Hi, all, I tried to compare windows xp booting time by using Microsoft bootvis.
For the first glance, ipxe always slower than local HDD than about 5 seconds. The bootvis showed the disk init time of local HDD is about 2.2 seconds, and iPXE is about 15.5 seconds. Than I tried to use wireshark to observe what happened in iPXE's disk init time. From the following captured message, I found there has a 15 seconds gap that iSCSI connection seemed to get into trouble. 29408 15.646359 192.168.1.63 192.168.1.2 iSCSI SCSI: Data Out LUN: 0x00 (Write(10) Request Data) 29409 15.646374 192.168.1.2 192.168.1.63 TCP iscsi-target > 28906 [ACK] Seq=18548589 Ack=86633 Win=18760 Len=0 TSV=624524 TSER=577920 29410 15.646818 192.168.1.2 192.168.1.63 iSCSI SCSI: Response LUN: 0x00 (Write(10)) (Good) 29411 15.647008 192.168.1.63 192.168.1.2 TCP 28906 > iscsi-target [ACK] Seq=86633 Ack=18548637 Win=8192 Len=0 TSV=577920 TSER=624524 29412 17.443849 QuantaCo_9b:e4:69 Broadcast ARP Gratuitous ARP for 192.168.1.63 (Request) 29413 18.018077 QuantaCo_9b:e4:69 Broadcast ARP Who has 192.168.1.2? Tell 192.168.1.63 29414 18.018090 Giga-Byt_d6:86:bc QuantaCo_9b:e4:69 ARP 192.168.1.2 is at 1c:6f:65:d6:86:bc 29415 18.018191 192.168.1.63 192.168.1.2 TCP cap > iscsi-target [SYN] Seq=0 Win=65535 Len=0 MSS=1460 SACK_PERM=1 29416 18.018212 192.168.1.2 192.168.1.63 TCP iscsi-target > cap [ACK] Seq=1 Ack=2229090051 Win=65535 Len=0 29417 18.018318 192.168.1.63 192.168.1.2 TCP cap > iscsi-target [RST] Seq=2229090051 Win=0 Len=0 29418 18.439915 QuantaCo_9b:e4:69 Broadcast ARP Gratuitous ARP for 192.168.1.63 (Request) 29419 19.439930 QuantaCo_9b:e4:69 Broadcast ARP Gratuitous ARP for 192.168.1.63 (Request) 29420 20.986835 192.168.1.63 192.168.1.2 TCP cap > iscsi-target [SYN] Seq=0 Win=65535 Len=0 MSS=1460 SACK_PERM=1 29421 20.986862 192.168.1.2 192.168.1.63 TCP [TCP Previous segment lost] iscsi-target > cap [SYN, ACK] Seq=590980907 Ack=1 Win=14600 Len=0 MSS=1460 SACK_PERM=1 29422 20.986966 192.168.1.63 192.168.1.2 TCP cap > iscsi-target [ACK] Seq=1 Ack=590980908 Win=65535 Len=0 29423 20.987203 192.168.1.63 192.168.1.2 iSCSI Login Command 29424 20.987222 192.168.1.2 192.168.1.63 TCP iscsi-target > cap [ACK] Seq=590980908 Ack=197 Win=15544 Len=0 29422 20.986966 192.168.1.63 192.168.1.2 TCP cap > iscsi-target [ACK] Seq=1 Ack=590980908 Win=65535 Len=0 29423 20.987203 192.168.1.63 192.168.1.2 iSCSI Login Command 29424 20.987222 192.168.1.2 192.168.1.63 TCP iscsi-target > cap [ACK] Seq=590980908 Ack=197 Win=15544 Len=0 29425 20.987376 192.168.1.2 192.168.1.63 iSCSI Login Response (Success) 29426 20.987715 192.168.1.63 192.168.1.2 iSCSI Login Command 29427 20.987815 192.168.1.2 192.168.1.63 iSCSI Login Response (Success) 29428 21.190002 192.168.1.2 192.168.1.63 iSCSI [TCP Retransmission] Login Response (Success) 29429 21.190154 192.168.1.63 192.168.1.2 TCP cap > iscsi-target [ACK] Seq=545 Ack=590981300 Win=65143 Len=0 29430 30.987718 192.168.1.63 192.168.1.2 iSCSI SCSI: Report LUNs LUN: 0x00 29431 30.987878 192.168.1.2 192.168.1.63 iSCSI SCSI: Data In LUN: 0x00 (Report LUNs Response Data) SCSI: Response LUN: 0x00 (Report LUNs) (Good) 29432 30.988292 192.168.1.63 192.168.1.2 iSCSI SCSI: Inquiry LUN: 0x00 Could you give me some advise about what could be wrong? Is it possible that iPXE can boot faster than local HDD? Thanks! Regards, Jerry
_______________________________________________ ipxe-devel mailing list [email protected] https://lists.ipxe.org/mailman/listinfo/ipxe-devel
