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ubatch : new splitting logic (#14217)

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ggml-ci
This commit is contained in:
Georgi Gerganov
2025-06-20 10:14:14 +03:00
committed by GitHub
parent 9eaa51e7f0
commit 4c9fdfbe15
19 changed files with 992 additions and 915 deletions
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40
src/llama-kv-cache-unified-iswa.cpp
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@ -95,19 +95,22 @@ llama_pos llama_kv_cache_unified_iswa::seq_pos_max(llama_seq_id seq_id) const {
return kv_swa->seq_pos_max(seq_id);
}
llama_memory_state_ptr llama_kv_cache_unified_iswa::init_batch(const llama_batch & batch, uint32_t n_ubatch, bool embd_all) {
llama_memory_state_ptr llama_kv_cache_unified_iswa::init_batch(llama_batch_allocr & balloc, uint32_t n_ubatch, bool embd_all) {
GGML_UNUSED(embd_all);
// first try simple split
do {
auto sbatch = llama_sbatch(batch, hparams.n_embd, true);
balloc.split_reset();
std::vector<llama_ubatch> ubatches;
while (true) {
auto ubatch = balloc.split_simple(n_ubatch);
while (sbatch.n_tokens > 0) {
auto ubatch = sbatch.split_simple(n_ubatch);
if (ubatch.n_tokens == 0) {
break;
}
ubatches.push_back(ubatch);
ubatches.push_back(std::move(ubatch)); // NOLINT
}
auto heads_base = kv_base->prepare(ubatches);
@ -123,19 +126,22 @@ llama_memory_state_ptr llama_kv_cache_unified_iswa::init_batch(const llama_batch
assert(heads_base.size() == heads_swa.size());
return std::make_unique<llama_kv_cache_unified_iswa_state>(
this, std::move(sbatch), std::move(heads_base), std::move(heads_swa), std::move(ubatches));
this, std::move(heads_base), std::move(heads_swa), std::move(ubatches));
} while (false);
// if it fails, try equal split
do {
auto sbatch = llama_sbatch(batch, hparams.n_embd, false);
balloc.split_reset();
std::vector<llama_ubatch> ubatches;
while (true) {
auto ubatch = balloc.split_equal(n_ubatch);
while (sbatch.n_tokens > 0) {
auto ubatch = sbatch.split_equal(n_ubatch);
if (ubatch.n_tokens == 0) {
break;
}
ubatches.push_back(ubatch);
ubatches.push_back(std::move(ubatch)); // NOLINT
}
auto heads_base = kv_base->prepare(ubatches);
@ -151,7 +157,7 @@ llama_memory_state_ptr llama_kv_cache_unified_iswa::init_batch(const llama_batch
assert(heads_base.size() == heads_swa.size());
return std::make_unique<llama_kv_cache_unified_iswa_state>(
this, std::move(sbatch), std::move(heads_base), std::move(heads_swa), std::move(ubatches));
this, std::move(heads_base), std::move(heads_swa), std::move(ubatches));
} while (false);
// TODO: if we fail again, we should attempt different splitting strategies
@ -214,15 +220,13 @@ llama_kv_cache_unified_iswa_state::llama_kv_cache_unified_iswa_state(
llama_kv_cache_unified_iswa_state::llama_kv_cache_unified_iswa_state(
llama_kv_cache_unified_iswa * kv,
llama_sbatch sbatch,
std::vector<uint32_t> heads_base,
std::vector<uint32_t> heads_swa,
std::vector<llama_ubatch> ubatches) :
sbatch(std::move(sbatch)),
ubatches(std::move(ubatches)),
// note: here we copy the ubatches. not sure if this is ideal
state_base(new llama_kv_cache_unified_state(kv->get_base(), {}, std::move(heads_base), this->ubatches)),
state_swa (new llama_kv_cache_unified_state(kv->get_swa (), {}, std::move(heads_swa), this->ubatches)),
state_base(new llama_kv_cache_unified_state(kv->get_base(), std::move(heads_base), this->ubatches)),
state_swa (new llama_kv_cache_unified_state(kv->get_swa (), std::move(heads_swa), this->ubatches)),
status(llama_memory_status_combine(state_base->get_status(), state_swa->get_status())) {
}
@ -252,12 +256,6 @@ bool llama_kv_cache_unified_iswa_state::apply() {
return res;
}
std::vector<int64_t> & llama_kv_cache_unified_iswa_state::out_ids() {
assert(status == LLAMA_MEMORY_STATUS_SUCCESS);
return sbatch.out_ids;
}
llama_memory_status llama_kv_cache_unified_iswa_state::get_status() const {
return status;
}