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INL-retro-progdump
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Some timing tests on windows machine. Double buffering was pretty 

successful only 1KBps speed drop when actually dumping real cart data.
This commit is contained in:
Paul Molloy 2016-12-12 22:31:46 -06:00
parent a7eaf970b2
commit 876b526e8c
5 changed files with 12 additions and 6 deletions
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1
firmware/source/buffer.c
View File

@ -653,7 +653,6 @@ void update_buffers()
}
//usbPoll();
//this will get entered on first and all successive calls
if ( operation == DUMPING ) {
//buffer_payload will pass cur_buff to usb driver on next IN transfer

6
firmware/source/nes.c
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@ -422,12 +422,12 @@ uint8_t nes_cpu_page_rd_poll( uint8_t *data, uint8_t addrH, uint8_t first, uint8
ADDR_OUT = first; //doing this prior to entry and right after latching
//gives longest delay between address out and latching data
for( i=0; i<=len; i++ ) {
//couple more NOP's waiting for data
//testing shows that having this if statement doesn't affect overall dumping speed
if ( poll == FALSE ) {
NOP(); //couple more NOP's waiting for data
NOP(); //one prob good enough considering the if/else
NOP();
} else {
usbPoll();
usbPoll(); //Call usbdrv.h usb polling while waiting for data
}
//latch data
data[i] = DATA_IN;

1
firmware/source/nes.h
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@ -19,5 +19,6 @@ uint8_t nes_ppu_rd( uint8_t addrH, uint8_t addrL );
void nes_ppu_wr( uint8_t addrH, uint8_t addrL, uint8_t data );
uint8_t ciram_a10_mirroring( void );
uint8_t nes_cpu_page_rd_poll( uint8_t *data, uint8_t addrH, uint8_t first, uint8_t last, uint8_t poll );
uint8_t nes_ppu_page_rd_poll( uint8_t *data, uint8_t addrH, uint8_t first, uint8_t last, uint8_t poll );
#endif

9
host/source/dump.c
View File

@ -97,19 +97,24 @@ int dump_cart( USBtransfer* transfer, rom_image *rom, cartridge *cart )
// get_buff_operation( transfer );
// get_buff_elements( transfer, buff0 );
// get_buff_elements( transfer, buff1 );
clock_t tstart, tstop;
tstart = clock();
//now just need to call series of payload IN transfers to retrieve data
//for( i=0; i<(256*KByte/buff_size); i++) {
//for( i=0; i<(512*KByte/buff_size); i++) {
for( i=0; i<(32*KByte/buff_size); i++) {
//for( i=0; i<(8*KByte/buff_size); i++) {
//payload transfer in and append to file
if ( i % 256 == 0 ) debug("payload in #%d", i);
// if ( i % 256 == 0 ) debug("payload in #%d", i);
check(! payload_in( transfer, data, buff_size ), "Error with payload IN");
if (i==0) printf("first byte: %x\n", data[0]);
check(! append_to_file( rom, data, buff_size ), "Error with file append");
}
debug("payload done");
tstop = clock();
float timediff = ( (float)(tstop-tstart) / CLOCKS_PER_SEC);
printf("total time: %fsec, speed: %fKBps", timediff, (512/timediff));
//TODO flush file from time to time..?

1
shared/shared_dict_buffer.h
View File

@ -400,6 +400,7 @@
// 256Byte OUT (write) transfers with long transfers ENABLED: 18.56sec/512KByte = 27.6 KBps
// 254Byte OUT (write) transfers with long transfers DISABLED: 17.9 sec/512KByte = 28.6 KBps (assuming 2 bytes stuffed in setup packet)
// 128Byte IN (read) with long xfr DISABLED, w/o usbFuncRd: 30.5 sec/512KByte = 16.8 KBps
//with read data dumping operations and file writing: 128Byte IN 32.25sec/512KByte = 15.8 KBps only 1KBps lost due to dumping operation
// 128Byte IN (read) with long xfr DISABLED, w/usbFuncRd: 34.9 sec/512KByte = 14.7 KBps
// 1033*254Byte IN (read) long xfr DISABLED, w/o usbFuncRd: 28.35sec/512KByte = 18.1 KBps
//