.
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