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Report any fire cycles from scoreboard as well

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This commit is contained in:
Hansung Kim
2024-03-29 12:23:15 -07:00
parent 50263a5f7d
commit 62c7d1f4cf
5 changed files with 37 additions and 7 deletions
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5
hw/rtl/core/VX_core.sv
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@@ -429,6 +429,9 @@ module VX_core import VX_gpu_pkg::*; #(
// this will be a subset of scb_stalls
$display("issue scoreboard: fires total:\t%d across ISSUE_WIDTH=%d",
pipeline_perf_if.scb_fires, `ISSUE_WIDTH);
$display("issue scoreboard: cycles fired:\t%d (%.2f%%)",
pipeline_perf_if.scb_any_fire_cycles,
$itor(pipeline_perf_if.scb_any_fire_cycles) / $itor(cycles) * 100.0);
$display("issue scoreboard: stalls total:\t%d across ISSUE_WIDTH=%d",
pipeline_perf_if.scb_stalls, `ISSUE_WIDTH);
$display("issue scoreboard: stalls by operand hazard: alu %d (%2.2f cycles per issue)",
@@ -468,7 +471,7 @@ module VX_core import VX_gpu_pkg::*; #(
pipeline_perf_if.dispatch_fires[`EX_LSU]);
$display("issue dispatch: fires: sfu %d",
pipeline_perf_if.dispatch_fires[`EX_SFU]);
$display("issue dispatch: cycles issued: %d (%.2f%%)",
$display("issue dispatch: cycles fired: %d (%.2f%%)",
pipeline_perf_if.dispatch_any_fire_cycles,
$itor(pipeline_perf_if.dispatch_any_fire_cycles) / $itor(cycles) * 100.0);
$display("ifetches: %d", perf_ifetches);

8
hw/rtl/core/VX_dispatch.sv
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@@ -236,12 +236,12 @@ module VX_dispatch import VX_gpu_pkg::*; #(
`BUFFER(perf_unit_valids_per_cycle_r, perf_unit_valids_per_cycle);
`BUFFER(perf_unit_fires_per_cycle_r, perf_unit_fires_per_cycle);
reg perf_any_fire;
reg perf_any_fire_per_cycle;
always @(*) begin
perf_any_fire = 1'b0;
perf_any_fire_per_cycle = 1'b0;
for (integer i = 0; i < `NUM_EX_UNITS; ++i) begin
if (perf_unit_fires_per_cycle_r[i] != '0) begin
perf_any_fire = 1'b1;
perf_any_fire_per_cycle = 1'b1;
end
end
end
@@ -257,7 +257,7 @@ module VX_dispatch import VX_gpu_pkg::*; #(
perf_stalls_r[i] <= perf_stalls_r[i] + `PERF_CTR_BITS'(perf_unit_stalls_per_cycle_r[i]);
perf_valids_r[i] <= perf_valids_r[i] + `PERF_CTR_BITS'(perf_unit_valids_per_cycle_r[i]);
perf_fires_r[i] <= perf_fires_r[i] + `PERF_CTR_BITS'(perf_unit_fires_per_cycle_r[i]);
perf_any_fire_cycles_r <= perf_any_fire_cycles_r + `PERF_CTR_BITS'(perf_any_fire);
perf_any_fire_cycles_r <= perf_any_fire_cycles_r + `PERF_CTR_BITS'(perf_any_fire_per_cycle);
end
end
end

1
hw/rtl/core/VX_issue.sv
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@@ -62,6 +62,7 @@ module VX_issue #(
`ifdef PERF_ENABLE
.perf_scb_stalls(perf_issue_if.scb_stalls),
.perf_scb_fires (perf_issue_if.scb_fires),
.perf_scb_any_fire_cycles (perf_issue_if.scb_any_fire_cycles),
.perf_units_uses(perf_issue_if.units_uses),
.perf_sfu_uses (perf_issue_if.sfu_uses),
`endif

27
hw/rtl/core/VX_scoreboard.sv
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@@ -22,6 +22,7 @@ module VX_scoreboard import VX_gpu_pkg::*; #(
`ifdef PERF_ENABLE
output reg [`PERF_CTR_BITS-1:0] perf_scb_stalls,
output reg [`PERF_CTR_BITS-1:0] perf_scb_fires,
output reg [`PERF_CTR_BITS-1:0] perf_scb_any_fire_cycles,
output reg [`PERF_CTR_BITS-1:0] perf_units_uses [`NUM_EX_UNITS],
output reg [`PERF_CTR_BITS-1:0] perf_sfu_uses [`NUM_SFU_UNITS],
`endif
@@ -47,9 +48,13 @@ module VX_scoreboard import VX_gpu_pkg::*; #(
wire [`ISSUE_WIDTH-1:0] perf_issue_fires_per_cycle;
wire [`CLOG2(`ISSUE_WIDTH+1)-1:0] perf_fires_per_cycle, perf_fires_per_cycle_r;
wire perf_any_fire_per_cycle, perf_any_fire_per_cycle_r;
reg [`PERF_CTR_BITS-1:0] perf_scb_empty;
`POP_COUNT(perf_stalls_per_cycle, perf_issue_stalls_per_cycle);
`POP_COUNT(perf_fires_per_cycle, perf_issue_fires_per_cycle);
`POP_COUNT(perf_fires_per_cycle, perf_issue_fires_per_cycle);
assign perf_any_fire_per_cycle = |perf_issue_fires_per_cycle;
for (genvar i=0; i < `NUM_EX_UNITS; ++i) begin
always @(*) begin
@@ -91,16 +96,19 @@ module VX_scoreboard import VX_gpu_pkg::*; #(
`BUFFER(perf_stalls_per_cycle_r, perf_stalls_per_cycle);
`BUFFER(perf_fires_per_cycle_r, perf_fires_per_cycle);
`BUFFER(perf_any_fire_per_cycle_r, perf_any_fire_per_cycle);
`BUFFER(perf_units_per_cycle_r, perf_units_per_cycle);
`BUFFER(perf_sfu_per_cycle_r, perf_sfu_per_cycle);
always @(posedge clk) begin
if (reset) begin
perf_scb_stalls <= '0;
perf_scb_fires <= '0;
perf_scb_fires <= '0;
perf_scb_any_fire_cycles <= '0;
end else begin
perf_scb_stalls <= perf_scb_stalls + `PERF_CTR_BITS'(perf_stalls_per_cycle_r);
perf_scb_fires <= perf_scb_fires + `PERF_CTR_BITS'(perf_fires_per_cycle_r);
perf_scb_any_fire_cycles <= perf_scb_any_fire_cycles + `PERF_CTR_BITS'(perf_any_fire_per_cycle_r);
end
end
@@ -257,4 +265,19 @@ module VX_scoreboard import VX_gpu_pkg::*; #(
end
`ifdef PERF_ENABLE
wire [`ISSUE_WIDTH-1:0] ibuffer_valids;
for (genvar i = 0; i < `ISSUE_WIDTH; ++i) begin
assign ibuffer_valids[i] = ibuffer_if[i].valid;
end
always @(posedge clk) begin
if (reset) begin
perf_scb_empty <= '0;
end else begin
perf_scb_empty <= perf_scb_empty + `PERF_CTR_BITS'(~|ibuffer_valids);
end
end
`endif
endmodule

3
hw/rtl/interfaces/VX_pipeline_perf_if.sv
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@@ -20,6 +20,7 @@ interface VX_pipeline_perf_if ();
wire [`PERF_CTR_BITS-1:0] ibf_stalls;
wire [`PERF_CTR_BITS-1:0] scb_stalls;
wire [`PERF_CTR_BITS-1:0] scb_fires;
wire [`PERF_CTR_BITS-1:0] scb_any_fire_cycles;
wire [`PERF_CTR_BITS-1:0] units_uses [`NUM_EX_UNITS];
wire [`PERF_CTR_BITS-1:0] sfu_uses [`NUM_SFU_UNITS];
wire [`PERF_CTR_BITS-1:0] dispatch_stalls [`NUM_EX_UNITS];
@@ -43,6 +44,7 @@ interface VX_pipeline_perf_if ();
output ibf_stalls,
output scb_stalls,
output scb_fires,
output scb_any_fire_cycles,
output units_uses,
output sfu_uses,
output dispatch_stalls,
@@ -58,6 +60,7 @@ interface VX_pipeline_perf_if ();
input ibf_stalls,
input scb_stalls,
input scb_fires,
input scb_any_fire_cycles,
input units_uses,
input sfu_uses,
input dispatch_stalls,