UALink Protocol Analyzer & Visualization Workstation

modeACC ↔ ACC

cmd

srcdstaddrlenvcpool

Packet Flow • ACC ↔ Switch ↔ ACC

tx=1284 rx=1281 replay=3 crc_err=0

DATA

CREDIT RETURN

CONTROL

AGGREGATE BANDWIDTHGB/s

721.5

AVG LATENCYns

100

CREDIT UTILIZATION%

Switch Fabric • Routing & Congestion4 switches • 256 ports

Waveform Viewer

cursor @ t=56ns • Δ=84ns • 1ns/div

time (ns)

100

110

ReqVldbit

ReqCmdbus

ATOM

MSG

ATOM

MSG

ReqTagbus

0x5A

0x19

0xE8

0x4C

0xE9

0x2B

0xF6

0x4E

0x33

0x38

0xFB

0x9D

0x8C

0x55

ReqAddrbus

0x4F

0x13

0x9D

0x70

0x4D

0x26

0x15

0xF5

0xA2

0xC5

0xAF

0x9E

0x7F

0x2F

ReqVCbus

ReqPoolbus

ReqCreditVldbit

RdRspVldbit

RdRspTagbus

0x68

0xBB

0x71

0x65

0xB3

0xAD

0xA2

0xFD

0x00

0x75

0x2A

0x46

RdRspStatusbus

ERR

Credit Flowlive

Request Credits84/128

Response Credits96/128

Pool Credits42/64

VC Credits22/32

Error Injection Laboratorystress the stack

Transaction Timeline40 events • live

UPLI TL DL PCS SWITCH

Time (ns)	Src	Dst	Layer	Type	Cmd	Tag	VC	Pool	Size	Latency	Status
23,147	ACC7	ACC10	TL	MSG	MSG	0xB9	2	0	640B	133.6ns	● OK
23,182	ACC6	ACC5	UPLI	WRITE	WR	0xBA	2	6	640B	123.3ns	● OK
23,223	ACC10	ACC7	DL	READ	RD	0xBB	3	5	512B	67.8ns	● OK
23,248	ACC4	ACC6	UPLI	RESPONSE	RESP	0xBC	3	6	512B	106.4ns	● OK
23,286	ACC4	ACC11	PCS	MSG	MSG	0xBD	1	0	512B	194.6ns	● OK
23,321	ACC3	ACC2	PCS	RESPONSE	RESP	0xBE	3	6	512B	77ns	● OK
23,347	ACC4	ACC0	DL	MSG	MSG	0xBF	2	2	128B	38.5ns	● WARN
23,355	ACC7	ACC4	TL	MSG	MSG	0xC0	3	6	512B	160.3ns	● OK
23,381	ACC7	ACC0	TL	READ	RD	0xC1	1	0	256B	92.7ns	● OK
23,425	ACC5	ACC6	SWITCH	ATOMIC	ATOMIC_CAS	0xC2	3	4	128B	97.5ns	● OK
23,453	ACC2	ACC1	SWITCH	ATOMIC	ATOMIC_CAS	0xC3	2	5	640B	159.8ns	● OK
23,467	ACC1	ACC7	TL	MSG	MSG	0xC4	3	5	640B	77ns	● OK
23,509	ACC6	ACC11	SWITCH	MSG	MSG	0xC5	1	7	512B	48ns	● OK
23,549	ACC4	ACC2	TL	ATOMIC	ATOMIC_ADD	0xC6	3	0	64B	47.1ns	● OK
23,559	ACC0	ACC6	SWITCH	READ	RD	0xC7	1	6	128B	134.5ns	● OK
23,599	ACC8	ACC9	TL	RESPONSE	RESP	0xC8	0	2	128B	170ns	● OK
23,618	ACC8	ACC10	DL	RESPONSE	RESP	0xC9	2	4	640B	177.6ns	● OK
23,639	ACC7	ACC3	TL	ATOMIC	ATOMIC_ADD	0xCA	2	0	640B	38.3ns	● OK
23,665	ACC3	ACC10	UPLI	ATOMIC	ATOMIC_ADD	0xCB	1	2	64B	133.5ns	● OK
23,702	ACC0	ACC2	TL	READ	RD	0xCC	1	2	256B	107.7ns	● OK
23,728	ACC8	ACC2	SWITCH	MSG	MSG	0xCD	1	3	640B	94.5ns	● OK
23,756	ACC4	ACC10	TL	READ	RD	0xCE	0	2	512B	67.2ns	● OK
23,786	ACC9	ACC3	UPLI	ATOMIC	ATOMIC_ADD	0xCF	2	2	512B	133.7ns	● OK
23,828	ACC5	ACC8	SWITCH	READ	RD	0xD0	0	1	256B	199.2ns	● OK
23,854	ACC11	ACC8	UPLI	WRITE	WR	0xD1	1	2	256B	113.3ns	● OK
23,870	ACC1	ACC4	UPLI	ATOMIC	ATOMIC_ADD	0xD2	0	6	128B	21.7ns	● OK
23,892	ACC1	ACC2	DL	MSG	MSG	0xD3	0	2	64B	152.3ns	● OK
23,923	ACC4	ACC9	SWITCH	WRITE	WR	0xD4	2	2	128B	94.9ns	● OK
23,938	ACC5	ACC2	SWITCH	WRITE	WR	0xD5	1	0	512B	60.7ns	● OK
23,951	ACC10	ACC5	PCS	ATOMIC	ATOMIC_CAS	0xD6	2	2	640B	42ns	● OK
23,984	ACC6	ACC5	UPLI	RESPONSE	RESP	0xD7	3	2	256B	160.3ns	● OK
24,007	ACC6	ACC8	SWITCH	ATOMIC	ATOMIC_CAS	0xD8	3	7	640B	186.6ns	● OK
24,051	ACC9	ACC6	TL	MSG	MSG	0xD9	3	7	512B	181.8ns	● OK
24,062	ACC3	ACC4	UPLI	MSG	MSG	0xDA	2	5	256B	137ns	● OK
24,103	ACC10	ACC11	SWITCH	WRITE	WR	0xDB	1	6	640B	149.1ns	● OK
24,113	ACC4	ACC9	SWITCH	WRITE	WR	0xDC	1	3	64B	125.2ns	● OK
24,145	ACC1	ACC9	TL	RESPONSE	RESP	0xDD	3	3	512B	135.6ns	● OK
24,159	ACC7	ACC5	SWITCH	READ	RD	0xDE	0	1	640B	199.6ns	● OK
24,191	ACC8	ACC4	SWITCH	MSG	MSG	0xDF	1	1	64B	116.4ns	● OK
24,230	ACC10	ACC11	SWITCH	ATOMIC	ATOMIC_CAS	0xE0	3	6	128B	119.2ns	● OK