Ryousei Takano a écrit :
This patch includes the PSPacer (Precise Software Pacer) qdisc
module, which achieves precise transmission bandwidth control.
You can find more information at the project web page
(http://www.gridmpi.org/gridtcp.jsp).
Signed-off-by: Ryousei Takano <[EMAIL PROTECTED]>
+static struct sk_buff *alloc_gap_packet(struct Qdisc* sch, int size)
+{
+ struct sk_buff *skb;
+ struct net_device *dev = sch->dev;
+ unsigned char *pkt;
+ int pause_time = 0;
+ int pktsize = size + 2;
+
+ skb = alloc_skb(pktsize, GFP_ATOMIC);
+ if (!skb)
+ return NULL;
+
+ skb_reserve(skb, 2);
minor nit, but skb_reserve is not *needed* here.
skb_reserve() is used to align IP header on a 16 bytes boundary, and
we do it on rx side to speedup IP stack, at the cost of a possibly more
expensive DMA transfert.
Here you dont send an IP packet, do you ?
+
+ pkt = skb->data;
+ memset(pkt, 0xff, pktsize);
+ pkt[0] = 0x01; /* dst address: 01:80:c2:00:00:01 */
+ pkt[1] = 0x80;
+ pkt[2] = 0xc2;
+ pkt[3] = 0x00;
+ pkt[4] = 0x00;
+ pkt[5] = 0x01;
+ memcpy(pkt + 6, dev->dev_addr, ETH_ALEN /* dev->addr_len */);
+
+ pkt[12] = 0x88; /* MAC control: 88 08 */
+ pkt[13] = 0x08;
+ pkt[14] = 0; /* MAC control opcode: 00 01 */
+ pkt[15] = 1;
+ pkt[16] = pause_time >> 8;
+ pkt[17] = pause_time;
+
+ skb_put(skb, size);
+
+ skb->dev = sch->dev;
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