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Merged
byeongjee merged 2 commits into from
Aug 22, 2026
Merged

Replace stringsearch with the checkpointable variant #84

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e57ceaa
Replace stringsearch with stringsearch_fixed in benchmarks and results
byeongjee Aug 22, 2026
2b5069a
Restore the findme pointer global in stringsearch and re-measure
byeongjee Aug 22, 2026
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6 changes: 5 additions & 1 deletion benchmarks/intermittent/stringsearch.c
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Expand Up @@ -13,6 +13,7 @@
// --- Configuration ---
#define NUM_PATTERNS 26
#define TEXT_LEN 512
#define MAX_PATTERN_LEN 12

// --- Mutable globals (MILP candidates) ---

Expand All @@ -22,7 +23,10 @@ static char *findme __attribute__((used, section(".fram")));

// --- Const data ---

static const char *find_strings[NUM_PATTERNS] = {
/* Stored as a 2-D char array rather than an array of pointers: a pointer array
* in memory has a target-dependent element stride, which breaks the native
* (64-bit) trace replay of IR that was optimized for MSP430's 16-bit pointers. */
static const char find_strings[NUM_PATTERNS][MAX_PATTERN_LEN] = {
"Kur", "gent", "lass", "suns", "for", "xxx", "long", "have", "where",
"xxxxxx", "xxxxxx", "pense", "pow", "xxxxx", "Yo", "and", "faded", "20",
"you", "bac", "an", "way", "possibili", "fat", "imag", "th"};
Expand Down
152 changes: 0 additions & 152 deletions benchmarks/intermittent/stringsearch_fixed.c
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2 changes: 1 addition & 1 deletion results/chunking_overhead/chunked.csv
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Expand Up @@ -11,4 +11,4 @@ sensor_fusion,10uF,ok,859,25121.86,1
poly1305,10uF,ok,923,475356.64,1
cuckoo_filter,10uF,ok,761,41320.7,1
sha256,10uF,ok,1388,90038.68,1
stringsearch_fixed,10uF,ok,1236,35354.39,1
stringsearch,10uF,ok,684,36199.73,1
2 changes: 1 addition & 1 deletion results/intermittent/baseline.csv
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Expand Up @@ -11,4 +11,4 @@ sensor_fusion,613,
poly1305,68,
cuckoo_filter,4048,
sha256_fixed,131,
stringsearch_fixed,20,
stringsearch,20,
2 changes: 1 addition & 1 deletion results/intermittent/baseline_results.py
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Expand Up @@ -29,7 +29,7 @@
"poly1305",
"cuckoo_filter",
"sha256_fixed",
"stringsearch_fixed",
"stringsearch",
]

setup_logging("INFO")
Expand Down
24 changes: 12 additions & 12 deletions results/intermittent/report.md
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Expand Up @@ -29,7 +29,7 @@ Cell: `ok` = completed (stop pulse + __nvm_done) and return code equals the unin
| poly1305 (68) | 10/10 / 10/10 / 1366 / 81 / 22.26 | 10/10 / 10/10 / 4409 / 172 / 61.56 | 10/10 / 10/10 / 2949 / 142 / 44.93 | 10/10 / 10/10 / 2089 / 105 / 32.94 |
| cuckoo_filter (4048) | 10/10 / 10/10 / 169 / 3 / 1.69 | 10/10 / 10/10 / 1902 / 71 / 26.46 | 10/10 / 10/10 / 1018 / 49 / 15.46 | 10/10 / 10/10 / 178 / 3 / 1.80 |
| sha256_fixed (131) | 10/10 / 10/10 / 184 / 9 / 2.44 | 10/10 / 10/10 / 1098 / 35 / 14.31 | 10/10 / 10/10 / 425 / 13 / 5.63 | 10/10 / 10/10 / 346 / 15 / 4.86 |
| stringsearch_fixed (20) | 10/10 / 10/10 / 208 / 2 / 1.98 | 9/10 / 9/9 / 7991 / 360 / 118.34 | 10/10 / 10/10 / 600 / 19 / 7.63 | 10/10 / 10/10 / 232 / 5 / 2.45 |
| stringsearch (20) | 10/10 / 10/10 / 208 / 2 / 1.98 | 9/10 / 9/9 / 7991 / 360 / 118.34 | 10/10 / 10/10 / 600 / 19 / 7.63 | 10/10 / 10/10 / 232 / 5 / 2.45 |

## Per trace: waits by benchmark x algorithm (`inc` = incomplete)

Expand All @@ -49,7 +49,7 @@ Cell: `ok` = completed (stop pulse + __nvm_done) and return code equals the unin
| poly1305 | 132 | 322 | 275 | 185 |
| cuckoo_filter | 14 | 131 | 88 | 14 |
| sha256_fixed | 18 | 76 | 37 | 34 |
| stringsearch_fixed | 15 | 609 | 46 | 17 |
| stringsearch | 15 | 609 | 46 | 17 |

### trace 2

Expand All @@ -67,7 +67,7 @@ Cell: `ok` = completed (stop pulse + __nvm_done) and return code equals the unin
| poly1305 | 131 | 409 | 279 | 193 |
| cuckoo_filter | 15 | 175 | 95 | 17 |
| sha256_fixed | 18 | 96 | 41 | 33 |
| stringsearch_fixed | 21 | 813 | 59 | 21 |
| stringsearch | 21 | 813 | 59 | 21 |

### trace 3

Expand All @@ -85,7 +85,7 @@ Cell: `ok` = completed (stop pulse + __nvm_done) and return code equals the unin
| poly1305 | 129 | 666 | 341 | 243 |
| cuckoo_filter | 20 | 304 | 121 | 21 |
| sha256_fixed | 17 | 181 | 56 | 33 |
| stringsearch_fixed | 25 | 1513 | 84 | 29 |
| stringsearch | 25 | 1513 | 84 | 29 |

### trace 4

Expand All @@ -103,7 +103,7 @@ Cell: `ok` = completed (stop pulse + __nvm_done) and return code equals the unin
| poly1305 | 137 | 525 | 285 | 185 |
| cuckoo_filter | 18 | 224 | 105 | 18 |
| sha256_fixed | 19 | 138 | 42 | 34 |
| stringsearch_fixed | 25 | inc | 63 | 29 |
| stringsearch | 25 | inc | 63 | 29 |

### trace 5

Expand All @@ -121,7 +121,7 @@ Cell: `ok` = completed (stop pulse + __nvm_done) and return code equals the unin
| poly1305 | 138 | 402 | 288 | 215 |
| cuckoo_filter | 18 | 175 | 101 | 21 |
| sha256_fixed | 19 | 102 | 43 | 35 |
| stringsearch_fixed | 22 | 849 | 61 | 23 |
| stringsearch | 22 | 849 | 61 | 23 |

### trace 6

Expand All @@ -139,7 +139,7 @@ Cell: `ok` = completed (stop pulse + __nvm_done) and return code equals the unin
| poly1305 | 131 | 383 | 273 | 203 |
| cuckoo_filter | 17 | 161 | 98 | 17 |
| sha256_fixed | 17 | 91 | 34 | 33 |
| stringsearch_fixed | 19 | 761 | 54 | 22 |
| stringsearch | 19 | 761 | 54 | 22 |

### trace 7

Expand All @@ -157,7 +157,7 @@ Cell: `ok` = completed (stop pulse + __nvm_done) and return code equals the unin
| poly1305 | 128 | 391 | 273 | 190 |
| cuckoo_filter | 16 | 177 | 94 | 17 |
| sha256_fixed | 17 | 99 | 41 | 33 |
| stringsearch_fixed | 21 | 795 | 56 | 21 |
| stringsearch | 21 | 795 | 56 | 21 |

### trace 8

Expand All @@ -175,7 +175,7 @@ Cell: `ok` = completed (stop pulse + __nvm_done) and return code equals the unin
| poly1305 | 148 | 559 | 323 | 252 |
| cuckoo_filter | 20 | 247 | 117 | 21 |
| sha256_fixed | 20 | 136 | 49 | 37 |
| stringsearch_fixed | 26 | 1182 | 74 | 28 |
| stringsearch | 26 | 1182 | 74 | 28 |

### trace 9

Expand All @@ -193,7 +193,7 @@ Cell: `ok` = completed (stop pulse + __nvm_done) and return code equals the unin
| poly1305 | 137 | 365 | 298 | 204 |
| cuckoo_filter | 18 | 151 | 97 | 18 |
| sha256_fixed | 19 | 89 | 38 | 35 |
| stringsearch_fixed | 19 | 728 | 51 | 20 |
| stringsearch | 19 | 728 | 51 | 20 |

### trace 10

Expand All @@ -211,7 +211,7 @@ Cell: `ok` = completed (stop pulse + __nvm_done) and return code equals the unin
| poly1305 | 155 | 387 | 314 | 219 |
| cuckoo_filter | 13 | 157 | 102 | 14 |
| sha256_fixed | 20 | 90 | 44 | 39 |
| stringsearch_fixed | 15 | 741 | 52 | 22 |
| stringsearch | 15 | 741 | 52 | 22 |

## Per benchmark x algorithm x trace

Expand Down Expand Up @@ -323,7 +323,7 @@ Cell: `ok` = completed (stop pulse + __nvm_done) and return code equals the unin
| schematic | ok w=37 rec=1 t=2.58s | ok w=41 rec=0 t=1.86s | ok w=56 rec=0 t=1.05s | ok w=42 rec=0 t=11.13s | ok w=43 rec=2 t=8.08s | ok w=34 rec=0 t=1.65s | ok w=41 rec=0 t=6.56s | ok w=49 rec=4 t=6.99s | ok w=38 rec=0 t=8.42s | ok w=44 rec=6 t=7.95s |
| schematicO3 | ok w=34 rec=1 t=2.53s | ok w=33 rec=0 t=1.62s | ok w=33 rec=0 t=0.67s | ok w=34 rec=1 t=8.67s | ok w=35 rec=2 t=6.27s | ok w=33 rec=0 t=1.61s | ok w=33 rec=0 t=5.52s | ok w=37 rec=3 t=5.51s | ok w=35 rec=2 t=8.33s | ok w=39 rec=6 t=7.91s |

### stringsearch_fixed (baseline result 20)
### stringsearch (baseline result 20)

| algo | tr1 | tr2 | tr3 | tr4 | tr5 | tr6 | tr7 | tr8 | tr9 | tr10 |
|---|---|---|---|---|---|---|---|---|---|---|
Expand Down
2 changes: 1 addition & 1 deletion results/intermittent/run_all.sh
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Expand Up @@ -3,7 +3,7 @@
# traces. Resumable: a (benchmark, algo) CSV with one row per trace is skipped;
# a partial one (interrupted run) is deleted and redone.
cd "$(dirname "$0")/../.." || exit 1
BENCHMARKS="aes crc rsa dijkstra qsort activity_recognition bitcount chacha20 sensor_fusion poly1305 cuckoo_filter sha256_fixed stringsearch_fixed"
BENCHMARKS="aes crc rsa dijkstra qsort activity_recognition bitcount chacha20 sensor_fusion poly1305 cuckoo_filter sha256_fixed stringsearch"
ALGOS="milp rockclimb schematic schematicO3"
TRACES=1,2,3,4,5,6,7,8,9,10
NTRACES=10
Expand Down
11 changes: 11 additions & 0 deletions results/intermittent/stringsearch/milp.csv
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@@ -0,0 +1,11 @@
benchmark,capacitor,trace,status,region_boundaries,compilation_time_ms,profiling_time_ms,replay_seconds,execution_time_us,runtime_region_boundary_calls,runtime_wait_count,runtime_recovery_boots,result
stringsearch,board,1,ok,5,317,667,2.28,195335.25,,15,0,20
stringsearch,board,2,ok,5,317,667,3.23,705316.37,,21,0,20
stringsearch,board,3,ok,5,317,667,4.15,306573.92,,25,0,20
stringsearch,board,4,ok,5,317,667,7.77,5238685.13,,25,0,20
stringsearch,board,5,ok,5,317,667,5.65,3164907.24,,22,1,20
stringsearch,board,6,ok,5,317,667,2.97,1111396.51,,19,0,20
stringsearch,board,7,ok,5,317,667,4.71,3070378.24,,21,0,20
stringsearch,board,8,ok,5,317,667,5.07,2388693.79,,26,1,20
stringsearch,board,9,ok,5,317,667,6.12,3381397.35,,19,0,20
stringsearch,board,10,ok,5,317,667,1.95,195066.87,,15,0,20
11 changes: 11 additions & 0 deletions results/intermittent/stringsearch/rockclimb.csv
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@@ -0,0 +1,11 @@
benchmark,capacitor,trace,status,region_boundaries,compilation_time_ms,profiling_time_ms,replay_seconds,execution_time_us,runtime_region_boundary_calls,runtime_wait_count,runtime_recovery_boots,result
stringsearch,board,1,ok,8,1,0,50.82,48771746.86,,609,19,20
stringsearch,board,2,ok,8,1,0,63.25,60649105.41,,813,15,20
stringsearch,board,3,ok,8,1,0,60.41,56538987.04,,1513,14,20
stringsearch,board,4,incomplete,8,1,0,209.59,,,,,
stringsearch,board,5,ok,8,1,0,170.01,167435070.55,,849,54,20
stringsearch,board,6,ok,8,1,0,75.17,73326835.21,,761,14,20
stringsearch,board,7,ok,8,1,0,130.51,128763235.09,,795,0,20
stringsearch,board,8,ok,8,1,0,189.73,187146437.18,,1182,121,20
stringsearch,board,9,ok,8,1,0,183.63,180833671.24,,728,0,20
stringsearch,board,10,ok,8,1,0,163.35,161628023.13,,741,123,20
11 changes: 11 additions & 0 deletions results/intermittent/stringsearch/schematic.csv
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@@ -0,0 +1,11 @@
benchmark,capacitor,trace,status,region_boundaries,compilation_time_ms,profiling_time_ms,replay_seconds,execution_time_us,runtime_region_boundary_calls,runtime_wait_count,runtime_recovery_boots,result
stringsearch,board,1,ok,6,3,599,4.81,2684370.54,,46,1,20
stringsearch,board,2,ok,6,3,599,6.91,4325362.96,,59,1,20
stringsearch,board,3,ok,6,3,599,5.26,1305452.47,,84,0,20
stringsearch,board,4,ok,6,3,599,16.45,13936256.96,,63,0,20
stringsearch,board,5,ok,6,3,599,13.67,11185165.0,,61,3,20
stringsearch,board,6,ok,6,3,599,6.58,4695178.15,,54,1,20
stringsearch,board,7,ok,6,3,599,10.77,9028889.63,,56,0,20
stringsearch,board,8,ok,6,3,599,12.77,10154306.97,,74,6,20
stringsearch,board,9,ok,6,3,599,13.65,10910445.66,,51,1,20
stringsearch,board,10,ok,6,3,599,9.85,8061779.88,,52,6,20
11 changes: 11 additions & 0 deletions results/intermittent/stringsearch/schematicO3.csv
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@@ -0,0 +1,11 @@
benchmark,capacitor,trace,status,region_boundaries,compilation_time_ms,profiling_time_ms,replay_seconds,execution_time_us,runtime_region_boundary_calls,runtime_wait_count,runtime_recovery_boots,result
stringsearch,board,1,ok,4,2,810,2.34,222568.19,,17,0,20
stringsearch,board,2,ok,4,2,810,3.35,722558.65,,21,0,20
stringsearch,board,3,ok,4,2,810,4.24,356535.47,,29,0,20
stringsearch,board,4,ok,4,2,810,8.49,6036410.19,,29,0,20
stringsearch,board,5,ok,4,2,810,5.77,3190619.46,,23,1,20
stringsearch,board,6,ok,4,2,810,3.02,1125077.85,,22,0,20
stringsearch,board,7,ok,4,2,810,4.78,3085789.27,,21,0,20
stringsearch,board,8,ok,4,2,810,4.99,2404458.99,,28,1,20
stringsearch,board,9,ok,4,2,810,6.19,3424477.75,,20,0,20
stringsearch,board,10,ok,4,2,810,5.69,3967698.43,,22,3,20
11 changes: 0 additions & 11 deletions results/intermittent/stringsearch_fixed/milp.csv
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11 changes: 0 additions & 11 deletions results/intermittent/stringsearch_fixed/rockclimb.csv
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11 changes: 0 additions & 11 deletions results/intermittent/stringsearch_fixed/schematic.csv
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