rsCpuCore.cpp revision f5ef8df639ba6363aa5d546e57ce872d04144cb6 
1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "rsCpuCore.h"
18#include "rsCpuScript.h"
19#include "rsCpuScriptGroup.h"
20
21#include <malloc.h>
22#include "rsContext.h"
23
24#include <sys/types.h>
25#include <sys/resource.h>
26#include <sched.h>
27#include <sys/syscall.h>
28#include <string.h>
29#include <unistd.h>
30
31#include <stdio.h>
32#include <stdlib.h>
33#include <fcntl.h>
34
35#if !defined(RS_SERVER) && !defined(RS_COMPATIBILITY_LIB)
36#include <cutils/properties.h>
37#include "utils/StopWatch.h"
38#endif
39
40#ifdef RS_SERVER
41// Android exposes gettid(), standard Linux does not
42static pid_t gettid() {
43    return syscall(SYS_gettid);
44}
45#endif
46
47using namespace android;
48using namespace android::renderscript;
49
50typedef void (*outer_foreach_t)(
51    const android::renderscript::RsForEachStubParamStruct *,
52    uint32_t x1, uint32_t x2,
53    uint32_t instep, uint32_t outstep);
54
55
56static pthread_key_t gThreadTLSKey = 0;
57static uint32_t gThreadTLSKeyCount = 0;
58static pthread_mutex_t gInitMutex = PTHREAD_MUTEX_INITIALIZER;
59
60bool android::renderscript::gArchUseSIMD = false;
61
62RsdCpuReference::~RsdCpuReference() {
63}
64
65RsdCpuReference * RsdCpuReference::create(Context *rsc, uint32_t version_major,
66        uint32_t version_minor, sym_lookup_t lfn, script_lookup_t slfn
67#ifndef RS_COMPATIBILITY_LIB
68        , bcc::RSLinkRuntimeCallback pLinkRuntimeCallback,
69        RSSelectRTCallback pSelectRTCallback
70#endif
71        ) {
72
73    RsdCpuReferenceImpl *cpu = new RsdCpuReferenceImpl(rsc);
74    if (!cpu) {
75        return NULL;
76    }
77    if (!cpu->init(version_major, version_minor, lfn, slfn)) {
78        delete cpu;
79        return NULL;
80    }
81
82#ifndef RS_COMPATIBILITY_LIB
83    cpu->setLinkRuntimeCallback(pLinkRuntimeCallback);
84    cpu->setSelectRTCallback(pSelectRTCallback);
85#endif
86
87    return cpu;
88}
89
90
91Context * RsdCpuReference::getTlsContext() {
92    ScriptTLSStruct * tls = (ScriptTLSStruct *)pthread_getspecific(gThreadTLSKey);
93    return tls->mContext;
94}
95
96const Script * RsdCpuReference::getTlsScript() {
97    ScriptTLSStruct * tls = (ScriptTLSStruct *)pthread_getspecific(gThreadTLSKey);
98    return tls->mScript;
99}
100
101pthread_key_t RsdCpuReference::getThreadTLSKey(){ return gThreadTLSKey; }
102
103////////////////////////////////////////////////////////////
104///
105
106RsdCpuReferenceImpl::RsdCpuReferenceImpl(Context *rsc) {
107    mRSC = rsc;
108
109    version_major = 0;
110    version_minor = 0;
111    mInForEach = false;
112    memset(&mWorkers, 0, sizeof(mWorkers));
113    memset(&mTlsStruct, 0, sizeof(mTlsStruct));
114    mExit = false;
115#ifndef RS_COMPATIBILITY_LIB
116    mLinkRuntimeCallback = NULL;
117    mSelectRTCallback = NULL;
118#endif
119}
120
121
122void * RsdCpuReferenceImpl::helperThreadProc(void *vrsc) {
123    RsdCpuReferenceImpl *dc = (RsdCpuReferenceImpl *)vrsc;
124
125    uint32_t idx = __sync_fetch_and_add(&dc->mWorkers.mLaunchCount, 1);
126
127    //ALOGV("RS helperThread starting %p idx=%i", dc, idx);
128
129    dc->mWorkers.mLaunchSignals[idx].init();
130    dc->mWorkers.mNativeThreadId[idx] = gettid();
131
132    memset(&dc->mTlsStruct, 0, sizeof(dc->mTlsStruct));
133    int status = pthread_setspecific(gThreadTLSKey, &dc->mTlsStruct);
134    if (status) {
135        ALOGE("pthread_setspecific %i", status);
136    }
137
138#if 0
139    typedef struct {uint64_t bits[1024 / 64]; } cpu_set_t;
140    cpu_set_t cpuset;
141    memset(&cpuset, 0, sizeof(cpuset));
142    cpuset.bits[idx / 64] |= 1ULL << (idx % 64);
143    int ret = syscall(241, rsc->mWorkers.mNativeThreadId[idx],
144              sizeof(cpuset), &cpuset);
145    ALOGE("SETAFFINITY ret = %i %s", ret, EGLUtils::strerror(ret));
146#endif
147
148    while (!dc->mExit) {
149        dc->mWorkers.mLaunchSignals[idx].wait();
150        if (dc->mWorkers.mLaunchCallback) {
151           // idx +1 is used because the calling thread is always worker 0.
152           dc->mWorkers.mLaunchCallback(dc->mWorkers.mLaunchData, idx+1);
153        }
154        __sync_fetch_and_sub(&dc->mWorkers.mRunningCount, 1);
155        dc->mWorkers.mCompleteSignal.set();
156    }
157
158    //ALOGV("RS helperThread exited %p idx=%i", dc, idx);
159    return NULL;
160}
161
162void RsdCpuReferenceImpl::launchThreads(WorkerCallback_t cbk, void *data) {
163    mWorkers.mLaunchData = data;
164    mWorkers.mLaunchCallback = cbk;
165
166    // fast path for very small launches
167    MTLaunchStruct *mtls = (MTLaunchStruct *)data;
168    if (mtls && mtls->fep.dimY <= 1 && mtls->xEnd <= mtls->xStart + mtls->mSliceSize) {
169        if (mWorkers.mLaunchCallback) {
170            mWorkers.mLaunchCallback(mWorkers.mLaunchData, 0);
171        }
172        return;
173    }
174
175    mWorkers.mRunningCount = mWorkers.mCount;
176    __sync_synchronize();
177
178    for (uint32_t ct = 0; ct < mWorkers.mCount; ct++) {
179        mWorkers.mLaunchSignals[ct].set();
180    }
181
182    // We use the calling thread as one of the workers so we can start without
183    // the delay of the thread wakeup.
184    if (mWorkers.mLaunchCallback) {
185        mWorkers.mLaunchCallback(mWorkers.mLaunchData, 0);
186    }
187
188    while (__sync_fetch_and_or(&mWorkers.mRunningCount, 0) != 0) {
189        mWorkers.mCompleteSignal.wait();
190    }
191}
192
193
194void RsdCpuReferenceImpl::lockMutex() {
195    pthread_mutex_lock(&gInitMutex);
196}
197
198void RsdCpuReferenceImpl::unlockMutex() {
199    pthread_mutex_unlock(&gInitMutex);
200}
201
202#if defined(ARCH_ARM_HAVE_VFP)
203static int
204read_file(const char*  pathname, char*  buffer, size_t  buffsize)
205{
206    int  fd, len;
207
208    fd = open(pathname, O_RDONLY);
209    if (fd < 0)
210        return -1;
211
212    do {
213        len = read(fd, buffer, buffsize);
214    } while (len < 0 && errno == EINTR);
215
216    close(fd);
217
218    return len;
219}
220
221static void GetCpuInfo() {
222    char cpuinfo[4096];
223    int  cpuinfo_len;
224
225    cpuinfo_len = read_file("/proc/cpuinfo", cpuinfo, sizeof cpuinfo);
226    if (cpuinfo_len < 0)  /* should not happen */ {
227        return;
228    }
229
230    gArchUseSIMD = !!strstr(cpuinfo, " neon");
231}
232#endif // ARCH_ARM_HAVE_VFP
233
234bool RsdCpuReferenceImpl::init(uint32_t version_major, uint32_t version_minor,
235                               sym_lookup_t lfn, script_lookup_t slfn) {
236
237    mSymLookupFn = lfn;
238    mScriptLookupFn = slfn;
239
240    lockMutex();
241    if (!gThreadTLSKeyCount) {
242        int status = pthread_key_create(&gThreadTLSKey, NULL);
243        if (status) {
244            ALOGE("Failed to init thread tls key.");
245            unlockMutex();
246            return false;
247        }
248    }
249    gThreadTLSKeyCount++;
250    unlockMutex();
251
252    mTlsStruct.mContext = mRSC;
253    mTlsStruct.mScript = NULL;
254    int status = pthread_setspecific(gThreadTLSKey, &mTlsStruct);
255    if (status) {
256        ALOGE("pthread_setspecific %i", status);
257    }
258
259#if defined(ARCH_ARM_HAVE_VFP)
260    GetCpuInfo();
261#endif
262
263    int cpu = sysconf(_SC_NPROCESSORS_ONLN);
264    if(mRSC->props.mDebugMaxThreads) {
265        cpu = mRSC->props.mDebugMaxThreads;
266    }
267    if (cpu < 2) {
268        mWorkers.mCount = 0;
269        return true;
270    }
271
272    // Subtract one from the cpu count because we also use the command thread as a worker.
273    mWorkers.mCount = (uint32_t)(cpu - 1);
274
275    ALOGV("%p Launching thread(s), CPUs %i", mRSC, mWorkers.mCount + 1);
276
277    mWorkers.mThreadId = (pthread_t *) calloc(mWorkers.mCount, sizeof(pthread_t));
278    mWorkers.mNativeThreadId = (pid_t *) calloc(mWorkers.mCount, sizeof(pid_t));
279    mWorkers.mLaunchSignals = new Signal[mWorkers.mCount];
280    mWorkers.mLaunchCallback = NULL;
281
282    mWorkers.mCompleteSignal.init();
283
284    mWorkers.mRunningCount = mWorkers.mCount;
285    mWorkers.mLaunchCount = 0;
286    __sync_synchronize();
287
288    pthread_attr_t threadAttr;
289    status = pthread_attr_init(&threadAttr);
290    if (status) {
291        ALOGE("Failed to init thread attribute.");
292        return false;
293    }
294
295    for (uint32_t ct=0; ct < mWorkers.mCount; ct++) {
296        status = pthread_create(&mWorkers.mThreadId[ct], &threadAttr, helperThreadProc, this);
297        if (status) {
298            mWorkers.mCount = ct;
299            ALOGE("Created fewer than expected number of RS threads.");
300            break;
301        }
302    }
303    while (__sync_fetch_and_or(&mWorkers.mRunningCount, 0) != 0) {
304        usleep(100);
305    }
306
307    pthread_attr_destroy(&threadAttr);
308    return true;
309}
310
311
312void RsdCpuReferenceImpl::setPriority(int32_t priority) {
313    for (uint32_t ct=0; ct < mWorkers.mCount; ct++) {
314        setpriority(PRIO_PROCESS, mWorkers.mNativeThreadId[ct], priority);
315    }
316}
317
318RsdCpuReferenceImpl::~RsdCpuReferenceImpl() {
319    mExit = true;
320    mWorkers.mLaunchData = NULL;
321    mWorkers.mLaunchCallback = NULL;
322    mWorkers.mRunningCount = mWorkers.mCount;
323    __sync_synchronize();
324    for (uint32_t ct = 0; ct < mWorkers.mCount; ct++) {
325        mWorkers.mLaunchSignals[ct].set();
326    }
327    void *res;
328    for (uint32_t ct = 0; ct < mWorkers.mCount; ct++) {
329        pthread_join(mWorkers.mThreadId[ct], &res);
330    }
331    rsAssert(__sync_fetch_and_or(&mWorkers.mRunningCount, 0) == 0);
332
333    // Global structure cleanup.
334    lockMutex();
335    --gThreadTLSKeyCount;
336    if (!gThreadTLSKeyCount) {
337        pthread_key_delete(gThreadTLSKey);
338    }
339    unlockMutex();
340
341}
342
343typedef void (*rs_t)(const void *, void *, const void *, uint32_t, uint32_t, uint32_t, uint32_t);
344
345static void wc_xy(void *usr, uint32_t idx) {
346    MTLaunchStruct *mtls = (MTLaunchStruct *)usr;
347    RsForEachStubParamStruct p;
348    memcpy(&p, &mtls->fep, sizeof(p));
349    p.lid = idx;
350    uint32_t sig = mtls->sig;
351
352    outer_foreach_t fn = (outer_foreach_t) mtls->kernel;
353    while (1) {
354        uint32_t slice = (uint32_t)__sync_fetch_and_add(&mtls->mSliceNum, 1);
355        uint32_t yStart = mtls->yStart + slice * mtls->mSliceSize;
356        uint32_t yEnd = yStart + mtls->mSliceSize;
357        yEnd = rsMin(yEnd, mtls->yEnd);
358        if (yEnd <= yStart) {
359            return;
360        }
361
362        //ALOGE("usr idx %i, x %i,%i  y %i,%i", idx, mtls->xStart, mtls->xEnd, yStart, yEnd);
363        //ALOGE("usr ptr in %p,  out %p", mtls->fep.ptrIn, mtls->fep.ptrOut);
364
365        for (p.y = yStart; p.y < yEnd; p.y++) {
366            p.out = mtls->fep.ptrOut + (mtls->fep.yStrideOut * p.y) +
367                    (mtls->fep.eStrideOut * mtls->xStart);
368            p.in = mtls->fep.ptrIn + (mtls->fep.yStrideIn * p.y) +
369                   (mtls->fep.eStrideIn * mtls->xStart);
370            fn(&p, mtls->xStart, mtls->xEnd, mtls->fep.eStrideIn, mtls->fep.eStrideOut);
371        }
372    }
373}
374
375static void wc_x(void *usr, uint32_t idx) {
376    MTLaunchStruct *mtls = (MTLaunchStruct *)usr;
377    RsForEachStubParamStruct p;
378    memcpy(&p, &mtls->fep, sizeof(p));
379    p.lid = idx;
380    uint32_t sig = mtls->sig;
381
382    outer_foreach_t fn = (outer_foreach_t) mtls->kernel;
383    while (1) {
384        uint32_t slice = (uint32_t)__sync_fetch_and_add(&mtls->mSliceNum, 1);
385        uint32_t xStart = mtls->xStart + slice * mtls->mSliceSize;
386        uint32_t xEnd = xStart + mtls->mSliceSize;
387        xEnd = rsMin(xEnd, mtls->xEnd);
388        if (xEnd <= xStart) {
389            return;
390        }
391
392        //ALOGE("usr slice %i idx %i, x %i,%i", slice, idx, xStart, xEnd);
393        //ALOGE("usr ptr in %p,  out %p", mtls->fep.ptrIn, mtls->fep.ptrOut);
394
395        p.out = mtls->fep.ptrOut + (mtls->fep.eStrideOut * xStart);
396        p.in = mtls->fep.ptrIn + (mtls->fep.eStrideIn * xStart);
397        fn(&p, xStart, xEnd, mtls->fep.eStrideIn, mtls->fep.eStrideOut);
398    }
399}
400
401void RsdCpuReferenceImpl::launchThreads(const Allocation * ain, Allocation * aout,
402                                     const RsScriptCall *sc, MTLaunchStruct *mtls) {
403
404    //android::StopWatch kernel_time("kernel time");
405
406    if ((mWorkers.mCount >= 1) && mtls->isThreadable && !mInForEach) {
407        const size_t targetByteChunk = 16 * 1024;
408        mInForEach = true;
409        if (mtls->fep.dimY > 1) {
410            uint32_t s1 = mtls->fep.dimY / ((mWorkers.mCount + 1) * 4);
411            uint32_t s2 = 0;
412
413            // This chooses our slice size to rate limit atomic ops to
414            // one per 16k bytes of reads/writes.
415            if (mtls->fep.yStrideOut) {
416                s2 = targetByteChunk / mtls->fep.yStrideOut;
417            } else {
418                s2 = targetByteChunk / mtls->fep.yStrideIn;
419            }
420            mtls->mSliceSize = rsMin(s1, s2);
421
422            if(mtls->mSliceSize < 1) {
423                mtls->mSliceSize = 1;
424            }
425
426         //   mtls->mSliceSize = 2;
427            launchThreads(wc_xy, mtls);
428        } else {
429            uint32_t s1 = mtls->fep.dimX / ((mWorkers.mCount + 1) * 4);
430            uint32_t s2 = 0;
431
432            // This chooses our slice size to rate limit atomic ops to
433            // one per 16k bytes of reads/writes.
434            if (mtls->fep.eStrideOut) {
435                s2 = targetByteChunk / mtls->fep.eStrideOut;
436            } else {
437                s2 = targetByteChunk / mtls->fep.eStrideIn;
438            }
439            mtls->mSliceSize = rsMin(s1, s2);
440
441            if(mtls->mSliceSize < 1) {
442                mtls->mSliceSize = 1;
443            }
444
445            launchThreads(wc_x, mtls);
446        }
447        mInForEach = false;
448
449        //ALOGE("launch 1");
450    } else {
451        RsForEachStubParamStruct p;
452        memcpy(&p, &mtls->fep, sizeof(p));
453        uint32_t sig = mtls->sig;
454
455        //ALOGE("launch 3");
456        outer_foreach_t fn = (outer_foreach_t) mtls->kernel;
457        for (p.ar[0] = mtls->arrayStart; p.ar[0] < mtls->arrayEnd; p.ar[0]++) {
458            for (p.z = mtls->zStart; p.z < mtls->zEnd; p.z++) {
459                for (p.y = mtls->yStart; p.y < mtls->yEnd; p.y++) {
460                    uint32_t offset = mtls->fep.dimY * mtls->fep.dimZ * p.ar[0] +
461                                      mtls->fep.dimY * p.z + p.y;
462                    p.out = mtls->fep.ptrOut + (mtls->fep.yStrideOut * offset) +
463                            (mtls->fep.eStrideOut * mtls->xStart);
464                    p.in = mtls->fep.ptrIn + (mtls->fep.yStrideIn * offset) +
465                           (mtls->fep.eStrideIn * mtls->xStart);
466                    fn(&p, mtls->xStart, mtls->xEnd, mtls->fep.eStrideIn, mtls->fep.eStrideOut);
467                }
468            }
469        }
470    }
471}
472
473RsdCpuScriptImpl * RsdCpuReferenceImpl::setTLS(RsdCpuScriptImpl *sc) {
474    //ALOGE("setTls %p", sc);
475    ScriptTLSStruct * tls = (ScriptTLSStruct *)pthread_getspecific(gThreadTLSKey);
476    rsAssert(tls);
477    RsdCpuScriptImpl *old = tls->mImpl;
478    tls->mImpl = sc;
479    tls->mContext = mRSC;
480    if (sc) {
481        tls->mScript = sc->getScript();
482    } else {
483        tls->mScript = NULL;
484    }
485    return old;
486}
487
488const RsdCpuReference::CpuSymbol * RsdCpuReferenceImpl::symLookup(const char *name) {
489    return mSymLookupFn(mRSC, name);
490}
491
492
493RsdCpuReference::CpuScript * RsdCpuReferenceImpl::createScript(const ScriptC *s,
494                                    char const *resName, char const *cacheDir,
495                                    uint8_t const *bitcode, size_t bitcodeSize,
496                                    uint32_t flags) {
497
498    RsdCpuScriptImpl *i = new RsdCpuScriptImpl(this, s);
499    if (!i->init(resName, cacheDir, bitcode, bitcodeSize, flags)) {
500        delete i;
501        return NULL;
502    }
503    return i;
504}
505
506extern RsdCpuScriptImpl * rsdIntrinsic_3DLUT(RsdCpuReferenceImpl *ctx,
507                                             const Script *s, const Element *e);
508extern RsdCpuScriptImpl * rsdIntrinsic_Convolve3x3(RsdCpuReferenceImpl *ctx,
509                                                   const Script *s, const Element *e);
510extern RsdCpuScriptImpl * rsdIntrinsic_ColorMatrix(RsdCpuReferenceImpl *ctx,
511                                                   const Script *s, const Element *e);
512extern RsdCpuScriptImpl * rsdIntrinsic_LUT(RsdCpuReferenceImpl *ctx,
513                                           const Script *s, const Element *e);
514extern RsdCpuScriptImpl * rsdIntrinsic_Convolve5x5(RsdCpuReferenceImpl *ctx,
515                                                   const Script *s, const Element *e);
516extern RsdCpuScriptImpl * rsdIntrinsic_Blur(RsdCpuReferenceImpl *ctx,
517                                            const Script *s, const Element *e);
518extern RsdCpuScriptImpl * rsdIntrinsic_YuvToRGB(RsdCpuReferenceImpl *ctx,
519                                                const Script *s, const Element *e);
520extern RsdCpuScriptImpl * rsdIntrinsic_Blend(RsdCpuReferenceImpl *ctx,
521                                             const Script *s, const Element *e);
522
523RsdCpuReference::CpuScript * RsdCpuReferenceImpl::createIntrinsic(const Script *s,
524                                    RsScriptIntrinsicID iid, Element *e) {
525
526    RsdCpuScriptImpl *i = NULL;
527    switch (iid) {
528    case RS_SCRIPT_INTRINSIC_ID_3DLUT:
529        i = rsdIntrinsic_3DLUT(this, s, e);
530        break;
531    case RS_SCRIPT_INTRINSIC_ID_CONVOLVE_3x3:
532        i = rsdIntrinsic_Convolve3x3(this, s, e);
533        break;
534    case RS_SCRIPT_INTRINSIC_ID_COLOR_MATRIX:
535        i = rsdIntrinsic_ColorMatrix(this, s, e);
536        break;
537    case RS_SCRIPT_INTRINSIC_ID_LUT:
538        i = rsdIntrinsic_LUT(this, s, e);
539        break;
540    case RS_SCRIPT_INTRINSIC_ID_CONVOLVE_5x5:
541        i = rsdIntrinsic_Convolve5x5(this, s, e);
542        break;
543    case RS_SCRIPT_INTRINSIC_ID_BLUR:
544        i = rsdIntrinsic_Blur(this, s, e);
545        break;
546    case RS_SCRIPT_INTRINSIC_ID_YUV_TO_RGB:
547        i = rsdIntrinsic_YuvToRGB(this, s, e);
548        break;
549    case RS_SCRIPT_INTRINSIC_ID_BLEND:
550        i = rsdIntrinsic_Blend(this, s, e);
551        break;
552
553    default:
554        rsAssert(0);
555    }
556
557    return i;
558}
559
560RsdCpuReference::CpuScriptGroup * RsdCpuReferenceImpl::createScriptGroup(const ScriptGroup *sg) {
561    CpuScriptGroupImpl *sgi = new CpuScriptGroupImpl(this, sg);
562    if (!sgi->init()) {
563        delete sgi;
564        return NULL;
565    }
566    return sgi;
567}
568
569
570