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

703.8

AVG LATENCYns

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

ATOM

ReqTagbus

0x3E

0x5C

0x98

0x1C

0x75

0xC1

0x94

0xC0

0xBE

0xED

0x2F

0x13

0xC2

0x06

0x96

0xF3

0x48

0x90

0xC4

0x53

0x49

0xE5

0x0E

0x8F

0xC9

ReqAddrbus

0x8C

0x72

0xB5

0x3B

0xFF

0x8A

0x02

0x25

0x59

0x2B

0xEC

0xF6

0x67

0xD0

0x6E

0x28

ReqVCbus

ReqPoolbus

ReqCreditVldbit

RdRspVldbit

RdRspTagbus

0x43

0x38

0x05

0x6A

0xD7

0x31

0x15

0x4A

0xC1

0xA0

0x91

0x24

0xE4

0xF7

0x0C

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
12,025	ACC7	ACC2	SWITCH	READ	RD	0x01	0	0	128B	21.6ns	● OK
12,064	ACC11	ACC0	SWITCH	MSG	MSG	0x02	3	2	64B	171.5ns	● ERR
12,095	ACC4	ACC2	DL	READ	RD	0x03	0	1	640B	24.6ns	● OK
12,103	ACC5	ACC6	UPLI	MSG	MSG	0x04	3	1	128B	27.7ns	● OK
12,126	ACC8	ACC7	PCS	WRITE	WR	0x05	0	0	64B	60.2ns	● OK
12,140	ACC9	ACC4	DL	ATOMIC	ATOMIC_ADD	0x06	0	0	640B	90.9ns	● OK
12,161	ACC4	ACC0	DL	ATOMIC	ATOMIC_ADD	0x07	0	0	512B	186ns	● OK
12,202	ACC1	ACC6	TL	READ	RD	0x08	2	4	256B	43.2ns	● ERR
12,238	ACC0	ACC11	SWITCH	ATOMIC	ATOMIC_CAS	0x09	0	1	256B	104.7ns	● OK
12,254	ACC6	ACC11	UPLI	MSG	MSG	0x0A	2	6	128B	104.3ns	● OK
12,262	ACC8	ACC7	DL	MSG	MSG	0x0B	0	0	640B	109.6ns	● REPLAY
12,276	ACC7	ACC5	DL	WRITE	WR	0x0C	0	5	64B	44.5ns	● OK
12,309	ACC8	ACC10	PCS	MSG	MSG	0x0D	3	7	256B	166.1ns	● OK
12,334	ACC11	ACC6	PCS	RESPONSE	RESP	0x0E	2	1	640B	78.4ns	● OK
12,350	ACC7	ACC1	DL	ATOMIC	ATOMIC_CAS	0x0F	2	1	64B	22.6ns	● OK
12,372	ACC2	ACC3	PCS	RESPONSE	RESP	0x10	3	1	640B	55.3ns	● OK
12,411	ACC11	ACC0	DL	ATOMIC	ATOMIC_CAS	0x11	2	0	256B	42.6ns	● OK
12,436	ACC7	ACC6	SWITCH	ATOMIC	ATOMIC_ADD	0x12	3	4	256B	160.3ns	● OK
12,467	ACC2	ACC3	DL	MSG	MSG	0x13	3	1	128B	25.4ns	● OK
12,498	ACC4	ACC5	UPLI	ATOMIC	ATOMIC_CAS	0x14	0	5	640B	109.1ns	● OK
12,505	ACC0	ACC5	SWITCH	RESPONSE	RESP	0x15	2	5	640B	65.4ns	● OK
12,519	ACC6	ACC9	SWITCH	ATOMIC	ATOMIC_CAS	0x16	2	5	64B	134.6ns	● OK
12,544	ACC0	ACC11	SWITCH	ATOMIC	ATOMIC_CAS	0x17	3	4	256B	164.7ns	● OK
12,570	ACC4	ACC9	SWITCH	WRITE	WR	0x18	3	4	640B	125.1ns	● OK
12,612	ACC3	ACC10	TL	READ	RD	0x19	3	0	640B	137.7ns	● OK
12,623	ACC9	ACC11	DL	READ	RD	0x1A	1	1	256B	197.4ns	● WARN
12,648	ACC10	ACC3	UPLI	READ	RD	0x1B	3	2	512B	67.2ns	● OK
12,657	ACC1	ACC2	SWITCH	READ	RD	0x1C	1	3	128B	97.5ns	● OK
12,695	ACC7	ACC4	SWITCH	ATOMIC	ATOMIC_ADD	0x1D	1	7	640B	182.3ns	● OK
12,703	ACC10	ACC11	SWITCH	WRITE	WR	0x1E	2	3	256B	35.4ns	● OK
12,742	ACC9	ACC5	SWITCH	ATOMIC	ATOMIC_ADD	0x1F	0	0	512B	47.9ns	● OK
12,775	ACC11	ACC10	DL	MSG	MSG	0x20	2	4	64B	48.4ns	● OK
12,812	ACC2	ACC0	DL	MSG	MSG	0x21	3	3	256B	154.1ns	● OK
12,818	ACC5	ACC6	TL	RESPONSE	RESP	0x22	3	7	64B	80.4ns	● OK
12,828	ACC2	ACC8	PCS	READ	RD	0x23	3	1	64B	147.4ns	● OK
12,846	ACC2	ACC7	TL	MSG	MSG	0x24	2	4	128B	60.4ns	● OK
12,860	ACC0	ACC4	DL	ATOMIC	ATOMIC_CAS	0x25	0	4	512B	62.8ns	● OK
12,883	ACC10	ACC11	PCS	WRITE	WR	0x26	1	5	256B	94.9ns	● ERR
12,899	ACC10	ACC1	TL	READ	RD	0x27	3	5	256B	177.4ns	● OK
12,921	ACC2	ACC11	PCS	ATOMIC	ATOMIC_ADD	0x28	1	2	640B	126.7ns	● OK