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Perf optimization. I-cache aware? #17931

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Perf optimization. I-cache aware? #17931

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a163057
Perf optimization. I-cache aware?
daminakaTT Feb 18, 2025
f7b8c96
Merge branch 'main' into dev/daiki/fabric_pkt_hdr_optim
daminakaTT Feb 18, 2025
297511b
Merge branch 'main' into dev/daiki/fabric_pkt_hdr_optim
daminakaTT Feb 18, 2025
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1 change: 0 additions & 1 deletion tt_fabric/hw/inc/tt_fabric.h
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Original file line number Diff line number Diff line change
Expand Up @@ -494,7 +494,6 @@ typedef struct fvc_producer_state {
next_routing_ptr =
(tt_routing*)(next_header_ptr + packet_header_routing_offset_dwords - dwords_before_wrap);
} else {
#pragma GCC unroll 12
for (uint32_t i = 0; i < dwords_to_copy; i++) {
packet_header_ptr[i] = next_header_ptr[i];
}
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8 changes: 4 additions & 4 deletions tt_fabric/hw/inc/tt_fabric_interface.h
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Original file line number Diff line number Diff line change
Expand Up @@ -140,8 +140,8 @@ constexpr uint32_t packet_header_routing_offset_dwords = offsetof(packet_header_
void tt_fabric_add_header_checksum(packet_header_t* p_header) {
uint16_t* ptr = (uint16_t*)p_header;
uint32_t sum = 0;
for (uint32_t i = 2; i < sizeof(packet_header_t) / 2; i++) {
sum += ptr[i];
for (uint32_t i = 2; i + 1 < sizeof(packet_header_t) / 2; i += 2) {
sum += ptr[i] + ptr[i + 1];
}
sum = ~sum;
sum += sum;
Expand All @@ -152,8 +152,8 @@ bool tt_fabric_is_header_valid(packet_header_t* p_header) {
#ifdef TT_FABRIC_DEBUG
uint16_t* ptr = (uint16_t*)p_header;
uint32_t sum = 0;
for (uint32_t i = 2; i < sizeof(packet_header_t) / 2; i++) {
sum += ptr[i];
for (uint32_t i = 2; i + 1 < sizeof(packet_header_t) / 2; i += 2) {
sum += ptr[i] + ptr[i + 1];
}
sum = ~sum;
sum += sum;
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