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Hansung Kim
2024-03-21 15:44:50 -07:00
parent 9438862389
commit 3718a57937
1 changed files with 4 additions and 0 deletions
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4
hw/rtl/core/VX_scoreboard.sv
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@@ -44,6 +44,9 @@ module VX_scoreboard import VX_gpu_pkg::*; #(
`POP_COUNT(perf_stalls_per_cycle, perf_issue_stalls_per_cycle); `POP_COUNT(perf_stalls_per_cycle, perf_issue_stalls_per_cycle);
// NOTE(hansung): Because of OR-reduce, things are counted as once even when
// multiple warps were using the same execution unit type at a given cycle.
// This might result in an overall undercount
VX_reduce #( VX_reduce #(
.DATAW_IN (`NUM_EX_UNITS), .DATAW_IN (`NUM_EX_UNITS),
.N (`ISSUE_WIDTH), .N (`ISSUE_WIDTH),
@@ -152,6 +155,7 @@ module VX_scoreboard import VX_gpu_pkg::*; #(
assign perf_issue_stalls_per_cycle[i] = ibuffer_if[i].valid && ~ibuffer_if[i].ready; assign perf_issue_stalls_per_cycle[i] = ibuffer_if[i].valid && ~ibuffer_if[i].ready;
`endif `endif
// NOTE(hansung): why is inuse_rd checked? to prevent WAW?
wire [3:0] operands_busy = {inuse_rd, inuse_rs1, inuse_rs2, inuse_rs3}; wire [3:0] operands_busy = {inuse_rd, inuse_rs1, inuse_rs2, inuse_rs3};
wire operands_ready = ~(| operands_busy); wire operands_ready = ~(| operands_busy);