49 lines
2.7 KiB
Plaintext
49 lines
2.7 KiB
Plaintext
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S2IO Technologies XFrame 10 Gig adapter.
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-------------------------------------------
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I. Module loadable parameters.
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When loaded as a module, the driver provides a host of Module loadable
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parameters, so the device can be tuned as per the users needs.
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A list of the Module params is given below.
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(i) ring_num: This can be used to program the number of
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receive rings used in the driver.
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(ii) ring_len: This defines the number of descriptors each ring
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can have. There can be a maximum of 8 rings.
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(iii) frame_len: This is an array of size 8. Using this we can
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set the maximum size of the received frame that can
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be steered into the corrsponding receive ring.
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(iv) fifo_num: This defines the number of Tx FIFOs thats used in
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the driver.
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(v) fifo_len: Each element defines the number of
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Tx descriptors that can be associated with each
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corresponding FIFO. There are a maximum of 8 FIFOs.
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(vi) tx_prio: This is a bool, if module is loaded with a non-zero
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value for tx_prio multi FIFO scheme is activated.
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(vii) rx_prio: This is a bool, if module is loaded with a non-zero
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value for tx_prio multi RING scheme is activated.
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(viii) latency_timer: The value given against this param will be
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loaded into the latency timer register in PCI Config
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space, else the register is left with its reset value.
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II. Performance tuning.
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By changing a few sysctl parameters.
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Copy the following lines into a file and run the following command,
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"sysctl -p <file_name>"
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### IPV4 specific settings
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net.ipv4.tcp_timestamps = 0 # turns TCP timestamp support off, default 1, reduces CPU use
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net.ipv4.tcp_sack = 0 # turn SACK support off, default on
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# on systems with a VERY fast bus -> memory interface this is the big gainer
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net.ipv4.tcp_rmem = 10000000 10000000 10000000 # sets min/default/max TCP read buffer, default 4096 87380 174760
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net.ipv4.tcp_wmem = 10000000 10000000 10000000 # sets min/pressure/max TCP write buffer, default 4096 16384 131072
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net.ipv4.tcp_mem = 10000000 10000000 10000000 # sets min/pressure/max TCP buffer space, default 31744 32256 32768
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### CORE settings (mostly for socket and UDP effect)
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net.core.rmem_max = 524287 # maximum receive socket buffer size, default 131071
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net.core.wmem_max = 524287 # maximum send socket buffer size, default 131071
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net.core.rmem_default = 524287 # default receive socket buffer size, default 65535
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net.core.wmem_default = 524287 # default send socket buffer size, default 65535
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net.core.optmem_max = 524287 # maximum amount of option memory buffers, default 10240
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net.core.netdev_max_backlog = 300000 # number of unprocessed input packets before kernel starts dropping them, default 300
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---End of performance tuning file---
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