Characterizing the Effects of Intermittent Faults on a Processor for Dependability Enhancement Strategy

Table 6

Sensitivity breakup per unit for LDST workload ((a) for NET and (b) for REG).

(a) For NET (%)

Units	Module	Transient faults	Intermittent faults									Permanent faults
			B2_	B2_	B2_	B4_	B4_	B4_	B8_	B8_	B8_
			0.01–0.1	0.1–1	1–10	0.01–0.1	0.1–1	1–10	0.01–0.1	0.1–1	1–10
PKU	PKU_PCK	2.6	0.9	3.9	9.2	1.7	7.4	8.7	3.1	5.2	9.6	9.6
	PKU_PKD	1.1	2.9	21.7	38.3	6.6	24.6	48.3	13.1	31.1	56.6	54.6
	PKU_SWL	2.0	4.4	14.1	26.2	5.2	16.9	26.2	9.7	20.2	29.0	33.1
AGEN	IFU_AGD	0.5	1.4	5.6	11.7	2.3	8.5	13.1	6.1	8.5	17.4	26.3
	IFU_AGC	2.1	1.3	11.7	17.9	4.6	14.2	20.0	6.3	15.4	24.6	26.7
Decoder	DEC_DED	0.8	1.6	2.8	9.3	2.4	3.2	13.4	2.0	4.5	19.0	20.6
	DEC_DCD	0.3	0.3	2.0	6.3	0.3	1.4	10.9	0.0	2.9	17.7	27.1
	DEC_DEL	0.9	1.3	12.9	19.3	3.0	14.2	24.0	5.6	14.2	30.0	30.5
ALU	EXU_ECT	0.5	1.8	1.8	9.2	1.4	4.6	11.0	2.8	6.9	15.6	20.2
	EXU_EDP	0.9	0.9	4.1	10.6	1.8	3.2	11.9	1.8	5.5	23.9	39.4
IRF	EXU_IRF	0.4	0.8	5.9	19.5	2.1	8.9	25.4	3.8	11.9	39.0	47.5
	EXU_RML	0.0	1.2	2.8	7.3	1.2	4.5	8.5	2.0	4.5	13.4	10.9
	EXU_ECC	0.0	1.3	1.3	4.3	2.2	1.7	6.1	1.7	3.5	8.2	13.9

(b) For REG (%)

Units	Module	Transient faults	Intermittent faults									Permanent faults
			B2_	B2_	B2_	B4_	B4_	B4_	B8_	B8_	B8_
			0.01–0.1	0.1–1	1–10	0.01–0.1	0.1–1	1–10	0.01–0.1	0.1–1	1–10
PKU	PKU_PCK	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
	PKU_PKD	—	—	—	—	—	—	—	—	—	—	—
	PKU_SWL	9.8	9.8	9.8	17.6	7.8	12.7	16.7	10.8	14.7	22.5	26.5
AGEN	IFU_AGD	0.0	0.0	1.5	3.6	0.7	0.7	4.4	0.0	5.1	8.0	7.3
	IFU_AGC	0.9	0.9	0.0	3.6	0.9	2.7	4.5	1.8	2.7	7.3	12.7
Decoder	DEC_DED	2.9	1.9	1.9	19.4	1.0	3.9	22.3	3.9	13.6	35.0	24.3
	DEC_DCD	—	—	—	—	—	—	—	—	—	—	—
	DEC_DEL	1.7	2.6	6.0	6.0	3.4	0.9	12.8	1.7	7.7	12.8	16.2
ALU	EXU_ECT	0.8	0.0	1.5	3.0	0.0	3.8	3.8	0.8	3.0	3.8	12.9
	EXU_EDP	0.8	2.3	3.8	5.3	3.8	2.3	11.4	0.0	6.1	20.5	28.8
IRF	EXU_IRF	4.4	2.6	8.8	19.3	3.5	11.4	29.8	5.3	21.9	39.5	51.8
	EXU_RML	4.9	4.9	4.9	5.8	4.9	4.9	9.7	4.9	5.8	11.7	4.9
	EXU_ECC	0.0	1.7	0.8	0.8	0.8	1.7	1.7	0.0	2.5	2.5	1.7