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scoreboard optimization & profiling

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This commit is contained in:
Blaise Tine
2023-11-27 05:53:36 -08:00
parent 4b68235389
commit 24973ffca0
8 changed files with 206 additions and 112 deletions
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16
hw/rtl/core/VX_issue.sv
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@@ -59,6 +59,10 @@ module VX_issue #(
) scoreboard (
.clk (clk),
.reset (scoreboard_reset),
`ifdef PERF_ENABLE
.perf_scb_stalls(perf_issue_if.scb_stalls),
.perf_scb_uses (perf_issue_if.scb_uses),
`endif
.writeback_if (writeback_if),
.ibuffer_if (ibuffer_if),
.scoreboard_if (scoreboard_if)
@@ -152,29 +156,17 @@ module VX_issue #(
`ifdef PERF_ENABLE
reg [`PERF_CTR_BITS-1:0] perf_ibf_stalls;
reg [`PERF_CTR_BITS-1:0] perf_scb_stalls;
wire [`CLOG2(`ISSUE_WIDTH+1)-1:0] scoreboard_stalls_per_cycle;
reg [`ISSUE_WIDTH-1:0] scoreboard_stalls;
for (genvar i=0; i < `ISSUE_WIDTH; ++i) begin
assign scoreboard_stalls[i] = ibuffer_if[i].valid && ~ibuffer_if[i].ready;
end
`POP_COUNT(scoreboard_stalls_per_cycle, scoreboard_stalls);
always @(posedge clk) begin
if (reset) begin
perf_ibf_stalls <= '0;
perf_scb_stalls <= '0;
end else begin
if (decode_if.valid && ~decode_if.ready) begin
perf_ibf_stalls <= perf_ibf_stalls + `PERF_CTR_BITS'(1);
end
perf_scb_stalls <= perf_scb_stalls + `PERF_CTR_BITS'(scoreboard_stalls_per_cycle);
end
end
assign perf_issue_if.ibf_stalls = perf_ibf_stalls;
assign perf_issue_if.scb_stalls = perf_scb_stalls;
`endif
endmodule