boot_code/cache_fill_and_empty.asm

@@ -1,4 +1,5 @@
 .ORG 0x0100
+mov sp,#STACK
 MOV DI,#0x2000
 STOS
 STOS
@@ -28,6 +29,10 @@ MOV CX,#0x0000
 MOV CX,#0x0000
 HLT
 
+NOTHING: ret
+.BLKB 200
+STACK:
+
 .ORG 0xFFF0
 MOV AX,#0x0100
 JMP AX

system/processor.v

@@ -42,14 +42,10 @@ module processor (
 	/*  STATISTICS */ ,output reg new_instruction
 `endif
 `ifdef OTUPUT_JSON_STATISTICS
-	/*             */ ,output wire [`L1_CACHE_SIZE-1:0] L1_SIZE_STAT, output wire VALID_INSTRUCTION_STAT, output wire jump_req_debug
+	/*             */ ,output wire [`L1_CACHE_SIZE-1:0] L1_SIZE_STAT, output wire VALID_INSTRUCTION_STAT
 `endif
 	);
 
-`ifdef OTUPUT_JSON_STATISTICS
-assign jump_req_debug=biu_jump_req;
-`endif
-
 /* If there is an error either from the decoder or execution unit set it to ERROR */
 assign ERROR=(DE_ERROR!=`ERR_NO_ERROR)?DE_ERROR:(EXEC_ERROR!=`ERR_NO_ERROR)?EXEC_ERROR:`ERR_NO_ERROR;
 

system/system.v

@@ -30,7 +30,7 @@ wire new_instruction;
 
 `ifdef OTUPUT_JSON_STATISTICS
 wire unsigned [`L1_CACHE_SIZE-1:0] L1_SIZE_STAT;
-wire VALID_INSTRUCTION_STAT,jump_req;
+wire VALID_INSTRUCTION_STAT;
 `endif
 
 processor p(
@@ -40,7 +40,7 @@ processor p(
 	/*  STATISTICS */ ,new_instruction
 `endif
 `ifdef OTUPUT_JSON_STATISTICS
-	/*             */ ,L1_SIZE_STAT, VALID_INSTRUCTION_STAT, jump_req
+	/*             */ ,L1_SIZE_STAT, VALID_INSTRUCTION_STAT
 `endif
 	);
 
@@ -81,7 +81,7 @@ end
 reg first_json_cycle;
 always @(negedge clock)begin
 	if(HALT==0 && json_file_descriptor!=0)begin
-		$fdisplay(json_file_descriptor,"%s{\"C\":%0d,\"L1\":%0d,\"VDI\":%0d,\"JMP\":%0d}",first_json_cycle?"":",",cycles,L1_SIZE_STAT,VALID_INSTRUCTION_STAT,jump_req);
+		$fdisplay(json_file_descriptor,"%s{\"C\":%0d,\"L1\":%0d,\"VDI\":%0d}",first_json_cycle?"":",",cycles,L1_SIZE_STAT,VALID_INSTRUCTION_STAT);
 		first_json_cycle <= 0;
 	end
 end

tools/plot.sh

@@ -18,7 +18,7 @@ CSV_FILE=$(mktemp)
 IN=$1
 OUT=$3
 
-jq  -r '.Cycles[]| [.C,.L1,.VDI,.JMP]|@csv' -- "$IN" > "$CSV_FILE"
+jq  -r '.Cycles[]| [.C,.L1,.VDI]|@csv' -- "$IN" > "$CSV_FILE"
 
 BASE_GNUPLOT_OPTIONS="set datafile separator ',';set term svg;set output \"${OUT}\";"
 
@@ -26,30 +26,21 @@ parse_cache_size(){
 	CACHE_SIZE=$(jq -r .L1_size -- "$IN")
 }
 
-parse_total_cycles(){
-	TOTAL_CYCLES=$(jq -r .\"Total\ Cycles\" -- "$IN")
-}
-
 case "$2" in
 	"cache_time")
 		parse_cache_size
-		parse_total_cycles
 		gnuplot -e "${BASE_GNUPLOT_OPTIONS}\
 set xlabel \"Clock cycles\";\
 set ylabel \"Cache utilisation (bytes)\";\
 set offsets 0,  0, 3, 1;\
 set ytics 0,1,$((CACHE_SIZE-1));\
-set xtics 0,$((TOTAL_CYCLES/15)),${TOTAL_CYCLES};\
 unset colorbox;\
 set ytics add (\"Valid\" -1);\
 set grid ytics;\
 set yrange [-2:${CACHE_SIZE}];\
-set palette model RGB defined ( 0 'red', 1 'green', 2 'dark-khaki' );\
+set palette model RGB defined ( 0 'red', 1 'green' );\
-plot\
+plot '${CSV_FILE}' using 1:2  with histeps notitle ,\
-     '${CSV_FILE}' using 1:(-2):(0):("'$'"4*100):(2) with vectors nohead palette notitle,\
+     '${CSV_FILE}' using 1:(-0.75):(0):(-0.5):3 with vectors nohead palette notitle"
-     '${CSV_FILE}' using 1:2  with histeps notitle ls 1,\
-     '${CSV_FILE}' using 1:(-0.75):(0):(-0.5):3 with vectors nohead palette notitle \
-     "
 
 		;;
 	"cache_util_freq")