Performance #977
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Performance #977
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matthieu-c-tagheuer
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Tests passed ✓, Code: 17072 B (+0.0%), Stack: 1440 B (+0.0%), Structs: 812 B (+0.0%)
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Can be enabled with LFS_CACHE_TRACE it will output information with LFS_DEBUG
cache trace show lots of possible caching in lfs_dir_traverse
cache recache for block 835 number 4938 line=1683
cache recache for block 882 number 4938 line=1683
cache recache for block 930 number 4938 line=1683
cache recache for block 978 number 4938 line=1683
test
config
.read_size = 4,
.prog_size = 16,
.block_size = 4096,
.block_count = (8*1024),
.cache_size = 1024,
.metadata_max = 1024,
for (int i = 0; i <= 1000; i++) {
char test_path[32];
if (i > 100) {
sprintf(test_path, "testdir/test%d", i-100);
err = lfs_remove(&lfs, test_path);
}
sprintf(test_path, "testdir/test%d", i);
uint32_t prng = i;
lfs_size_t size = 4096 + (test_prng(&prng) & 3);
lfs_file_t file;
err = lfs_file_open(&lfs, &file, test_path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC);
lfs_ssize_t res = lfs_file_write(&lfs, &file, chunk, size);
err = lfs_file_close(&lfs, &file);
}
before patch
top read operation (number of flash read size, number of flash op)
106060, 16976,
106060, 16976,
106560, 19645,
107084, 16977,
108820, 17624,
total read/write
total read=26174188 B write=4287328 B
total num read=1445383 op write=7732 op
after patch
15044, 41
15044, 41
15044, 41
15044, 41
16068, 42,
total read=18809040 B write=4287328 B
total num read=49477 op write=7732 op
cache trace show possible caching in lfs_dir_getslice cache recache for block 83 number 23 line=790 cache recache for block 881 number 23 line=790 cache recache for block 929 number 23 line=790 cache recache for block 977 number 23 line=790 cache recache for block 128 number 24 line=790 For the same test than previous patch before patch top read operation (number of flash read size, number of flash op) 15044, 41 15044, 41 15044, 41 15044, 41 16068, 42 total read/write total read=18809040 B write=4287328 B total num read=49477 op write=7732 op after patch top read operation (number of flash read size, number of flash op) 15044, 41 15044, 41 15044, 41 15044, 41 16068, 42 total read/write total read=18852728 B write=4287328 B total num read=45678 op write=7732 op cache recache for block 882 number 2 line=998 cache recache for block 911 number 2 line=998 cache recache for block 930 number 2 line=998 cache recache for block 959 number 2 line=998 cache recache for block 978 number 2 line=998
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Tests passed ✓, Code: 17256 B (+1.1%), Stack: 1480 B (+2.8%), Structs: 812 B (+0.0%)
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