AuroraMiddleware/zstd
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Change cover_sum back to 2 parameters and fix splitPoint issues

Browse Source
This commit is contained in:
Jennifer Liu 2018-07-06 14:24:18 -07:00
parent 0bbff01211
commit 015a00af0f
2 changed files with 7 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
lib/dictBuilder/cover.c
View File

@ -223,10 +223,10 @@ static COVER_ctx_t *g_ctx = NULL;
/**
* Returns the sum of the sample sizes.
*/
static size_t COVER_sum(const size_t *samplesSizes, unsigned firstSample, unsigned lastSample) {
static size_t COVER_sum(const size_t *samplesSizes, unsigned nbSamples) {
size_t sum = 0;
unsigned i;
for (i = firstSample; i < lastSample; ++i) {
for (i = 0; i < nbSamples; ++i) {
sum += samplesSizes[i];
}
return sum;
@ -540,13 +540,12 @@ static int COVER_ctx_init(COVER_ctx_t *ctx, const void *samplesBuffer,
const size_t *samplesSizes, unsigned nbSamples,
unsigned d, double splitPoint) {
const BYTE *const samples = (const BYTE *)samplesBuffer;
const unsigned kFirst = 0;
const size_t totalSamplesSize = COVER_sum(samplesSizes, kFirst, nbSamples);
const size_t totalSamplesSize = COVER_sum(samplesSizes, nbSamples);
/* Split samples into testing and training sets */
const unsigned nbTrainSamples = splitPoint < 1.0 ? (unsigned)((double)nbSamples * splitPoint) : nbSamples;
const unsigned nbTestSamples = splitPoint < 1.0 ? nbSamples - nbTrainSamples : nbSamples;
const size_t trainingSamplesSize = splitPoint < 1.0 ? COVER_sum(samplesSizes, kFirst, nbTrainSamples) : totalSamplesSize;
const size_t testSamplesSize = splitPoint < 1.0 ? COVER_sum(samplesSizes, nbTrainSamples, nbSamples) : totalSamplesSize;
const size_t trainingSamplesSize = splitPoint < 1.0 ? COVER_sum(samplesSizes, nbTrainSamples) : totalSamplesSize;
const size_t testSamplesSize = splitPoint < 1.0 ? COVER_sum(samplesSizes + nbTrainSamples, nbTestSamples) : totalSamplesSize;
/* Checks */
if (totalSamplesSize < MAX(d, sizeof(U64)) ||
totalSamplesSize >= (size_t)COVER_MAX_SAMPLES_SIZE) {
@ -564,11 +563,6 @@ static int COVER_ctx_init(COVER_ctx_t *ctx, const void *samplesBuffer,
DISPLAYLEVEL(1, "Total number of testing samples is %u and is invalid.", nbTestSamples);
return 0;
}
/* Check if nbTrainSamples plus nbTestSamples add up to nbSamples when splitPoint is less than 1*/
if (nbTrainSamples + nbTestSamples != nbSamples && splitPoint < 1.0) {
DISPLAYLEVEL(1, "nbTrainSamples plus nbTestSamples don't add up to nbSamples");
return 0;
}
/* Zero the context */
memset(ctx, 0, sizeof(*ctx));
DISPLAYLEVEL(2, "Training on %u samples of total size %u\n", nbTrainSamples,
@ -976,7 +970,7 @@ ZDICTLIB_API size_t ZDICT_optimizeTrainFromBuffer_cover(
/* constants */
const unsigned nbThreads = parameters->nbThreads;
const double splitPoint =
(parameters->splitPoint <= 0.0 || parameters->splitPoint > 1.0) ? DEFAULT_SPLITPOINT : parameters->splitPoint;
parameters->splitPoint <= 0.0 ? DEFAULT_SPLITPOINT : parameters->splitPoint;
const unsigned kMinD = parameters->d == 0 ? 6 : parameters->d;
const unsigned kMaxD = parameters->d == 0 ? 8 : parameters->d;
const unsigned kMinK = parameters->k == 0 ? 50 : parameters->k;

2
lib/dictBuilder/zdict.h
View File

@ -86,7 +86,7 @@ typedef struct {
unsigned d; /* dmer size : constraint: 0 < d <= k : Reasonable range [6, 16] */
unsigned steps; /* Number of steps : Only used for optimization : 0 means default (32) : Higher means more parameters checked */
unsigned nbThreads; /* Number of threads : constraint: 0 < nbThreads : 1 means single-threaded : Only used for optimization : Ignored if ZSTD_MULTITHREAD is not defined */
double splitPoint; /* Percentage of samples used for training: the first nbSamples * splitPoint samples will be used to training */
double splitPoint; /* Percentage of samples used for training: the first nbSamples * splitPoint samples will be used to training, 0 means default (0.8) */
ZDICT_params_t zParams;
} ZDICT_cover_params_t;