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perf: Change CairoRunError::VmException to Box<VmException> #1756

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@fmoletta fmoletta commented May 8, 2024

PR #1720 Added a small error variant to the CairoRunError which brought a huge performance regression. This is due to the VmException variant having a big size, making all other variants equally as big. This PR solves this issue by wrapping the VmException contained in its corresponding variant, and adds a test to ensure that the size of CairoRunError doesn't surpass 32 bytes

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github-actions bot commented May 8, 2024

**Hyper Thereading Benchmark results**




hyperfine -r 2 -n "hyper_threading_main threads: 1" 'RAYON_NUM_THREADS=1 ./hyper_threading_main' -n "hyper_threading_pr threads: 1" 'RAYON_NUM_THREADS=1 ./hyper_threading_pr'
Benchmark 1: hyper_threading_main threads: 1
  Time (mean ± σ):     27.212 s ±  0.002 s    [User: 26.331 s, System: 0.879 s]
  Range (min … max):   27.211 s … 27.214 s    2 runs
 
Benchmark 2: hyper_threading_pr threads: 1
  Time (mean ± σ):     26.887 s ±  0.077 s    [User: 26.107 s, System: 0.778 s]
  Range (min … max):   26.833 s … 26.942 s    2 runs
 
Summary
  'hyper_threading_pr threads: 1' ran
    1.01 ± 0.00 times faster than 'hyper_threading_main threads: 1'




hyperfine -r 2 -n "hyper_threading_main threads: 2" 'RAYON_NUM_THREADS=2 ./hyper_threading_main' -n "hyper_threading_pr threads: 2" 'RAYON_NUM_THREADS=2 ./hyper_threading_pr'
Benchmark 1: hyper_threading_main threads: 2
  Time (mean ± σ):     14.597 s ±  0.013 s    [User: 26.937 s, System: 0.829 s]
  Range (min … max):   14.587 s … 14.606 s    2 runs
 
Benchmark 2: hyper_threading_pr threads: 2
  Time (mean ± σ):     14.787 s ±  0.017 s    [User: 26.764 s, System: 0.793 s]
  Range (min … max):   14.776 s … 14.799 s    2 runs
 
Summary
  'hyper_threading_main threads: 2' ran
    1.01 ± 0.00 times faster than 'hyper_threading_pr threads: 2'




hyperfine -r 2 -n "hyper_threading_main threads: 4" 'RAYON_NUM_THREADS=4 ./hyper_threading_main' -n "hyper_threading_pr threads: 4" 'RAYON_NUM_THREADS=4 ./hyper_threading_pr'
Benchmark 1: hyper_threading_main threads: 4
  Time (mean ± σ):     11.112 s ±  0.007 s    [User: 38.620 s, System: 0.992 s]
  Range (min … max):   11.107 s … 11.117 s    2 runs
 
Benchmark 2: hyper_threading_pr threads: 4
  Time (mean ± σ):     10.602 s ±  0.413 s    [User: 38.032 s, System: 0.933 s]
  Range (min … max):   10.310 s … 10.893 s    2 runs
 
Summary
  'hyper_threading_pr threads: 4' ran
    1.05 ± 0.04 times faster than 'hyper_threading_main threads: 4'




hyperfine -r 2 -n "hyper_threading_main threads: 6" 'RAYON_NUM_THREADS=6 ./hyper_threading_main' -n "hyper_threading_pr threads: 6" 'RAYON_NUM_THREADS=6 ./hyper_threading_pr'
Benchmark 1: hyper_threading_main threads: 6
  Time (mean ± σ):     10.734 s ±  0.229 s    [User: 39.018 s, System: 0.998 s]
  Range (min … max):   10.572 s … 10.896 s    2 runs
 
Benchmark 2: hyper_threading_pr threads: 6
  Time (mean ± σ):     10.630 s ±  0.346 s    [User: 38.248 s, System: 0.970 s]
  Range (min … max):   10.385 s … 10.875 s    2 runs
 
Summary
  'hyper_threading_pr threads: 6' ran
    1.01 ± 0.04 times faster than 'hyper_threading_main threads: 6'




hyperfine -r 2 -n "hyper_threading_main threads: 8" 'RAYON_NUM_THREADS=8 ./hyper_threading_main' -n "hyper_threading_pr threads: 8" 'RAYON_NUM_THREADS=8 ./hyper_threading_pr'
Benchmark 1: hyper_threading_main threads: 8
  Time (mean ± σ):     10.591 s ±  0.118 s    [User: 39.393 s, System: 1.006 s]
  Range (min … max):   10.508 s … 10.674 s    2 runs
 
Benchmark 2: hyper_threading_pr threads: 8
  Time (mean ± σ):     10.379 s ±  0.040 s    [User: 38.488 s, System: 1.041 s]
  Range (min … max):   10.351 s … 10.407 s    2 runs
 
Summary
  'hyper_threading_pr threads: 8' ran
    1.02 ± 0.01 times faster than 'hyper_threading_main threads: 8'




hyperfine -r 2 -n "hyper_threading_main threads: 16" 'RAYON_NUM_THREADS=16 ./hyper_threading_main' -n "hyper_threading_pr threads: 16" 'RAYON_NUM_THREADS=16 ./hyper_threading_pr'
Benchmark 1: hyper_threading_main threads: 16
  Time (mean ± σ):     10.662 s ±  0.041 s    [User: 39.583 s, System: 1.014 s]
  Range (min … max):   10.633 s … 10.691 s    2 runs
 
Benchmark 2: hyper_threading_pr threads: 16
  Time (mean ± σ):     10.320 s ±  0.090 s    [User: 38.833 s, System: 1.086 s]
  Range (min … max):   10.257 s … 10.384 s    2 runs
 
Summary
  'hyper_threading_pr threads: 16' ran
    1.03 ± 0.01 times faster than 'hyper_threading_main threads: 16'


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github-actions bot commented May 8, 2024

Benchmark Results for unmodified programs 🚀

Command Mean [s] Min [s] Max [s] Relative
base big_factorial 2.041 ± 0.010 2.030 2.060 1.00
head big_factorial 2.058 ± 0.059 2.027 2.225 1.01 ± 0.03
Command Mean [s] Min [s] Max [s] Relative
base big_fibonacci 1.993 ± 0.014 1.976 2.020 1.00
head big_fibonacci 2.000 ± 0.018 1.979 2.031 1.00 ± 0.01
Command Mean [s] Min [s] Max [s] Relative
base blake2s_integration_benchmark 7.597 ± 0.076 7.490 7.721 1.00
head blake2s_integration_benchmark 7.619 ± 0.151 7.457 7.952 1.00 ± 0.02
Command Mean [s] Min [s] Max [s] Relative
base compare_arrays_200000 2.120 ± 0.029 2.094 2.175 1.01 ± 0.02
head compare_arrays_200000 2.107 ± 0.018 2.086 2.138 1.00
Command Mean [s] Min [s] Max [s] Relative
base dict_integration_benchmark 1.422 ± 0.020 1.407 1.478 1.01 ± 0.02
head dict_integration_benchmark 1.402 ± 0.006 1.394 1.414 1.00
Command Mean [s] Min [s] Max [s] Relative
base field_arithmetic_get_square_benchmark 1.291 ± 0.017 1.276 1.336 1.00 ± 0.02
head field_arithmetic_get_square_benchmark 1.289 ± 0.013 1.275 1.316 1.00
Command Mean [s] Min [s] Max [s] Relative
base integration_builtins 7.680 ± 0.134 7.520 7.985 1.01 ± 0.02
head integration_builtins 7.624 ± 0.077 7.481 7.722 1.00
Command Mean [s] Min [s] Max [s] Relative
base keccak_integration_benchmark 7.873 ± 0.188 7.725 8.367 1.00
head keccak_integration_benchmark 7.895 ± 0.100 7.710 8.026 1.00 ± 0.03
Command Mean [s] Min [s] Max [s] Relative
base linear_search 2.065 ± 0.011 2.051 2.086 1.00
head linear_search 2.087 ± 0.031 2.053 2.144 1.01 ± 0.02
Command Mean [s] Min [s] Max [s] Relative
base math_cmp_and_pow_integration_benchmark 1.693 ± 0.006 1.681 1.701 1.01 ± 0.01
head math_cmp_and_pow_integration_benchmark 1.675 ± 0.010 1.663 1.694 1.00
Command Mean [s] Min [s] Max [s] Relative
base math_integration_benchmark 1.598 ± 0.019 1.584 1.650 1.01 ± 0.02
head math_integration_benchmark 1.585 ± 0.016 1.563 1.621 1.00
Command Mean [s] Min [s] Max [s] Relative
base memory_integration_benchmark 1.191 ± 0.004 1.184 1.200 1.00 ± 0.01
head memory_integration_benchmark 1.188 ± 0.008 1.175 1.196 1.00
Command Mean [s] Min [s] Max [s] Relative
base operations_with_data_structures_benchmarks 1.828 ± 0.043 1.799 1.945 1.02 ± 0.02
head operations_with_data_structures_benchmarks 1.798 ± 0.006 1.790 1.809 1.00
Command Mean [ms] Min [ms] Max [ms] Relative
base pedersen 524.8 ± 4.8 519.0 535.5 1.02 ± 0.01
head pedersen 514.6 ± 5.7 511.8 530.7 1.00
Command Mean [ms] Min [ms] Max [ms] Relative
base poseidon_integration_benchmark 964.9 ± 4.3 957.5 971.3 1.00
head poseidon_integration_benchmark 965.9 ± 6.2 959.2 979.2 1.00 ± 0.01
Command Mean [s] Min [s] Max [s] Relative
base secp_integration_benchmark 1.857 ± 0.020 1.838 1.898 1.01 ± 0.01
head secp_integration_benchmark 1.848 ± 0.015 1.830 1.873 1.00
Command Mean [ms] Min [ms] Max [ms] Relative
base set_integration_benchmark 643.8 ± 5.4 639.3 657.7 1.00
head set_integration_benchmark 660.0 ± 2.2 658.2 665.7 1.03 ± 0.01
Command Mean [s] Min [s] Max [s] Relative
base uint256_integration_benchmark 4.206 ± 0.037 4.168 4.291 1.00
head uint256_integration_benchmark 4.245 ± 0.064 4.140 4.338 1.01 ± 0.02

@@ -153,7 +159,13 @@ pub fn cairo_run_pie(

cairo_runner
.run_until_pc(end, &mut vm, hint_processor)
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I think I identified why this doesn't work. By this point the Result<_, VirtualMachineError> is already returned. What we need to make smaller is the VirtualMachineError itself.
Also, ProgramError is potentially big and contributes to CairoRunError's size as well. This is because of the IO and Parse variants as well as all of the ones containing String.
It shouldn't matter for the common case as this happens once at the beginning and once at the end. However, VirtualMachineError is likely to be returned in several places.

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RunnerError::PageNotOnSegment(Relocatable, usize) is one candidate to boxing.

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VirtualMachineError is 32 bits already, should we make it even smaller?

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Bytes, but yeah, it's used in many places. I'm not sure the error is the culprit though.

@fmoletta fmoletta closed this May 14, 2024
@fmoletta fmoletta deleted the box-vm-exception branch May 14, 2024 13:46
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