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Merge remote-tracking branch 'origin/precoder_optimization' into integration_2025_w42 (!3623)

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Optimization of PDSCH precoding operation

x86/aarch64 optimizations for precoding, more complete timing reporting in
nr_dlsim. Timing report in nr_dlsim now shows the total PDSCH generation time
and is broken down into Layer mapping, resource mapping and precoding.
The optimizations for x86 are basically reorganizing loops (for AVX512,AVX2,
NEON but not SSE2) to minimize repetitive instructions when formatting of the
precoder weights, and creation of inline functions for complex multiply-add.
AVX512 optimization was added. requiring AVX512BW. Detection of up to 4 PRBs
with common PMI for efficiency with AVX512 (was 2 in develop for AVX2).
For aarch64, native coding of the precoder to avoid inefficient SIMDe
translations for this operation.
nr_dlsim now uses default precoding indices depending on the scenario instead
of 0 which doesn't do precoding at all.

See merge request description for nr_dlsim test results.
This commit is contained in:
Jaroslava Fiedlerova
2025-10-13 11:39:57 +02:00
parent 92bc0aee0e 0dcea09e87
commit 769885c05a
14 changed files with 422 additions and 227 deletions
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openair1/SIMULATION/NR_PHY/dlsim.c
+9 -1
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@@ -1029,7 +1029,10 @@ int main(int argc, char **argv)
reset_meas(&gNB->dlsch_rate_matching_stats);
reset_meas(&gNB->dlsch_segmentation_stats);
reset_meas(&gNB->dlsch_modulation_stats);
reset_meas(&gNB->dlsch_pdsch_generation_stats);
reset_meas(&gNB->dlsch_precoding_stats);
reset_meas(&gNB->dlsch_layer_mapping_stats);
reset_meas(&gNB->dlsch_resource_mapping_stats);
reset_meas(&gNB->dlsch_encoding_stats);
reset_meas(&gNB->dci_generation_stats);
reset_meas(&gNB->tinput);
@@ -1343,7 +1346,12 @@ int main(int argc, char **argv)
printStatIndent3(&gNB->dlsch_interleaving_stats, "DLSCH Interleaving time");
printStatIndent2(&gNB->dlsch_modulation_stats,"DLSCH modulation time");
printStatIndent2(&gNB->dlsch_scrambling_stats, "DLSCH scrambling time");
printStatIndent2(&gNB->dlsch_precoding_stats,"DLSCH Mapping/Precoding time");
printStatIndent2(&gNB->dlsch_pdsch_generation_stats,"DLSCH PDSCH Generation time");
printStatIndent3(&gNB->dlsch_layer_mapping_stats,"DLSCH Layer Mapping time");
gNB->dlsch_resource_mapping_stats.trials = gNB->dlsch_layer_mapping_stats.trials;
printStatIndent3(&gNB->dlsch_resource_mapping_stats,"DLSCH Resource Mapping time");
gNB->dlsch_precoding_stats.trials = gNB->dlsch_layer_mapping_stats.trials;
printStatIndent3(&gNB->dlsch_precoding_stats,"DLSCH Precoding time");
if (gNB->phase_comp)
printStatIndent2(&gNB->phase_comp_stats, "Phase Compensation");