Christopher Haster
f198c855f6
These locally show the expected O(d(n)) growth of the block_size search when block_count is known. A rough estimate of runtime for a 1 GiB device with a 90 MiB/s read bandwidth (using the mt25q for rough numbers): known bs/bc => ~1.44 us known block_size => ~1.44 us known block_count => ~125 us unknown bs/bc => ~376 ms
85 lines
1.8 KiB
TOML
85 lines
1.8 KiB
TOML
[cases.bench_superblocks_format]
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code = '''
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lfs_t lfs;
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BENCH_START();
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lfs_format(&lfs, cfg) => 0;
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BENCH_STOP();
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'''
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[cases.bench_superblocks_mount]
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defines.KNOWN_BLOCK_SIZE = [true, false]
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defines.KNOWN_BLOCK_COUNT = [true, false]
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# support benchmarking with files
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defines.N = [0, 1024]
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defines.FILE_SIZE = 8
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defines.CHUNK_SIZE = 8
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code = '''
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lfs_t lfs;
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lfs_format(&lfs, cfg) => 0;
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// create files?
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lfs_mount(&lfs, cfg) => 0;
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char name[256];
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uint8_t buffer[CHUNK_SIZE];
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for (lfs_size_t i = 0; i < N; i++) {
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sprintf(name, "file%08x", i);
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lfs_file_t file;
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lfs_file_open(&lfs, &file, name,
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LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
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for (lfs_size_t j = 0; j < FILE_SIZE; j += CHUNK_SIZE) {
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for (lfs_size_t k = 0; k < CHUNK_SIZE; k++) {
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buffer[k] = i+j+k;
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}
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lfs_file_write(&lfs, &file, buffer, CHUNK_SIZE) => CHUNK_SIZE;
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}
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lfs_file_close(&lfs, &file) => 0;
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}
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lfs_unmount(&lfs) => 0;
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if (KNOWN_BLOCK_SIZE) {
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cfg->block_size = BLOCK_SIZE;
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} else {
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cfg->block_size = 0;
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}
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if (KNOWN_BLOCK_COUNT) {
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cfg->block_count = BLOCK_COUNT;
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} else {
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cfg->block_count = 0;
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}
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BENCH_START();
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lfs_mount(&lfs, cfg) => 0;
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BENCH_STOP();
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lfs_unmount(&lfs) => 0;
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'''
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[cases.bench_superblocks_mount_missing]
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defines.KNOWN_BLOCK_SIZE = [true, false]
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defines.KNOWN_BLOCK_COUNT = [true, false]
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code = '''
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lfs_t lfs;
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if (KNOWN_BLOCK_SIZE) {
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cfg->block_size = BLOCK_SIZE;
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} else {
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cfg->block_size = 0;
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}
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if (KNOWN_BLOCK_COUNT) {
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cfg->block_count = BLOCK_COUNT;
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} else {
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cfg->block_count = 0;
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}
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BENCH_START();
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int err = lfs_mount(&lfs, cfg);
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assert(err != 0);
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BENCH_STOP();
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'''
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