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Solarflare Server Adapter User Guide
Solarflare Adapters on Linux
Issue 20 © Solarflare Communications 2017 124
lro_chain_max
1
Maximum length of chains in the LRO hash
table.
uint 20
lro_idle_jiffies
1
Time (in jiffies) after which an idle connection's
LRO state is discarded.
uint 101
lro_slow_start_packets
1
Number of packets that must pass in ‐ order
before starting LRO.
uint 20000
lro_loss_packets
1
Number of packets that must pass in ‐ order
following loss before restarting LRO.
uint 20
rx_desc_cache_size Set RX descriptor cache size. int 64
tx_desc_cache_size Set TX descriptor cache size. int 16
rx_xoff_thresh_bytes RX fifo XOFF threshold. int ‐ 1 (auto)
rx_xon_thresh_bytes RX fifo XON threshold. int ‐ 1 (auto)
lro Large receive offload acceleration int 1
separate_tx_channels Use separate channels for TX and RX uint 0
rss_cpus Number of CPUs to use for Receive ‐ Side
Scaling, or 'packages', 'cores' or 'hyperthreads'
uint or
string
<empty>
irq_adapt_enable Enable adaptive interrupt moderation uint 1
irq_adapt_low_thresh Threshold score for reducing IRQ moderation uint 10000
irq_adapt_high_thresh Threshold score for increasing IRQ moderation uint 20000
irq_adapt_irqs Number of IRQs per IRQ moderation
adaptation
uint 1000
napi_weight NAPI weighting uint 64
rx_irq_mod_usec Receive interrupt moderation (microseconds) uint 60
tx_irq_mod_usec Transmit interrupt moderation (microseconds) uint 150
allow_load_on_failure If set then allow driver load when online self ‐
tests fail
uint 0
onload_offline_selftest Perform offline self ‐ test on load uint 1
interrupt_mode Interrupt mode (0=MSIX, 1=MSI, 2=legacy) uint 0
falcon_force_internal_sram Force internal SRAM to be used int 0
Table 27: Driver Module Parameters
Parameter Description Possible
Value
Default
Value