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comparison src/gpu/hsail/vm/gpu_hsail_Tlab.hpp @ 16668:f1d1ec9bcf24

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HSAIL: reset TLAB in donor thread to detect allocation in donor while kernel was active Contributed-by: Tom Deneau <tom.deneau@amd.com>
author Doug Simon <doug.simon@oracle.com>
date Thu, 31 Jul 2014 17:53:06 +0200
parents 06eedda53e14
children a29e6e7b7a86
comparison
equal deleted inserted replaced
16667:1d4313c3ab38 16668:f1d1ec9bcf24
136 136
137 // extract the necessary tlab fields into a TlabInfo record 137 // extract the necessary tlab fields into a TlabInfo record
138 HSAILTlabInfo* pTlabInfo = &_tlab_infos_pool_start[i]; 138 HSAILTlabInfo* pTlabInfo = &_tlab_infos_pool_start[i];
139 _cur_tlab_infos[i] = pTlabInfo; 139 _cur_tlab_infos[i] = pTlabInfo;
140 pTlabInfo->initialize(tlab->start(), tlab->top(), tlab->end(), donorThread, this); 140 pTlabInfo->initialize(tlab->start(), tlab->top(), tlab->end(), donorThread, this);
141
142 // reset the real tlab fields to zero so we are sure the thread doesn't use it
143 tlab->set_start(NULL);
144 tlab->set_top(NULL);
145 tlab->set_pf_top(NULL);
146 tlab->set_end(NULL);
141 } 147 }
142 } 148 }
143 149
144 ~HSAILAllocationInfo() { 150 ~HSAILAllocationInfo() {
145 FREE_C_HEAP_ARRAY(HSAILTlabInfo*, _cur_tlab_infos, mtInternal); 151 FREE_C_HEAP_ARRAY(HSAILTlabInfo*, _cur_tlab_infos, mtInternal);
180 tty->print_cr("tlabInfo %p (donorThread = %p) overflowed by %ld bytes, setting last good top to %p", tlabInfo, donorThread, overflowAmount, tlabInfo->last_good_top()); 186 tty->print_cr("tlabInfo %p (donorThread = %p) overflowed by %ld bytes, setting last good top to %p", tlabInfo, donorThread, overflowAmount, tlabInfo->last_good_top());
181 } 187 }
182 tlabInfo->_top = tlabInfo->last_good_top(); 188 tlabInfo->_top = tlabInfo->last_good_top();
183 } 189 }
184 190
191 // if the donor thread allocated anything while we were running
192 // we will retire its tlab before overwriting with our new one
193 if (tlab->top() != NULL) {
194 if (TraceGPUInteraction) {
195 tty->print("Donor Thread allocated new tlab");
196 printTlabInfoFromThread(tlab);
197 }
198 tlab->make_parsable(true);
199 }
200
185 // fill the donor thread tlab with the tlabInfo information 201 // fill the donor thread tlab with the tlabInfo information
186 // we do this even if it will get overwritten by a later tlabinfo 202 // we do this even if it will get overwritten by a later tlabinfo
187 // because it helps with tlab statistics for that donor thread 203 // because it helps with tlab statistics for that donor thread
188 tlab->fill(tlabInfo->start(), tlabInfo->top(), (tlabInfo->end() - tlabInfo->start()) + tlab->alignment_reserve()); 204 tlab->fill(tlabInfo->start(), tlabInfo->top(), (tlabInfo->end() - tlabInfo->start()) + tlab->alignment_reserve());
189 205