/* TODO update description */
int PHS(void *out, size_t outlen, const void *in, size_t inlen, const void *salt, size_t saltlen, unsigned int t_cost, unsigned int m_cost) {
phs_ctx_t ctx;
/* *********** initialization steps *********** */
// derive state size from somewhere
ctx.state_bytes = pow(2, m_cost+8); /* we use at least 256 byte as the state */
ctx.state_words = ctx.state_bytes >> 2; /* we operate on 32-bit words */
ctx.inner_rounds = m_cost >> 4; /* number of times the whole state is overwritten */
if (ctx.inner_rounds < 2) { /* use at least two inner rounds! */
ctx.inner_rounds = 2;
}
ctx.outer_rounds = t_cost; /* number of times we rehash */
if (ctx.outer_rounds == 0) { /* use at least one outer round! */
ctx.outer_rounds = 1;
}
/* allocate memory for the full state (32-bit counter + state) and rehashing */
Dprintf("DEBUG: Allocating %"PRIu64" bytes of memory for prefixed state buffer...\n", (ctx.state_words + 1) * sizeof(uint32_t));
ctx.stateprefix = (uint32_t *) calloc(ctx.state_words + 1, sizeof(uint32_t));
Dprintf("DEBUG: Allocating %"PRIu64" bytes of memory for rehashing buffer...\n", ((PHS_REHASH_SIZE/4) + 1) * sizeof(uint32_t));
ctx.rehashprefix = (uint32_t *) calloc((PHS_REHASH_SIZE/4), sizeof(uint32_t));
/* set the ctx.state and ctx.rehash pointers to the non-prefixed buffer */
ctx.state = ctx.stateprefix + 1;
ctx.rehash = ctx.rehashprefix + 1;
/* initialize state from pw and salt */
Dprintf("DEBUG: initializing state with password and salt...\n");
phs_init(&ctx, salt, in, inlen);
/* **** end of initialization **** */
Dprintf("Info : we could wipe the pw and salt now...\n");
/* *********** Begin DEBUG-only statistics *********** */
#ifdef PHC_DEBUG_STATISTICS
/* allocate space and clear counter values */
for (int i = 0; i < PHS_F_COUNT; i++) {
cnt_idx[i] = 0;
}
/* allocate and clear memory for address counters */
cnt_tgt_addr = (uint64_t*) calloc(ctx.state_words, sizeof(uint64_t));
#endif
/* *********** End DEBUG-only statistics *********** */
/* *********** time wasting computation steps *********** */
for (uint32_t i = 0; i < ctx.outer_rounds; i++) {
Dprintf("DEBUG: executing outer round: %" PRIu32 " \n", i);
/* perform multiple calls to function F and scramble the bits in the state */
phs_upd_state(&ctx);
/* re-distribute entropy */
phs_upd_entropy(&ctx);
}
/* generate 'outlen' bytes of output and store it in 'out' */
phs_gen_output(&ctx, outlen, out);
/* Clean up the memory we allocated */
Dprintf("DEBUG: freeing state...\n");
free(ctx.stateprefix);
Dprintf("DEBUG: freeing rehash...\n");
free(ctx.rehashprefix);
/* *********** Begin DEBUG-only statistics *********** */
#ifdef PHC_DEBUG_STATISTICS
printf("********* Statistics **********\n");
double rounds = ctx.inner_rounds * ctx.state_words * ctx.outer_rounds;
printf("Function calls:\n");
for (int i = 0; i < PHS_F_COUNT; i++) {
double usage = (cnt_idx[i] / rounds) * 100;
printf("F[%d]: %07.4lf%% (%" PRIu64 ")\n", i, usage, cnt_idx[i]);
}
printf("State usage as [tgt] addresses: \n");
for (int i = 0; i < ctx.state_words; i++) {
double tgt_usage = (cnt_tgt_addr[i] / rounds) * 100;
printf("[%08.6lf%%] ", tgt_usage);
if (i % 8 == 7) {
printf("\n");
}
}
printf("Memory used: %" PRIu32 " byte, functions called: %0.0lf\n", ctx.state_bytes, rounds);
free(cnt_tgt_addr);
#endif
/* *********** End DEBUG-only statistics *********** */
return 0;
}
//---------------------------------------------------------------------------
// mpi_slaving:
//---------------------------------------------------------------------------
int mpi_slaving()
{
// Declare local variables
MPI_Datatype MPI_SLAVEINF; /* Dataype for MPI communications */
slaveinfo sl_info; /* Information structure for slaves */
MPI_Status *status; /* Recv status handler */
int used_size; /* # of processors used */
long sfN; /* # of pixels in subfield */
float *data = NULL; /* subfield data burst */
float *winH = NULL; /* apodisation window for SR calc. */
float *winF = NULL; /* apodisation window for phase rec. */
float *mask = NULL; /* DiffLim Mask */
float *pc = NULL; /* Phase Consistency */
/* for reallocation: needs to be NULL */
int *shifts = NULL; /* shifts for KT Cross Spectra */
/* for reallocation: needs to be NULL */
int maxk; /* number of shifts */
// Triple correlation part
long *index = NULL; /* index list for bispectrum vectors */
long bs_cnt; /* # of vectors used */
float *bsc = NULL; /* complex non-red/red bispectrum */
float *wc = NULL; /* complex non-red/red bs weights */
float *p1 = NULL; /* phase matrix for iterativ reconstr. */
float *aphs = NULL; /* average of low frequencies */
// General part
float *phs = NULL; /* Phase of reconstructed image */
float *amp = NULL; /* Amplitude of reconstructed image */
int c = GO; /* helpers */
long i;
// set up status variable for sends and receives
status = (MPI_Status *) malloc(sizeof(MPI_Status));
// Set Slaveinfo datatype for MPI sends and receives
mpi_setslavetype(&MPI_SLAVEINF);
// Receive number of jobs ...
MPI_Bcast(&used_size, 1, MPI_INT, 0, MPI_COMM_WORLD);
// ...and if used_size = NOGO, we are quitting the slave!
if (used_size == NOGO) {
// free memory
MPI_Type_free(&MPI_SLAVEINF);
free(status);
// returning NOGO quits the slaves in entry.c
return NOGO;
}
// ...and decide if I am needed
if (used_size > proc_id) {
// work until TAG says NOGO
while (GO) {
// Receive the data information
MPI_Recv(&sl_info, 1, MPI_SLAVEINF, 0, MPI_ANY_TAG, MPI_COMM_WORLD, status);
// Break if shutdown signal was sent
if (status->MPI_TAG == NOGO)
break;
if (status->MPI_TAG == TC) {
/* First time allocation of memory */
if (c) {
// find number of pixels in subfield
sfN = sl_info.sfsizex * sl_info.sfsizey;
// allocate memory for data
data = (float *) malloc(sfN * sl_info.nrofframes * sizeof(float));
winH = (float *) malloc(sfN * sizeof(float));
winF = (float *) malloc(sfN * sizeof(float));
pc = (float *) malloc(sfN * sizeof(float));
/* Initialise hamming window, fractional hamming & mask */
hanming(winH, sl_info.sfsizex, sl_info.sfsizey, 0.5);
frachamming(winF, sl_info.sfsizex, sl_info.sfsizey, sl_info.limApod, 0, NULL);
// mask is no longer used...
mask = ellmask(sl_info.sfsizex, sl_info.sfsizey, NULL, sl_info.rad_x, sl_info.rad_y);
// allocate appropriate memory
index = bs_init(&bs_cnt, sl_info);
bsc = (float *) malloc(2 * bs_cnt * sizeof(float));
wc = (float *) malloc(bs_cnt * sizeof(float));
// Allocate memory for reconstructed amplitudes & phases
amp = (float *) malloc(sfN * sizeof(float));
phs = (float *) malloc(2 * sfN * sizeof(float));
p1 = (float *) malloc(2 * sfN * sizeof(float));
// set flag so as to not allocate new memory later
c = NOGO;
}
// initialise amps, phases & phase consistency to zero
memset(bsc, 0.0, 2 * bs_cnt * sizeof(float));
memset(wc, 0.0, bs_cnt * sizeof(float));
memset(amp, 0.0, sfN * sizeof(float));
memset(phs, 0.0, 2 * sfN * sizeof(float));
memset(p1, 0.0, 2 * sfN * sizeof(float));
memset(pc, 0.0, sfN * sizeof(float));
// finally receive the data
MPI_Recv(data, sfN * sl_info.nrofframes, MPI_FLOAT, 0, MPI_ANY_TAG, MPI_COMM_WORLD, status);
// compute mean of burst
//mean(data, sl_info.sfsizex, sl_info.sfsizey, sl_info.nrofframes, temp);
/* compute the position of the 'good' average phase parts
3 is an argument here because we deleted:
((int) (alpha[0] * i_rad) > 3 ?
(int) (alpha[0] * i_rad) : 3), */
init_shift(sl_info.sfsizex / 2, sl_info.sfsizey / 2, 3, &maxk, &shifts);
// create bi-spectrum/weights in non-redundant matrix
aphs = bs_ave(data, winF, sl_info, index, bs_cnt, bsc, wc, amp, maxk, shifts);
// set snr-threshold
bs_snrt(wc, bs_cnt, &sl_info);
// phase reconstruction
// init phase matrices
phs_init(phs, p1, pc, sl_info, maxk, shifts, aphs);
// recursive approach
rpr(phs, p1, pc, index, bs_cnt, bsc, wc, sl_info);
// iterative approach
for (i = 0; i < sl_info.max_it; i++) {
iwlspr(phs, p1, pc, bsc, wc, index, bs_cnt, sl_info, maxk);
if (chkphase(sl_info, phs) < 1.0e-5)
break;
}
// Send back info, so master knows, which subfield burst this was
// MPI_TAG will indicate whether we are at the end of the process
MPI_Send(&sl_info, 1, MPI_SLAVEINF, 0, NOGO, MPI_COMM_WORLD);
// Send back processed data
MPI_Send(amp, sfN, MPI_FLOAT, 0, NOGO, MPI_COMM_WORLD);
// send back phase
MPI_Send(phs, 2 * sfN, MPI_FLOAT, 0, NOGO, MPI_COMM_WORLD);
// free some memory
free(shifts);
shifts = NULL;
free(aphs);
aphs = NULL;
}
}
// free memory
if (data != NULL)
free(data);
if (winH != NULL)
free(winH);
if (winF != NULL)
free(winF);
if (mask != NULL)
free(mask);
if (pc != NULL)
free(pc);
if (shifts != NULL)
free(shifts);
if (amp != NULL)
free(amp);
if (phs != NULL)
free(phs);
if (index != NULL)
free(index);
if (p1 != NULL)
free(p1);
if (bsc != NULL)
free(bsc);
if (wc != NULL)
free(wc);
free(status);
MPI_Type_free(&MPI_SLAVEINF);
// idle until new data or shutdown Broadcast is sent
return GO;
}
else {
// free memory
free(status);
MPI_Type_free(&MPI_SLAVEINF);
// idle until new data or shutdown Broadcast is sent
return GO;
}
}
