packetblaster: use default number of tx/rx descriptors

src/apps/intel/intel10g.lua

@@ -23,8 +23,7 @@ local timer = require("core.timer")
 local bits, bitset = lib.bits, lib.bitset
 local band, bor, lshift = bit.band, bit.bor, bit.lshift
 
-num_descriptors = 512
---num_descriptors = 32
+num_descriptors = 2048
 
 -- Defaults for configurable items
 local default = {

src/core/packet.lua

@@ -22,7 +22,7 @@ local header_size = 8
 local max_payload = tonumber(C.PACKET_PAYLOAD_SIZE)
 
 -- Freelist containing empty packets ready for use.
-local max_packets = 1e5
+local max_packets = 1e6
 local packet_allocation_step = 1000
 local packets_allocated = 0
 local packets_fl = freelist.new("struct packet *", max_packets)
@@ -108,7 +108,8 @@ function length (p) return p.length end
 
 function preallocate_step()
    if _G.developer_debug then
-      assert(packets_allocated + packet_allocation_step <= max_packets)
+      assert(packets_allocated + packet_allocation_step <= max_packets,
+             "packet allocation overflow")
    end
 
    for i=1, packet_allocation_step do

src/program/packetblaster/packetblaster.lua

@@ -84,7 +84,6 @@ function run (args)
    end
    assert(nics > 0, "<PCI> matches no suitable devices.")
    engine.busywait = true
-   intel10g.num_descriptors = 32*1024
    engine.configure(c)
    local fn = function ()
                  print("Transmissions (last 1 sec):")