void cache_leak_init (void)
{
n_lines = decayed_cache->nsets * decayed_cache->assoc;
cache_size = n_lines * decayed_cache->bsize;
/* local width = bits_per_counter */
local_width = ln2(local_counter_max + 1);
/* global width = bits_per_counter */
global_width = ln2(global_counter_max + 1);
/* tag size = virtual_addr_size - ln(nsets*bsize) */
v_addr_size = sizeof (md_addr_t) * 8;
tag_size = v_addr_size - (ln2(decayed_cache->nsets) + ln2(decayed_cache->bsize)) + CACHE_BLK_NFLAGS;
tag_array_size = (tag_size * n_lines)/8; /* bytes */
/* store the power estimates for leakage modeling overhead */
/* overhead power modeled as simple array */
global_af = 1.0/global_width; /* assuming gray coding */
local_af = 0.5;
/* global counter power - per access */
global_access_power = simple_array_wordline_power(1,global_width,1,1,0);
/* no decoder power - may need to FIX THIS */
global_access_power += global_af * simple_array_bitline_power(1,global_width,1,1,0);
/* local counter power - per access */
local_access_power = simple_array_wordline_power(n_lines,local_width,1,1,0);
/* no decoder power - may need to FIX THIS */
local_access_power += local_af * simple_array_bitline_power(n_lines,local_width,1,1,0);
/* power per local counter reset */
local_reset_power = simple_array_wordline_power(1,local_width,1,1,0);
/* no decoder power - may need to FIX THIS */
local_reset_power += local_af * simple_array_bitline_power(1,local_width,1,1,0);
}
main()
{
double predeclength, wordlinelength, bitlinelength;
double regfile_power, regfile_decoder, regfile_wordline, regfile_wordline16, regfile_wordline33, regfile_bitline;
int scale_factor;
int data_width;
int rports, wports;
int switch_arg;
printf("1. Simple Register File\n");
printf("2. Simple Cache Structure\n");
printf("3. Simple CAM Structure\n");
printf("4. Complex Cache (Auto-Sized)\n");
scanf("%d",&switch_arg);
printf("note these are MAX powers (assuming full switching)\n");
switch(switch_arg){
case 1:
{
printf("Enter Reg File Params:\n");
printf("Number of Registers: ");
scanf("%d",&num_regs);
printf("Data Width: ");
scanf("%d",&data_width);
printf("Number of Read Ports: ");
scanf("%d",&rports);
printf("Number of Write Ports: ");
scanf("%d",&wports);
printf("%d-entryx%d-width,%d-rdport,%d-wrport: %f (W)\n",num_regs,data_width,rports,wports,simple_array_power(num_regs,data_width,rports,wports,0));
printf(" decode_power (W): %f\n",simple_array_decoder_power(num_regs,data_width,rports,wports,0));
printf(" wordline_power (W): %f\n",simple_array_wordline_power(num_regs,data_width,rports,wports,0));
printf(" bitline_power (W): %f\n",simple_array_bitline_power(num_regs,data_width,rports,wports,0));
break;
}
case 2:
{
printf("Enter Cache Params:\n");
printf("Size of cache: ");
scanf("%d",&num_regs);
printf("Data Width: ");
scanf("%d",&data_width);
printf("Number of Read Ports: ");
scanf("%d",&rports);
printf("Number of Write Ports: ");
scanf("%d",&wports);
printf("%d-entryx%d-width,%d-rdport,%d-wrport: %f (W)\n",num_regs,data_width,rports,wports,simple_array_power(num_regs,data_width,rports,wports,1));
printf(" decode_power (W): %f\n",simple_array_decoder_power(num_regs,data_width,rports,wports,1));
printf(" wordline_power (W): %f\n",simple_array_wordline_power(num_regs,data_width,rports,wports,1));
printf(" bitline_power (W): %f\n",simple_array_bitline_power(num_regs,data_width,rports,wports,1));
break;
}
case 3:
{
printf("Enter CAM Params:\n");
printf("Entries in CAM: ");
scanf("%d",&num_regs);
printf("Tag Width: ");
scanf("%d",&data_width);
printf("Number of Read Ports: ");
scanf("%d",&rports);
printf("Number of Write Ports: ");
scanf("%d",&wports);
printf("%d-entryx%d-tagwidth,%d-rdport,%d-wrport: %f (W)\n",num_regs,data_width,rports,wports,cam_array(num_regs,data_width,rports,wports));
printf(" tagdrive_power (W): %f\n",cam_tagdrive(num_regs,data_width,rports,wports));
printf(" tagmatch_power (W): %f\n",cam_tagmatch(num_regs,data_width,rports,wports));
break;
}
case 4:
{
int nsets, bsize, assoc,res_memport, tagsize;
int ndwl, ndbl, nspd, ntwl, ntbl, ntspd, c,b,a,cache, rowsb, colsb, trowsb, tcolsb;
double cache_decoder, cache_wordline, cache_bitline,
cache_senseamp, cache_tagarray, total_cache_power;
time_result_type time_result;
time_parameter_type time_parameters;
int va_size = 48;
printf("Enter Cache Params:\n");
printf("Number of Sets in cache: ");
scanf("%d",&nsets);
printf("Block Size (bytes): ");
scanf("%d",&bsize);
printf("Associativity: ");
scanf("%d",&assoc);
printf("Number of Memory Ports: ");
scanf("%d",&res_memport);
printf("note tagarray size is estimated based on assuming 48-bit virtual addresses\n");
cache = 1;
time_parameters.cache_size = nsets * bsize * assoc; /* C */
time_parameters.block_size = bsize; /* B */
time_parameters.associativity = assoc; /* A */
time_parameters.number_of_sets = nsets; /* C/(B*A) */
calculate_time(&time_result,&time_parameters);
output_data(&time_result,&time_parameters);
ndwl=time_result.best_Ndwl;
ndbl=time_result.best_Ndbl;
nspd=time_result.best_Nspd;
ntwl=time_result.best_Ntwl;
ntbl=time_result.best_Ntbl;
ntspd=time_result.best_Ntspd;
c = time_parameters.cache_size;
b = time_parameters.block_size;
a = time_parameters.associativity;
rowsb = c/(8*b*a*ndbl*nspd);
colsb = 8*b*a*nspd/ndwl;
tagsize = va_size - ((int)logtwo(nsets) + (int)logtwo(bsize));
trowsb = c/(8*b*a*ntbl*ntspd);
tcolsb = a * (tagsize + 1 + 6) * ntspd/ntwl;
predeclength = rowsb * (RegCellHeight + WordlineSpacing);
wordlinelength = colsb * (RegCellWidth + BitlineSpacing);
bitlinelength = rowsb * (RegCellHeight + WordlineSpacing);
cache_decoder = res_memport*ndwl*ndbl*array_decoder_power(rowsb,colsb,predeclength,1,1,cache);
cache_wordline = res_memport*ndwl*ndbl*array_wordline_power(rowsb,colsb,wordlinelength,1,1,cache);
cache_bitline = res_memport*ndwl*ndbl*array_bitline_power(rowsb,colsb,bitlinelength,1,1,cache);
cache_senseamp = res_memport*ndwl*ndbl*senseamp_power(colsb);
cache_tagarray = res_memport*ntwl*ntbl*(simple_array_power(trowsb,tcolsb,1,1,cache));
total_cache_power = cache_decoder + cache_wordline + cache_bitline + cache_senseamp + cache_tagarray;
fprintf(stderr,"%d KB %d-way cache (%d-byte block size):\n",c,a,b);
fprintf(stderr,"ndwl == %d, ndbl == %d, nspd == %d\n",ndwl,ndbl,nspd);
fprintf(stderr,"%d sets of %d rows x %d cols\n",ndwl*ndbl,rowsb,colsb);
fprintf(stderr,"tagsize == %d\n",tagsize);
fprintf(stderr,"\nntwl == %d, ntbl == %d, ntspd == %d\n",ntwl,ntbl,ntspd);
fprintf(stderr,"%d sets of %d rows x %d cols\n",ntwl*ntbl,trowsb,tcolsb);
printf("Total Power (W): %f\n",total_cache_power);
printf(" decode_power (W): %f\n",cache_decoder);
printf(" wordline_power (W): %f\n",cache_wordline);
printf(" bitline_power (W): %f\n",cache_bitline);
printf(" senseamp_power (W): %f\n",cache_senseamp);
printf(" tagarray_power (W): %f\n",cache_tagarray);
break;
}
default:
}
}
