diff options
Diffstat (limited to 'scripts/system/vyatta-auto-irqaffin.pl')
| -rwxr-xr-x | scripts/system/vyatta-auto-irqaffin.pl | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/scripts/system/vyatta-auto-irqaffin.pl b/scripts/system/vyatta-auto-irqaffin.pl index be294439..54b75638 100755 --- a/scripts/system/vyatta-auto-irqaffin.pl +++ b/scripts/system/vyatta-auto-irqaffin.pl @@ -100,6 +100,7 @@ sub intel_func{ my $rx_queues; # number of rx queues my $tx_queues; # number of tx queues my $ht_factor; # 2 if HT enabled, 1 if not + my $start_cpu; # CPU number to start assignment at log_msg("intel_func was called.\n"); @@ -126,10 +127,35 @@ sub intel_func{ exit 1; } + + # Special case of a single-queue masquarading as a multi-queue NIC + if ($rx_queues == 1) { + $ifname =~ m/^eth(.*)$/; + + my $ifunit = $1; + log_msg ("ifunit = $ifunit\n"); + + if ($numcpus > $numcores) { + # Hyperthreaded + $start_cpu = (2 * $ifunit) % $numcpus; + + # every other time it wraps, add one to use the hyper-thread pair + # of the CPU selected. + my $use_ht = ((2 * $ifunit) / $numcpus) % 2; + $start_cpu += $use_ht; + } else { + # Not hyperthreaded. Map it to unit number MOD number of linux CPUs. + $start_cpu = $ifunit % $numcpus; + } + } else { + $start_cpu = 0; + } + # For i = 0 to number of queues: # Affinity of rx and tx queue $i gets CPU ($i * (2 if HT, 1 if no HT)) # % number_of_cpus - for (my $queue = 0, my $cpu = 0; ($queue < $rx_queues) ; $queue++) { + for (my $queue = 0, my $cpu = $start_cpu; ($queue < $rx_queues) ; + $queue++) { # Generate the hex string for the bitmask representing this CPU my $cpu_bit = 1 << $cpu; my $cpu_hex = sprintf("%x", $cpu_bit); |