fix(austinp): ensure threads are resumed on sampling errors

[P403n1x87]

We make sure that threads are resumed regardless of potential errors during the sampling of the threads.

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Description of the Change

Alternate Designs

Regressions

Verification Process

[codecov]

Codecov Report

Patch coverage: 78.43% and project coverage change: -0.01% ⚠️

Comparison is base (aa557cb) 67.98% compared to head (5964c1b) 67.98%.

Additional details and impacted files

@@            Coverage Diff             @@
##            devel     #199      +/-   ##
==========================================
- Coverage   67.98%   67.98%   -0.01%     
==========================================
  Files          27       27              
  Lines        2499     2508       +9     
  Branches      765      766       +1     
==========================================
+ Hits         1699     1705       +6     
- Misses        464      465       +1     
- Partials      336      338       +2     

Files Changed	Coverage Δ
src/py_proc.c	62.85% <78.43%> (+0.08%)	⬆️

... and 4 files with indirect coverage changes

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[github-actions]

Austin Benchmarks

Running Austin benchmarks with Python 3.10.13

Benchmark Summary

Comparison of dev against 3.5.0.

The following scenarios show a statistically significant difference in performance between the two versions.

	Sample Rate	Saturation	Error Rate	Sampling Speed
Wall time [sampling interval: 1]	🟢	🟡	🟡	🟡
CPU time [sampling interval: 1]	🟢	🟡	🟡	🟡
CPU time [sampling interval: 100]	🟡	🟡	🟢	🟡

Benchmark Results

Wall time [sampling interval: 1]

Wall time [sampling interval: 1]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	118000 ± 2000	1 ± 0	8e-06 ± 4e-06	13.2 ± 0.4
3.5.0	119000 ± 3000	1 ± 0	9e-06 ± 3e-06	13.1 ± 0.6
dev	121000 ± 2000	1 ± 0	8e-06 ± 4e-06	12.9 ± 0.3

Wall time [sampling interval: 10]

Wall time [sampling interval: 10]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	118000 ± 3000	0.5443 ± 0.0009	6e-06 ± 4e-06	13.2 ± 0.4
3.5.0	118000 ± 4000	0.544 ± 0.001	8e-06 ± 4e-06	13.1 ± 0.3
dev	120000 ± 3000	0.544 ± 0.002	7e-06 ± 6e-06	13.1 ± 0.3

Wall time [sampling interval: 100]

Wall time [sampling interval: 100]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	10300 ± 300	0.0008 ± 0.0001	3e-05 ± 2e-05	15.6 ± 0.5
3.5.0	10400 ± 300	0.0008 ± 0.0001	2e-05 ± 3e-05	15.7 ± 0.8
dev	10300 ± 200	0.0008 ± 0.0002	2e-05 ± 3e-05	15.1 ± 0.7

Wall time [sampling interval: 1000]

Wall time [sampling interval: 1000]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	1860 ± 20	0.0002 ± 0.0003	0.0001 ± 0.0001	21 ± 1
3.5.0	1860 ± 20	0.0001 ± 0.0002	2e-05 ± 6e-05	20.4 ± 1.0
dev	1850 ± 20	0.0001 ± 0.0002	4e-05 ± 8e-05	21.1 ± 1.0

CPU time [sampling interval: 1]

CPU time [sampling interval: 1]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	52000 ± 2000	1 ± 0	1.3e-05 ± 6e-06	23.0 ± 0.7
3.5.0	52000 ± 1000	1 ± 0	1e-05 ± 9e-06	22.8 ± 0.4
dev	53000 ± 1000	1 ± 0	1e-05 ± 5e-06	22.4 ± 0.5

CPU time [sampling interval: 10]

CPU time [sampling interval: 10]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	52000 ± 1000	0.9983 ± 0.0002	1.8e-05 ± 9e-06	22.9 ± 0.3
3.5.0	52000 ± 2000	0.9984 ± 0.0003	1.4e-05 ± 5e-06	22.9 ± 0.6
dev	52000 ± 2000	0.998 ± 0.001	1.2e-05 ± 6e-06	22.8 ± 0.4

CPU time [sampling interval: 100]

CPU time [sampling interval: 100]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	5300 ± 100	0.0015 ± 0.0005	6e-05 ± 4e-05	25 ± 1
3.5.0	5250 ± 50	0.0014 ± 0.0003	0.00013 ± 5e-05	24.7 ± 0.7
dev	5400 ± 300	0.0015 ± 0.0004	6e-05 ± 8e-05	24.7 ± 0.9

CPU time [sampling interval: 1000]

CPU time [sampling interval: 1000]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	946 ± 2	0.0005 ± 0.0005	0.0001 ± 0.0002	34 ± 2
3.5.0	946 ± 3	0.0005 ± 0.0009	0.0001 ± 0.0002	35 ± 4
dev	947 ± 7	0.0004 ± 0.0005	0.0001 ± 0.0002	35 ± 2

RSA keygen [sampling interval: 1]

RSA keygen [sampling interval: 1]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	39000 ± 1000	1 ± 0	0.0002 ± 0.0002	24.8 ± 0.8
3.5.0	39200 ± 800	1 ± 0	0.0002 ± 0.0002	24.9 ± 0.3
dev	39000 ± 1000	1 ± 0	0.0002 ± 0.0002	25.1 ± 0.7

RSA keygen [sampling interval: 10]

RSA keygen [sampling interval: 10]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	38000 ± 3000	0.983 ± 0.009	0.0003 ± 0.0002	26 ± 2
3.5.0	39000 ± 1000	0.986 ± 0.009	0.0003 ± 0.0003	24.8 ± 0.8
dev	39400 ± 600	0.98 ± 0.01	0.0002 ± 0.0002	24.7 ± 0.7

RSA keygen [sampling interval: 100]

RSA keygen [sampling interval: 100]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	6290 ± 20	0.003 ± 0.002	0.0007 ± 0.0005	28 ± 1
3.5.0	6290 ± 10	0.003 ± 0.002	0.0005 ± 0.0005	28 ± 1
dev	6260 ± 50	0.004 ± 0.004	0.001 ± 0.001	30 ± 2

RSA keygen [sampling interval: 1000]

RSA keygen [sampling interval: 1000]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	938 ± 6	0 ± 0	0.001 ± 0.003	36 ± 3
3.5.0	940 ± 2	0 ± 0	0.001 ± 0.002	36 ± 4
dev	937 ± 7	0.001 ± 0.002	0.002 ± 0.002	38 ± 6

Full metrics [sampling interval: 1]

Full metrics [sampling interval: 1]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	51000 ± 2000	1 ± 0	0.0001 ± 0.0001	30 ± 1
3.5.0	51200 ± 800	1 ± 0	2.3e-05 ± 9e-06	30.1 ± 0.6
dev	51000 ± 2000	1 ± 0	2.1e-05 ± 8e-06	30 ± 1

Full metrics [sampling interval: 10]

Full metrics [sampling interval: 10]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	51000 ± 1000	1 ± 0	2.5e-05 ± 1e-05	30.2 ± 0.8
3.5.0	51000 ± 1000	1 ± 0	2.4e-05 ± 7e-06	30 ± 1
dev	51000 ± 2000	1 ± 0	3e-05 ± 1e-05	30 ± 1

Full metrics [sampling interval: 100]

Full metrics [sampling interval: 100]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	9800 ± 300	0.0024 ± 0.0005	5e-05 ± 4e-05	35.2 ± 0.9
3.5.0	9800 ± 300	0.0024 ± 0.0004	4e-05 ± 3e-05	35.3 ± 0.7
dev	9700 ± 200	0.0023 ± 0.0004	3e-05 ± 5e-05	34.7 ± 0.9

Full metrics [sampling interval: 1000]

Full metrics [sampling interval: 1000]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	1850 ± 30	0.0003 ± 0.0003	2e-05 ± 6e-05	41.1 ± 1.0
3.5.0	1850 ± 20	0.0004 ± 0.0004	0 ± 0	41 ± 1
dev	1860 ± 20	0.0003 ± 0.0004	0.0001 ± 0.0001	41 ± 2

Multiprocess wall time [sampling interval: 1]

Multiprocess wall time [sampling interval: 1]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	2500 ± 200	1 ± 0	0.00018 ± 5e-05	257 ± 10
3.5.0	3000 ± 100	1 ± 0	0.0003 ± 0.0003	320 ± 10
dev	3000 ± 100	1 ± 0	0.00017 ± 7e-05	320 ± 10

Multiprocess wall time [sampling interval: 10]

Multiprocess wall time [sampling interval: 10]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	2400 ± 200	1 ± 0	0.0003 ± 0.0004	270 ± 20
3.5.0	3000 ± 200	1 ± 0	0.0002 ± 0.0003	320 ± 20
dev	3200 ± 200	1 ± 0	0.00015 ± 4e-05	300 ± 20

Multiprocess wall time [sampling interval: 100]

Multiprocess wall time [sampling interval: 100]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	2300 ± 100	0.03 ± 0.02	0.00011 ± 4e-05	270 ± 20
3.5.0	3000 ± 200	0.05 ± 0.02	9e-05 ± 3e-05	320 ± 20
dev	3000 ± 200	0.04 ± 0.02	9e-05 ± 5e-05	310 ± 20

Multiprocess wall time [sampling interval: 1000]

Multiprocess wall time [sampling interval: 1000]

	Sample Rate	Saturation	Error Rate	Sampling Speed
3.4.1	2100 ± 200	0.001 ± 0.0004	4e-05 ± 4e-05	45 ± 1
3.5.0	2900 ± 100	0.012 ± 0.003	3e-05 ± 2e-05	90 ± 10
dev	2900 ± 100	0.011 ± 0.002	1e-05 ± 2e-05	86 ± 8