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Merge pull request #1486 from martin-frbg/atomic 

Use _Atomic instead of volatile for thread safety where C11 is supported
tags/v0.3.0^2
Martin Kroeker GitHub 7 years ago
parent
954f1832de 20c6c38e51
commit
802cf6b22d
No known key found for this signature in database GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 709 additions and 11 deletions
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  1. +6
    -1
      driver/level3/level3_gemm3m_thread.c
  2. +6
    -1
      driver/level3/level3_syrk_threaded.c
  3. +6
    -1
      driver/level3/level3_thread.c
  4. +27
    -8
      lapack/getrf/getrf_parallel.c
  5. +664
    -0
      lapack/getrf/potrf_parallel.c

+ 6
- 1
driver/level3/level3_gemm3m_thread.c View File

@@ -91,7 +91,12 @@
#endif

typedef struct {
volatile BLASLONG working[MAX_CPU_NUMBER][CACHE_LINE_SIZE * DIVIDE_RATE];
#if _STDC_VERSION__ >= 201112L
_Atomic
#else
volatile
#endif
BLASLONG working[MAX_CPU_NUMBER][CACHE_LINE_SIZE * DIVIDE_RATE];
} job_t;




+ 6
- 1
driver/level3/level3_syrk_threaded.c View File

@@ -67,7 +67,12 @@
#endif

typedef struct {
volatile BLASLONG working[MAX_CPU_NUMBER][CACHE_LINE_SIZE * DIVIDE_RATE];
#if _STDC_VERSION__ >= 201112L
_Atomic
#else
volatile
#endif
BLASLONG working[MAX_CPU_NUMBER][CACHE_LINE_SIZE * DIVIDE_RATE];
} job_t;




+ 6
- 1
driver/level3/level3_thread.c View File

@@ -91,7 +91,12 @@
#endif

typedef struct {
volatile BLASLONG working[MAX_CPU_NUMBER][CACHE_LINE_SIZE * DIVIDE_RATE];
#if _STDC_VERSION__ >= 201112L
_Atomic
#else
volatile
#endif
BLASLONG working[MAX_CPU_NUMBER][CACHE_LINE_SIZE * DIVIDE_RATE];
} job_t;




+ 27
- 8
lapack/getrf/getrf_parallel.c View File

@@ -119,7 +119,11 @@ static void inner_basic_thread(blas_arg_t *args, BLASLONG *range_m, BLASLONG *ra
FLOAT *d = (FLOAT *)args -> b + (k + k * lda) * COMPSIZE;
FLOAT *sbb = sb;

#if _STDC_VERSION__ >= 201112L
_Atomic BLASLONG *flag = (_Atomic BLASLONG *)args -> d;
#else
volatile BLASLONG *flag = (volatile BLASLONG *)args -> d;
#endif

blasint *ipiv = (blasint *)args -> c;

@@ -197,7 +201,12 @@ static void inner_basic_thread(blas_arg_t *args, BLASLONG *range_m, BLASLONG *ra
/* Non blocking implementation */

typedef struct {
volatile BLASLONG working[MAX_CPU_NUMBER][CACHE_LINE_SIZE * DIVIDE_RATE];
#if _STDC_VERSION__ >= 201112L
_Atomic
#else
volatile
#endif
BLASLONG working[MAX_CPU_NUMBER][CACHE_LINE_SIZE * DIVIDE_RATE];
} job_t;

#define ICOPY_OPERATION(M, N, A, LDA, X, Y, BUFFER) GEMM_ITCOPY(M, N, (FLOAT *)(A) + ((Y) + (X) * (LDA)) * COMPSIZE, LDA, BUFFER);
@@ -236,11 +245,12 @@ static int inner_advanced_thread(blas_arg_t *args, BLASLONG *range_m, BLASLONG *
FLOAT *sbb= sb;

blasint *ipiv = (blasint *)args -> c;

BLASLONG jw;
BLASLONG jw;
#if _STDC_VERSION__ >= 201112L
_Atomic BLASLONG *flag = (_Atomic BLASLONG *)args -> d;
#else
volatile BLASLONG *flag = (volatile BLASLONG *)args -> d;
#endif
if (args -> a == NULL) {
TRSM_ILTCOPY(k, k, (FLOAT *)args -> b, lda, 0, sb);
sbb = (FLOAT *)((((BLASULONG)(sb + k * k * COMPSIZE) + GEMM_ALIGN) & ~GEMM_ALIGN) + GEMM_OFFSET_B);
@@ -442,7 +452,12 @@ blasint CNAME(blas_arg_t *args, BLASLONG *range_m, BLASLONG *range_n, FLOAT *sa,
#ifdef _MSC_VER
BLASLONG flag[MAX_CPU_NUMBER * CACHE_LINE_SIZE];
#else
volatile BLASLONG flag[MAX_CPU_NUMBER * CACHE_LINE_SIZE] __attribute__((aligned(128)));
#if _STDC_VERSION__ >= 201112L
_Atomic
#else
volatile
#endif
BLASLONG flag[MAX_CPU_NUMBER * CACHE_LINE_SIZE] __attribute__((aligned(128)));
#endif

#ifndef COMPLEX
@@ -713,8 +728,12 @@ blasint CNAME(blas_arg_t *args, BLASLONG *range_m, BLASLONG *range_n, FLOAT *sa,
BLASLONG range[MAX_CPU_NUMBER + 1];

BLASLONG width, nn, num_cpu;

volatile BLASLONG flag[MAX_CPU_NUMBER * CACHE_LINE_SIZE] __attribute__((aligned(128)));
#if _STDC_VERSION__ >= 201112L
_Atomic
#else
volatile
#endif
BLASLONG flag[MAX_CPU_NUMBER * CACHE_LINE_SIZE] __attribute__((aligned(128)));

#ifndef COMPLEX
#ifdef XDOUBLE


+ 664
- 0
lapack/getrf/potrf_parallel.c View File

@@ -0,0 +1,664 @@
/*********************************************************************/
/* Copyright 2009, 2010 The University of Texas at Austin. */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or */
/* without modification, are permitted provided that the following */
/* conditions are met: */
/* */
/* 1. Redistributions of source code must retain the above */
/* copyright notice, this list of conditions and the following */
/* disclaimer. */
/* */
/* 2. Redistributions in binary form must reproduce the above */
/* copyright notice, this list of conditions and the following */
/* disclaimer in the documentation and/or other materials */
/* provided with the distribution. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY OF TEXAS AT */
/* AUSTIN ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, */
/* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */
/* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE */
/* DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OF TEXAS AT */
/* AUSTIN OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, */
/* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES */
/* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE */
/* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR */
/* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF */
/* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */
/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT */
/* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE */
/* POSSIBILITY OF SUCH DAMAGE. */
/* */
/* The views and conclusions contained in the software and */
/* documentation are those of the authors and should not be */
/* interpreted as representing official policies, either expressed */
/* or implied, of The University of Texas at Austin. */
/*********************************************************************/

#include <stdio.h>
#include "common.h"

#ifndef USE_SIMPLE_THREADED_LEVEL3

//The array of job_t may overflow the stack.
//Instead, use malloc to alloc job_t.
#if MAX_CPU_NUMBER > BLAS3_MEM_ALLOC_THRESHOLD
#define USE_ALLOC_HEAP
#endif


static FLOAT dm1 = -1.;

#ifndef KERNEL_FUNC
#ifndef LOWER
#define KERNEL_FUNC SYRK_KERNEL_U
#else
#define KERNEL_FUNC SYRK_KERNEL_L
#endif
#endif

#ifndef LOWER
#ifndef COMPLEX
#define TRSM_KERNEL TRSM_KERNEL_LT
#else
#define TRSM_KERNEL TRSM_KERNEL_LC
#endif
#else
#ifndef COMPLEX
#define TRSM_KERNEL TRSM_KERNEL_RN
#else
#define TRSM_KERNEL TRSM_KERNEL_RR
#endif
#endif

#ifndef CACHE_LINE_SIZE
#define CACHE_LINE_SIZE 8
#endif

#ifndef DIVIDE_RATE
#define DIVIDE_RATE 2
#endif

#ifndef SWITCH_RATIO
#define SWITCH_RATIO 2
#endif

#ifndef LOWER
#define TRANS
#endif

#ifndef SYRK_LOCAL
#if !defined(LOWER) && !defined(TRANS)
#define SYRK_LOCAL SYRK_UN
#elif !defined(LOWER) && defined(TRANS)
#define SYRK_LOCAL SYRK_UT
#elif defined(LOWER) && !defined(TRANS)
#define SYRK_LOCAL SYRK_LN
#else
#define SYRK_LOCAL SYRK_LT
#endif
#endif

typedef struct {
#if _STDC_VERSION__ >= 201112L
_Atomic
#else
volatile
#endif
BLASLONG working[MAX_CPU_NUMBER][CACHE_LINE_SIZE * DIVIDE_RATE];
} job_t;


#ifndef KERNEL_OPERATION
#ifndef COMPLEX
#define KERNEL_OPERATION(M, N, K, ALPHA, SA, SB, C, LDC, X, Y) \
KERNEL_FUNC(M, N, K, ALPHA[0], SA, SB, (FLOAT *)(C) + ((X) + (Y) * LDC) * COMPSIZE, LDC, (X) - (Y))
#else
#define KERNEL_OPERATION(M, N, K, ALPHA, SA, SB, C, LDC, X, Y) \
KERNEL_FUNC(M, N, K, ALPHA[0], ALPHA[1], SA, SB, (FLOAT *)(C) + ((X) + (Y) * LDC) * COMPSIZE, LDC, (X) - (Y))
#endif
#endif

#ifndef ICOPY_OPERATION
#ifndef TRANS
#define ICOPY_OPERATION(M, N, A, LDA, X, Y, BUFFER) GEMM_ITCOPY(M, N, (FLOAT *)(A) + ((Y) + (X) * (LDA)) * COMPSIZE, LDA, BUFFER);
#else
#define ICOPY_OPERATION(M, N, A, LDA, X, Y, BUFFER) GEMM_INCOPY(M, N, (FLOAT *)(A) + ((X) + (Y) * (LDA)) * COMPSIZE, LDA, BUFFER);
#endif
#endif

#ifndef OCOPY_OPERATION
#ifdef TRANS
#define OCOPY_OPERATION(M, N, A, LDA, X, Y, BUFFER) GEMM_ONCOPY(M, N, (FLOAT *)(A) + ((X) + (Y) * (LDA)) * COMPSIZE, LDA, BUFFER);
#else
#define OCOPY_OPERATION(M, N, A, LDA, X, Y, BUFFER) GEMM_OTCOPY(M, N, (FLOAT *)(A) + ((Y) + (X) * (LDA)) * COMPSIZE, LDA, BUFFER);
#endif
#endif

#ifndef S
#define S args -> a
#endif
#ifndef A
#define A args -> b
#endif
#ifndef C
#define C args -> c
#endif
#ifndef LDA
#define LDA args -> lda
#endif
#ifndef N
#define N args -> m
#endif
#ifndef K
#define K args -> k
#endif

static int inner_thread(blas_arg_t *args, BLASLONG *range_m, BLASLONG *range_n, FLOAT *sa, FLOAT *sb, BLASLONG mypos){

FLOAT *buffer[DIVIDE_RATE];

BLASLONG k, lda;
BLASLONG m_from, m_to;

FLOAT *alpha;
FLOAT *a, *c;
job_t *job = (job_t *)args -> common;
BLASLONG xxx, bufferside;

BLASLONG jjs, min_jj;
BLASLONG is, min_i, div_n;

BLASLONG i, current;

k = K;

a = (FLOAT *)A;
c = (FLOAT *)C;

lda = LDA;

alpha = (FLOAT *)args -> alpha;

m_from = range_n[mypos + 0];
m_to = range_n[mypos + 1];

#if 0
fprintf(stderr, "Thread[%ld] m_from : %ld m_to : %ld\n", mypos, m_from, m_to);
#endif

div_n = (((m_to - m_from + DIVIDE_RATE - 1) / DIVIDE_RATE + GEMM_UNROLL_MN - 1)/GEMM_UNROLL_MN) * GEMM_UNROLL_MN;

buffer[0] = (FLOAT *)((((BLASULONG)(sb + k * k * COMPSIZE) + GEMM_ALIGN) & ~GEMM_ALIGN) + GEMM_OFFSET_B);
for (i = 1; i < DIVIDE_RATE; i++) {
buffer[i] = buffer[i - 1] + GEMM_Q * div_n * COMPSIZE;
}

#ifndef LOWER
TRSM_IUNCOPY(k, k, (FLOAT *)S, lda, 0, sb);
#else
TRSM_OLTCOPY(k, k, (FLOAT *)S, lda, 0, sb);
#endif

for (xxx = m_from, bufferside = 0; xxx < m_to; xxx += div_n, bufferside ++) {

for(jjs = xxx; jjs < MIN(m_to, xxx + div_n); jjs += min_jj){

min_jj = MIN(m_to, xxx + div_n) - jjs;

#ifndef LOWER
if (min_jj > GEMM_UNROLL_MN) min_jj = GEMM_UNROLL_MN;
#else
if (min_jj > GEMM_P) min_jj = GEMM_P;
#endif

#ifndef LOWER
OCOPY_OPERATION (k, min_jj, a, lda, 0, jjs, buffer[bufferside] + k * (jjs - xxx) * COMPSIZE);

TRSM_KERNEL (k, min_jj, k, dm1,
#ifdef COMPLEX
ZERO,
#endif
sb,
buffer[bufferside] + k * (jjs - xxx) * COMPSIZE,
a + jjs * lda * COMPSIZE, lda, 0);
#else
ICOPY_OPERATION (k, min_jj, a, lda, 0, jjs, buffer[bufferside] + k * (jjs - xxx) * COMPSIZE);

TRSM_KERNEL (min_jj, k, k, dm1,
#ifdef COMPLEX
ZERO,
#endif
buffer[bufferside] + k * (jjs - xxx) * COMPSIZE,
sb,
a + jjs * COMPSIZE, lda, 0);
#endif
}

#ifndef LOWER
for (i = 0; i <= mypos; i++)
job[mypos].working[i][CACHE_LINE_SIZE * bufferside] = (BLASLONG)buffer[bufferside];
#else
for (i = mypos; i < args -> nthreads; i++)
job[mypos].working[i][CACHE_LINE_SIZE * bufferside] = (BLASLONG)buffer[bufferside];
#endif

WMB;
}

min_i = m_to - m_from;

if (min_i >= GEMM_P * 2) {
min_i = GEMM_P;
} else
if (min_i > GEMM_P) {
min_i = (((min_i + 1) / 2 + GEMM_UNROLL_MN - 1)/GEMM_UNROLL_MN) * GEMM_UNROLL_MN;
}

#ifndef LOWER
ICOPY_OPERATION(k, min_i, a, lda, 0, m_from, sa);
#else
OCOPY_OPERATION(k, min_i, a, lda, 0, m_from, sa);
#endif

current = mypos;

#ifndef LOWER
while (current < args -> nthreads)
#else
while (current >= 0)
#endif
{
div_n = (((range_n[current + 1] - range_n[current] + DIVIDE_RATE - 1) / DIVIDE_RATE + GEMM_UNROLL_MN - 1)/GEMM_UNROLL_MN) * GEMM_UNROLL_MN;

for (xxx = range_n[current], bufferside = 0; xxx < range_n[current + 1]; xxx += div_n, bufferside ++) {

/* thread has to wait */
if (current != mypos) while(job[current].working[mypos][CACHE_LINE_SIZE * bufferside] == 0) {YIELDING;};

KERNEL_OPERATION(min_i, MIN(range_n[current + 1] - xxx, div_n), k, alpha,
sa, (FLOAT *)job[current].working[mypos][CACHE_LINE_SIZE * bufferside],
c, lda, m_from, xxx);

if (m_from + min_i >= m_to) {
job[current].working[mypos][CACHE_LINE_SIZE * bufferside] &= 0;
WMB;
}
}

#ifndef LOWER
current ++;
#else
current --;
#endif
}

for(is = m_from + min_i; is < m_to; is += min_i){
min_i = m_to - is;

if (min_i >= GEMM_P * 2) {
min_i = GEMM_P;
} else
if (min_i > GEMM_P) {
min_i = (((min_i + 1) / 2 + GEMM_UNROLL_MN - 1)/GEMM_UNROLL_MN) * GEMM_UNROLL_MN;
}

#ifndef LOWER
ICOPY_OPERATION(k, min_i, a, lda, 0, is, sa);
#else
OCOPY_OPERATION(k, min_i, a, lda, 0, is, sa);
#endif

current = mypos;

#ifndef LOWER
while (current < args -> nthreads)
#else
while (current >= 0)
#endif
{
div_n = (((range_n[current + 1] - range_n[current] + DIVIDE_RATE - 1) / DIVIDE_RATE + GEMM_UNROLL_MN - 1)/GEMM_UNROLL_MN) * GEMM_UNROLL_MN;

for (xxx = range_n[current], bufferside = 0; xxx < range_n[current + 1]; xxx += div_n, bufferside ++) {

KERNEL_OPERATION(min_i, MIN(range_n[current + 1] - xxx, div_n), k, alpha,
sa, (FLOAT *)job[current].working[mypos][CACHE_LINE_SIZE * bufferside],
c, lda, is, xxx);

if (is + min_i >= m_to) {
job[current].working[mypos][CACHE_LINE_SIZE * bufferside] &= 0;
WMB;
}
}
#ifndef LOWER
current ++;
#else
current --;
#endif
}
}

for (i = 0; i < args -> nthreads; i++) {
if (i != mypos) {
for (xxx = 0; xxx < DIVIDE_RATE; xxx++) {
while (job[mypos].working[i][CACHE_LINE_SIZE * xxx] ) {YIELDING;};
}
}
}

return 0;
}

static int thread_driver(blas_arg_t *args, FLOAT *sa, FLOAT *sb){

blas_arg_t newarg;

#ifndef USE_ALLOC_HEAP
job_t job[MAX_CPU_NUMBER];
#else
job_t * job = NULL;
#endif

blas_queue_t queue[MAX_CPU_NUMBER];

BLASLONG range[MAX_CPU_NUMBER + 100];

BLASLONG num_cpu;

BLASLONG nthreads = args -> nthreads;

BLASLONG width, i, j, k;
BLASLONG n, n_from, n_to;
int mode, mask;
double dnum;

#ifndef COMPLEX
#ifdef XDOUBLE
mode = BLAS_XDOUBLE | BLAS_REAL;
mask = MAX(QGEMM_UNROLL_M, QGEMM_UNROLL_N) - 1;
#elif defined(DOUBLE)
mode = BLAS_DOUBLE | BLAS_REAL;
mask = MAX(DGEMM_UNROLL_M, DGEMM_UNROLL_N) - 1;
#else
mode = BLAS_SINGLE | BLAS_REAL;
mask = MAX(SGEMM_UNROLL_M, SGEMM_UNROLL_N) - 1;
#endif
#else
#ifdef XDOUBLE
mode = BLAS_XDOUBLE | BLAS_COMPLEX;
mask = MAX(XGEMM_UNROLL_M, XGEMM_UNROLL_N) - 1;
#elif defined(DOUBLE)
mode = BLAS_DOUBLE | BLAS_COMPLEX;
mask = MAX(ZGEMM_UNROLL_M, ZGEMM_UNROLL_N) - 1;
#else
mode = BLAS_SINGLE | BLAS_COMPLEX;
mask = MAX(CGEMM_UNROLL_M, CGEMM_UNROLL_N) - 1;
#endif
#endif

newarg.m = args -> m;
newarg.k = args -> k;
newarg.a = args -> a;
newarg.b = args -> b;
newarg.c = args -> c;
newarg.lda = args -> lda;
newarg.alpha = args -> alpha;

#ifdef USE_ALLOC_HEAP
job = (job_t*)malloc(MAX_CPU_NUMBER * sizeof(job_t));
if(job==NULL){
fprintf(stderr, "OpenBLAS: malloc failed in %s\n", __func__);
exit(1);
}
#endif

newarg.common = (void *)job;

n_from = 0;
n_to = args -> m;

#ifndef LOWER

range[MAX_CPU_NUMBER] = n_to - n_from;
range[0] = 0;
num_cpu = 0;
i = 0;
n = n_to - n_from;

dnum = (double)n * (double)n /(double)nthreads;

while (i < n){

if (nthreads - num_cpu > 1) {

double di = (double)i;

width = ((((BLASLONG)(sqrt(di * di + dnum) - di) + mask)/(mask+1)) * (mask+1));

if (num_cpu == 0) width = n - (((n - width)/(mask+1)) * (mask+1));

if ((width > n - i) || (width < mask)) width = n - i;

} else {
width = n - i;
}

range[MAX_CPU_NUMBER - num_cpu - 1] = range[MAX_CPU_NUMBER - num_cpu] - width;

queue[num_cpu].mode = mode;
queue[num_cpu].routine = inner_thread;
queue[num_cpu].args = &newarg;
queue[num_cpu].range_m = NULL;

queue[num_cpu].sa = NULL;
queue[num_cpu].sb = NULL;
queue[num_cpu].next = &queue[num_cpu + 1];

num_cpu ++;
i += width;
}

for (i = 0; i < num_cpu; i ++) queue[i].range_n = &range[MAX_CPU_NUMBER - num_cpu];

#else

range[0] = 0;
num_cpu = 0;
i = 0;
n = n_to - n_from;

dnum = (double)n * (double)n /(double)nthreads;

while (i < n){

if (nthreads - num_cpu > 1) {

double di = (double)i;

width = ((((BLASLONG)(sqrt(di * di + dnum) - di) + mask)/(mask+1)) * (mask+1));

if ((width > n - i) || (width < mask)) width = n - i;

} else {
width = n - i;
}

range[num_cpu + 1] = range[num_cpu] + width;

queue[num_cpu].mode = mode;
queue[num_cpu].routine = inner_thread;
queue[num_cpu].args = &newarg;
queue[num_cpu].range_m = NULL;
queue[num_cpu].range_n = range;
queue[num_cpu].sa = NULL;
queue[num_cpu].sb = NULL;
queue[num_cpu].next = &queue[num_cpu + 1];

num_cpu ++;
i += width;
}

#endif

newarg.nthreads = num_cpu;

if (num_cpu) {

for (j = 0; j < num_cpu; j++) {
for (i = 0; i < num_cpu; i++) {
for (k = 0; k < DIVIDE_RATE; k++) {
job[j].working[i][CACHE_LINE_SIZE * k] = 0;
}
}
}

queue[0].sa = sa;
queue[0].sb = sb;
queue[num_cpu - 1].next = NULL;

exec_blas(num_cpu, queue);
}

#ifdef USE_ALLOC_HEAP
free(job);
#endif

return 0;
}

#endif

blasint CNAME(blas_arg_t *args, BLASLONG *range_m, BLASLONG *range_n, FLOAT *sa, FLOAT *sb, BLASLONG myid) {

BLASLONG n, bk, i, blocking, lda;
BLASLONG info;
int mode;
blas_arg_t newarg;
FLOAT *a;
FLOAT alpha[2] = { -ONE, ZERO};

#ifndef COMPLEX
#ifdef XDOUBLE
mode = BLAS_XDOUBLE | BLAS_REAL;
#elif defined(DOUBLE)
mode = BLAS_DOUBLE | BLAS_REAL;
#else
mode = BLAS_SINGLE | BLAS_REAL;
#endif
#else
#ifdef XDOUBLE
mode = BLAS_XDOUBLE | BLAS_COMPLEX;
#elif defined(DOUBLE)
mode = BLAS_DOUBLE | BLAS_COMPLEX;
#else
mode = BLAS_SINGLE | BLAS_COMPLEX;
#endif
#endif

if (args -> nthreads == 1) {
#ifndef LOWER
info = POTRF_U_SINGLE(args, NULL, NULL, sa, sb, 0);
#else
info = POTRF_L_SINGLE(args, NULL, NULL, sa, sb, 0);
#endif
return info;
}

n = args -> n;
a = (FLOAT *)args -> a;
lda = args -> lda;

if (range_n) n = range_n[1] - range_n[0];

if (n <= GEMM_UNROLL_N * 2) {
#ifndef LOWER
info = POTRF_U_SINGLE(args, NULL, range_n, sa, sb, 0);
#else
info = POTRF_L_SINGLE(args, NULL, range_n, sa, sb, 0);
#endif
return info;
}

newarg.lda = lda;
newarg.ldb = lda;
newarg.ldc = lda;
newarg.alpha = alpha;
newarg.beta = NULL;
newarg.nthreads = args -> nthreads;

blocking = ((n / 2 + GEMM_UNROLL_N - 1)/GEMM_UNROLL_N) * GEMM_UNROLL_N;
if (blocking > GEMM_Q) blocking = GEMM_Q;

for (i = 0; i < n; i += blocking) {
bk = n - i;
if (bk > blocking) bk = blocking;

newarg.m = bk;
newarg.n = bk;
newarg.a = a + (i + i * lda) * COMPSIZE;

info = CNAME(&newarg, NULL, NULL, sa, sb, 0);
if (info) return info + i;

if (n - i - bk > 0) {
#ifndef USE_SIMPLE_THREADED_LEVEL3
newarg.m = n - i - bk;
newarg.k = bk;
#ifndef LOWER
newarg.b = a + ( i + (i + bk) * lda) * COMPSIZE;
#else
newarg.b = a + ((i + bk) + i * lda) * COMPSIZE;
#endif
newarg.c = a + ((i + bk) + (i + bk) * lda) * COMPSIZE;

thread_driver(&newarg, sa, sb);
#else

#ifndef LOWER
newarg.m = bk;
newarg.n = n - i - bk;
newarg.a = a + (i + i * lda) * COMPSIZE;
newarg.b = a + (i + (i + bk) * lda) * COMPSIZE;

gemm_thread_n(mode | BLAS_TRANSA_T,
&newarg, NULL, NULL, (void *)TRSM_LCUN, sa, sb, args -> nthreads);

newarg.n = n - i - bk;
newarg.k = bk;
newarg.a = a + ( i + (i + bk) * lda) * COMPSIZE;
newarg.c = a + ((i + bk) + (i + bk) * lda) * COMPSIZE;

#if 0
HERK_THREAD_UC(&newarg, NULL, NULL, sa, sb, 0);
#else
syrk_thread(mode | BLAS_TRANSA_N | BLAS_TRANSB_T,
&newarg, NULL, NULL, (void *)HERK_UC, sa, sb, args -> nthreads);
#endif
#else
newarg.m = n - i - bk;
newarg.n = bk;
newarg.a = a + (i + i * lda) * COMPSIZE;
newarg.b = a + (i + bk + i * lda) * COMPSIZE;

gemm_thread_m(mode | BLAS_RSIDE | BLAS_TRANSA_T | BLAS_UPLO,
&newarg, NULL, NULL, (void *)TRSM_RCLN, sa, sb, args -> nthreads);

newarg.n = n - i - bk;
newarg.k = bk;
newarg.a = a + (i + bk + i * lda) * COMPSIZE;
newarg.c = a + (i + bk + (i + bk) * lda) * COMPSIZE;

#if 0
HERK_THREAD_LN(&newarg, NULL, NULL, sa, sb, 0);
#else
syrk_thread(mode | BLAS_TRANSA_N | BLAS_TRANSB_T | BLAS_UPLO,
&newarg, NULL, NULL, (void *)HERK_LN, sa, sb, args -> nthreads);
#endif
#endif

#endif
}
}
return 0;
}

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