#include <algorithm>
#include <map>
#include <stack>
+#include <math.h>
#include "aco_ir.h"
#include "vulkan/radv_shader.h"
event_gds_gpr_lock = 1 << 9,
event_vmem_gpr_lock = 1 << 10,
event_sendmsg = 1 << 11,
+ num_events = 12,
};
enum counter_type : uint8_t {
counter_lgkm = 1 << 1,
counter_vm = 1 << 2,
counter_vs = 1 << 3,
+ num_counters = 4,
};
static const uint16_t exp_events = event_exp_pos | event_exp_param | event_exp_mrt_null | event_gds_gpr_lock | event_vmem_gpr_lock;
}
}
+uint16_t get_events_for_counter(counter_type ctr)
+{
+ switch (ctr) {
+ case counter_exp:
+ return exp_events;
+ case counter_lgkm:
+ return lgkm_events;
+ case counter_vm:
+ return vm_events;
+ case counter_vs:
+ return vs_events;
+ }
+ return 0;
+}
+
struct wait_imm {
static const uint8_t unset_counter = 0xff;
uint8_t counters; /* use counter_type notion */
bool wait_on_read:1;
bool logical:1;
+ bool has_vmem_nosampler:1;
+ bool has_vmem_sampler:1;
wait_entry(wait_event event, wait_imm imm, bool logical, bool wait_on_read)
: imm(imm), events(event), counters(get_counters_for_event(event)),
- wait_on_read(wait_on_read), logical(logical) {}
+ wait_on_read(wait_on_read), logical(logical),
+ has_vmem_nosampler(false), has_vmem_sampler(false) {}
bool join(const wait_entry& other)
{
bool changed = (other.events & ~events) ||
(other.counters & ~counters) ||
- (other.wait_on_read && !wait_on_read);
+ (other.wait_on_read && !wait_on_read) ||
+ (other.has_vmem_nosampler && !has_vmem_nosampler) ||
+ (other.has_vmem_sampler && !has_vmem_sampler);
events |= other.events;
counters |= other.counters;
changed |= imm.combine(other.imm);
- wait_on_read = wait_on_read || other.wait_on_read;
+ wait_on_read |= other.wait_on_read;
+ has_vmem_nosampler |= other.has_vmem_nosampler;
+ has_vmem_sampler |= other.has_vmem_sampler;
assert(logical == other.logical);
return changed;
}
if (counter == counter_vm) {
imm.vm = wait_imm::unset_counter;
events &= ~event_vmem;
+ has_vmem_nosampler = false;
+ has_vmem_sampler = false;
}
if (counter == counter_exp) {
std::map<PhysReg,wait_entry> gpr_map;
+ /* used for vmem/smem scores */
+ bool collect_statistics;
+ Instruction *gen_instr;
+ std::map<Instruction *, unsigned> unwaited_instrs[num_counters];
+ std::map<PhysReg,std::set<Instruction *>> reg_instrs[num_counters];
+ std::vector<unsigned> wait_distances[num_events];
+
wait_ctx() {}
wait_ctx(Program *program_)
: program(program_),
barrier_events[i] |= other->barrier_events[i];
}
+ /* these are used for statistics, so don't update "changed" */
+ for (unsigned i = 0; i < num_counters; i++) {
+ for (std::pair<Instruction *, unsigned> instr : other->unwaited_instrs[i]) {
+ auto pos = unwaited_instrs[i].find(instr.first);
+ if (pos == unwaited_instrs[i].end())
+ unwaited_instrs[i].insert(instr);
+ else
+ pos->second = std::min(pos->second, instr.second);
+ }
+ /* don't use a foreach loop to avoid copies */
+ for (auto it = other->reg_instrs[i].begin(); it != other->reg_instrs[i].end(); ++it)
+ reg_instrs[i][it->first].insert(it->second.begin(), it->second.end());
+ }
+
return changed;
}
+
+ void wait_and_remove_from_entry(PhysReg reg, wait_entry& entry, counter_type counter) {
+ if (collect_statistics && (entry.counters & counter)) {
+ unsigned counter_idx = ffs(counter) - 1;
+ for (Instruction *instr : reg_instrs[counter_idx][reg]) {
+ auto pos = unwaited_instrs[counter_idx].find(instr);
+ if (pos == unwaited_instrs[counter_idx].end())
+ continue;
+
+ unsigned distance = pos->second;
+ unsigned events = entry.events & get_events_for_counter(counter);
+ while (events) {
+ unsigned event_idx = u_bit_scan(&events);
+ wait_distances[event_idx].push_back(distance);
+ }
+
+ unwaited_instrs[counter_idx].erase(instr);
+ }
+ reg_instrs[counter_idx][reg].clear();
+ }
+
+ entry.remove_counter(counter);
+ }
+
+ void advance_unwaited_instrs()
+ {
+ for (unsigned i = 0; i < num_counters; i++) {
+ for (auto it = unwaited_instrs[i].begin(); it != unwaited_instrs[i].end(); ++it)
+ it->second++;
+ }
+ }
};
wait_imm check_instr(Instruction* instr, wait_ctx& ctx)
continue;
/* Vector Memory reads and writes return in the order they were issued */
- if (instr->isVMEM() && ((it->second.events & vm_events) == event_vmem)) {
- it->second.remove_counter(counter_vm);
- if (!it->second.counters)
- it = ctx.gpr_map.erase(it);
+ bool has_sampler = instr->format == Format::MIMG && !instr->operands[1].isUndefined() && instr->operands[1].regClass() == s4;
+ if (instr->isVMEM() && ((it->second.events & vm_events) == event_vmem) &&
+ it->second.has_vmem_nosampler == !has_sampler && it->second.has_vmem_sampler == has_sampler)
continue;
- }
/* LDS reads and writes return in the order they were issued. same for GDS */
if (instr->format == Format::DS) {
bool gds = static_cast<DS_instruction*>(instr)->gds;
- if ((it->second.events & lgkm_events) == (gds ? event_gds : event_lds)) {
- it->second.remove_counter(counter_lgkm);
- if (!it->second.counters)
- it = ctx.gpr_map.erase(it);
+ if ((it->second.events & lgkm_events) == (gds ? event_gds : event_lds))
continue;
- }
}
wait.combine(it->second.imm);
imm.lgkm = 0;
}
- if (ctx.chip_class >= GFX10) {
+ if (ctx.chip_class >= GFX10 && instr->format == Format::SMEM) {
/* GFX10: A store followed by a load at the same address causes a problem because
* the load doesn't load the correct values unless we wait for the store first.
* This is NOT mitigated by an s_nop.
}
if (instr->format == Format::PSEUDO_BARRIER) {
- uint32_t workgroup_size = UINT32_MAX;
- if (ctx.program->stage & sw_cs) {
- unsigned* bsize = ctx.program->info->cs.block_size;
- workgroup_size = bsize[0] * bsize[1] * bsize[2];
- }
switch (instr->opcode) {
case aco_opcode::p_memory_barrier_common:
imm.combine(ctx.barrier_imm[ffs(barrier_atomic) - 1]);
imm.combine(ctx.barrier_imm[ffs(barrier_buffer) - 1]);
imm.combine(ctx.barrier_imm[ffs(barrier_image) - 1]);
- if (workgroup_size > ctx.program->wave_size)
+ if (ctx.program->workgroup_size > ctx.program->wave_size)
imm.combine(ctx.barrier_imm[ffs(barrier_shared) - 1]);
break;
case aco_opcode::p_memory_barrier_atomic:
imm.combine(ctx.barrier_imm[ffs(barrier_image) - 1]);
break;
case aco_opcode::p_memory_barrier_shared:
- if (workgroup_size > ctx.program->wave_size)
+ if (ctx.program->workgroup_size > ctx.program->wave_size)
imm.combine(ctx.barrier_imm[ffs(barrier_shared) - 1]);
break;
case aco_opcode::p_memory_barrier_gs_data:
while (it != ctx.gpr_map.end())
{
if (imm.exp != wait_imm::unset_counter && imm.exp <= it->second.imm.exp)
- it->second.remove_counter(counter_exp);
+ ctx.wait_and_remove_from_entry(it->first, it->second, counter_exp);
if (imm.vm != wait_imm::unset_counter && imm.vm <= it->second.imm.vm)
- it->second.remove_counter(counter_vm);
+ ctx.wait_and_remove_from_entry(it->first, it->second, counter_vm);
if (imm.lgkm != wait_imm::unset_counter && imm.lgkm <= it->second.imm.lgkm)
- it->second.remove_counter(counter_lgkm);
- if (imm.lgkm != wait_imm::unset_counter && imm.vs <= it->second.imm.vs)
- it->second.remove_counter(counter_vs);
+ ctx.wait_and_remove_from_entry(it->first, it->second, counter_lgkm);
+ if (imm.vs != wait_imm::unset_counter && imm.vs <= it->second.imm.vs)
+ ctx.wait_and_remove_from_entry(it->first, it->second, counter_vs);
if (!it->second.counters)
it = ctx.gpr_map.erase(it);
else
ctx.pending_flat_vm = true;
}
-void insert_wait_entry(wait_ctx& ctx, PhysReg reg, RegClass rc, wait_event event, bool wait_on_read)
+void insert_wait_entry(wait_ctx& ctx, PhysReg reg, RegClass rc, wait_event event, bool wait_on_read,
+ bool has_sampler=false)
{
uint16_t counters = get_counters_for_event(event);
wait_imm imm;
imm.vs = 0;
wait_entry new_entry(event, imm, !rc.is_linear(), wait_on_read);
+ new_entry.has_vmem_nosampler = (event & event_vmem) && !has_sampler;
+ new_entry.has_vmem_sampler = (event & event_vmem) && has_sampler;
for (unsigned i = 0; i < rc.size(); i++) {
- auto it = ctx.gpr_map.emplace(PhysReg{reg.reg+i}, new_entry);
+ auto it = ctx.gpr_map.emplace(PhysReg{reg.reg()+i}, new_entry);
if (!it.second)
it.first->second.join(new_entry);
}
+
+ if (ctx.collect_statistics) {
+ unsigned counters_todo = counters;
+ while (counters_todo) {
+ unsigned i = u_bit_scan(&counters_todo);
+ ctx.unwaited_instrs[i].insert(std::make_pair(ctx.gen_instr, 0u));
+ for (unsigned j = 0; j < rc.size(); j++)
+ ctx.reg_instrs[i][PhysReg{reg.reg()+j}].insert(ctx.gen_instr);
+ }
+ }
}
-void insert_wait_entry(wait_ctx& ctx, Operand op, wait_event event)
+void insert_wait_entry(wait_ctx& ctx, Operand op, wait_event event, bool has_sampler=false)
{
if (!op.isConstant() && !op.isUndefined())
- insert_wait_entry(ctx, op.physReg(), op.regClass(), event, false);
+ insert_wait_entry(ctx, op.physReg(), op.regClass(), event, false, has_sampler);
}
-void insert_wait_entry(wait_ctx& ctx, Definition def, wait_event event)
+void insert_wait_entry(wait_ctx& ctx, Definition def, wait_event event, bool has_sampler=false)
{
- insert_wait_entry(ctx, def.physReg(), def.regClass(), event, true);
+ insert_wait_entry(ctx, def.physReg(), def.regClass(), event, true, has_sampler);
}
void gen(Instruction* instr, wait_ctx& ctx)
wait_event ev = !instr->definitions.empty() || ctx.chip_class < GFX10 ? event_vmem : event_vmem_store;
update_counters(ctx, ev, get_barrier_interaction(instr));
+ bool has_sampler = instr->format == Format::MIMG && !instr->operands[1].isUndefined() && instr->operands[1].regClass() == s4;
+
if (!instr->definitions.empty())
- insert_wait_entry(ctx, instr->definitions[0], ev);
+ insert_wait_entry(ctx, instr->definitions[0], ev, has_sampler);
if (ctx.chip_class == GFX6 &&
instr->format != Format::MIMG &&
std::vector<aco_ptr<Instruction>> new_instructions;
wait_imm queued_imm;
+
+ ctx.collect_statistics = program->collect_statistics;
+
for (aco_ptr<Instruction>& instr : block.instructions) {
bool is_wait = !parse_wait_instr(ctx, instr.get()).empty();
queued_imm.combine(kill(instr.get(), ctx));
+ ctx.gen_instr = instr.get();
gen(instr.get(), ctx);
if (instr->format != Format::PSEUDO_BARRIER && !is_wait) {
queued_imm = wait_imm();
}
new_instructions.emplace_back(std::move(instr));
+
+ if (ctx.collect_statistics)
+ ctx.advance_unwaited_instrs();
}
}
} /* end namespace */
+static uint32_t calculate_score(std::vector<wait_ctx> &ctx_vec, uint32_t event_mask)
+{
+ double result = 0.0;
+ unsigned num_waits = 0;
+ while (event_mask) {
+ unsigned event_index = u_bit_scan(&event_mask);
+ for (const wait_ctx &ctx : ctx_vec) {
+ for (unsigned dist : ctx.wait_distances[event_index]) {
+ double score = dist;
+ /* for many events, excessive distances provide little benefit, so
+ * decrease the score in that case. */
+ double threshold = INFINITY;
+ double inv_strength = 0.000001;
+ switch (1 << event_index) {
+ case event_smem:
+ threshold = 70.0;
+ inv_strength = 75.0;
+ break;
+ case event_vmem:
+ case event_vmem_store:
+ case event_flat:
+ threshold = 230.0;
+ inv_strength = 150.0;
+ break;
+ case event_lds:
+ threshold = 16.0;
+ break;
+ default:
+ break;
+ }
+ if (score > threshold) {
+ score -= threshold;
+ score = threshold + score / (1.0 + score / inv_strength);
+ }
+
+ /* we don't want increases in high scores to hide decreases in low scores,
+ * so raise to the power of 0.1 before averaging. */
+ result += pow(score, 0.1);
+ num_waits++;
+ }
+ }
+ }
+ return round(pow(result / num_waits, 10.0) * 10.0);
+}
+
void insert_wait_states(Program* program)
{
/* per BB ctx */
std::vector<bool> done(program->blocks.size());
- wait_ctx in_ctx[program->blocks.size()];
- wait_ctx out_ctx[program->blocks.size()];
- for (unsigned i = 0; i < program->blocks.size(); i++)
- in_ctx[i] = wait_ctx(program);
+ std::vector<wait_ctx> in_ctx(program->blocks.size(), wait_ctx(program));
+ std::vector<wait_ctx> out_ctx(program->blocks.size(), wait_ctx(program));
+
std::stack<unsigned> loop_header_indices;
unsigned loop_progress = 0;
for (unsigned b : current.logical_preds)
changed |= ctx.join(&out_ctx[b], true);
- in_ctx[current.index] = ctx;
-
- if (done[current.index] && !changed)
+ if (done[current.index] && !changed) {
+ in_ctx[current.index] = std::move(ctx);
continue;
+ } else {
+ in_ctx[current.index] = ctx;
+ }
if (current.instructions.empty()) {
- out_ctx[current.index] = ctx;
+ out_ctx[current.index] = std::move(ctx);
continue;
}
handle_block(program, current, ctx);
- out_ctx[current.index] = ctx;
+ out_ctx[current.index] = std::move(ctx);
+ }
+
+ if (program->collect_statistics) {
+ program->statistics[statistic_vmem_score] =
+ calculate_score(out_ctx, event_vmem | event_flat | event_vmem_store);
+ program->statistics[statistic_smem_score] =
+ calculate_score(out_ctx, event_smem);
}
}
projects / mesa.git / blobdiff