Hi Andy, thanks a lot for these tests ! I can see that it is well flushing the buffer that affects the performance, as we suspected, and which is logical.
However, without this step I am constantly getting "ft2232 buffer size reached" errors for both libftdi, libftd2xx and libftdi-1.0 and FASTDATA does not work... I do not know if there is some other way to prevent this and not affect performances. BR, Drasko On Mon, Apr 4, 2011 at 5:50 PM, Andrew Lyon <andrew.l...@gmail.com> wrote: > On Mon, Apr 4, 2011 at 4:21 PM, Drasko DRASKOVIC > <drasko.drasko...@gmail.com> wrote: >> Hi Andrew, >> this might also come from the while(1) loop functionality which is now >> by my opinion done well. >> >> Maybe before it worked, but I think it was not really correct and not >> promised good results for all MIPS targets. >> >> What happens if you do not apply patch #3 (added jtag_execute_queue()) >> ? Is this the reason of slow down, or is it #2 (while (1) loop) ? > > Revert #3: 34.624 KiB/s > Revert #2: 1.950 KiB/s > Apply All: 1.950 KiB/s > > Something I did notice, I did a few runs of each one to make sure the > speed reported was accurate, I noticed that in all cases the first > load_image takes slightly longer than any subsequent runs: > > Revert #2: > > downloaded 109628 bytes in 56.909698s (1.881 KiB/s) > downloaded 109628 bytes in 54.896725s (1.950 KiB/s) > downloaded 109628 bytes in 54.891483s (1.950 KiB/s) > downloaded 109628 bytes in 54.891483s (1.950 KiB/s) > > Apply all: > > downloaded 109628 bytes in 56.653496s (1.890 KiB/s) > downloaded 109628 bytes in 54.862507s (1.951 KiB/s) > downloaded 109628 bytes in 54.891483s (1.950 KiB/s) > downloaded 109628 bytes in 54.891483s (1.950 KiB/s) > > Revert #3: > > downloaded 109628 bytes in 3.101150s (34.522 KiB/s) > downloaded 109628 bytes in 1.105152s (96.872 KiB/s) > downloaded 109628 bytes in 1.102143s (97.137 KiB/s) > downloaded 109628 bytes in 1.101120s (97.227 KiB/s) > > Andy > >> BR, >> Drasko >> >> On Mon, Apr 4, 2011 at 5:06 PM, Andrew Lyon <andrew.l...@gmail.com> wrote: >>> On Mon, Apr 4, 2011 at 2:51 PM, Drasko DRASKOVIC >>> <drasko.drasko...@gmail.com> wrote: >>>> Hi all, >>>> here is a set of patched (separeted by the logical changes they >>>> introduce) that : >>>> 1) Correct endianess for big endian targets >>>> 2) Correct while(1) loop waiting for PrAcc to be "1" >>>> 3) Change FASTDATA operation, forcing the shift out to prevent "ft2232 >>>> buffer size reached" errors >>>> 4) Add optimizations similar to ones introduced by Øyvind recently >>>> >>>> With these patches I was able to obtain decent performances and >>>> correct functioning for my big endian MIPS-M14Kc based target. >>>> >>>> I see no more problems with libftdi of type : >>>> Error: couldn't read enough bytes from FT2232 device (0 < 5) >>>> Current stable version of libftdi can be used, no need for closed D2XX >>>> files nor for development branches of libusb-1.0 >>>> >>>> I also have no more problems with GDB synchronisation - ELF can be >>>> correctly downloaded and executed from GDB. >>>> >>>> Best regards, >>>> Drasko >>>> >>> >>> Hi Drasko, >>> >>> I reverted the patches I used previously and applied your 4 patches >>> but load_image is now much slower: >>> >>> Debug: 132 223732 command.c:151 script_debug(): command - ocd_command >>> ocd_command type ocd_halt >>> Debug: 133 223732 command.c:151 script_debug(): command - halt ocd_halt >>> Debug: 135 223738 target.c:2196 handle_halt_command(): - >>> Debug: 136 223738 mips_m4k.c:182 mips_m4k_halt(): target->state: running >>> Debug: 137 223746 mips_ejtag.c:239 mips_ejtag_enter_debug(): >>> ejtag_ctrl: 0x4004c008 >>> Debug: 141 225374 mips_m4k.c:109 mips_m4k_debug_entry(): entered debug >>> state at PC 0x83fe4128, target->state: halted >>> Debug: 142 225374 target.c:1053 target_call_event_callbacks(): target >>> event 2 (gdb-halt) >>> Debug: 143 225374 target.c:1053 target_call_event_callbacks(): target >>> event 3 (halted) >>> User : 144 225374 target.c:1330 target_arch_state(): target state: halted >>> User : 145 225374 mips32.c:259 mips32_arch_state(): target halted in >>> MIPS32 mode due to debug-request, pc: 0x83fe4128 >>> Debug: 146 227896 command.c:151 script_debug(): command - ocd_command >>> ocd_command type ocd_load_image u-boot.bin.new 0xa0400000 >>> Debug: 147 227897 command.c:151 script_debug(): command - load_image >>> ocd_load_image u-boot.bin.new 0xa0400000 >>> Debug: 149 227903 configuration.c:87 find_file(): found u-boot.bin.new >>> Debug: 150 227903 configuration.c:87 find_file(): found u-boot.bin.new >>> Debug: 151 227904 target.c:1346 target_write_buffer(): writing buffer >>> of 109628 byte at 0xa0400000 >>> Debug: 152 227904 mips_m4k.c:1037 mips_m4k_bulk_write_memory(): >>> address: 0xa0400000, count: 0x00006b0f >>> Debug: 153 227904 target.c:1157 target_alloc_working_area_try(): MMU >>> disabled, using physical address for working memory 0xa0010000 >>> Debug: 154 227904 target.c:1217 target_alloc_working_area_try(): >>> allocated new working area at address 0xa0010000 >>> Debug: 158 229698 mips32_pracc.c:1018 mips32_pracc_fastdata_xfer(): >>> mips32_pracc_fastdata_xfer using 0xa0010000 for write handler >>> Debug: 159 284584 log.c:437 keep_alive(): keep_alive() was not invoked >>> in the 1000ms timelimit (55226). This may cause trouble with GDB >>> connections. >>> User : 161 284588 command.c:557 command_print(): 109628 bytes written >>> at address 0xa0400000 >>> User : 162 284588 command.c:557 command_print(): downloaded 109628 >>> bytes in 56.685356s (1.889 KiB/s) >>> >>> >>> Compared to the version I was using previously which just had the two >>> patches for endianness: >>> >>> Debug: 100 50064 command.c:151 script_debug(): command - ocd_command >>> ocd_command type ocd_halt >>> Debug: 101 50065 command.c:151 script_debug(): command - halt ocd_halt >>> Debug: 103 50071 target.c:2196 handle_halt_command(): - >>> Debug: 104 50071 mips_m4k.c:178 mips_m4k_halt(): target->state: running >>> Debug: 105 50079 mips_ejtag.c:218 mips_ejtag_enter_debug(): >>> ejtag_ctrl: 0x4004c008 >>> Debug: 111 52855 mips_m4k.c:109 mips_m4k_debug_entry(): entered debug >>> state at PC 0x83fe4128, target->state: halted >>> Debug: 112 52855 target.c:1053 target_call_event_callbacks(): target >>> event 2 (gdb-halt) >>> Debug: 113 52855 target.c:1053 target_call_event_callbacks(): target >>> event 3 (halted) >>> User : 114 52855 target.c:1330 target_arch_state(): target state: halted >>> User : 115 52855 mips32.c:259 mips32_arch_state(): target halted in >>> MIPS32 mode due to debug-request, pc: 0x83fe4128 >>> Debug: 116 54993 command.c:151 script_debug(): command - ocd_command >>> ocd_command type ocd_load_image u-boot.bin.new 0xa0400000 >>> Debug: 117 54993 command.c:151 script_debug(): command - load_image >>> ocd_load_image u-boot.bin.new 0xa0400000 >>> Debug: 119 54999 configuration.c:87 find_file(): found u-boot.bin.new >>> Debug: 120 54999 configuration.c:87 find_file(): found u-boot.bin.new >>> Debug: 121 55000 target.c:1346 target_write_buffer(): writing buffer >>> of 109628 byte at 0xa0400000 >>> Debug: 122 55000 mips_m4k.c:1016 mips_m4k_bulk_write_memory(): >>> address: 0xa0400000, count: 0x00006b0f >>> Debug: 123 55000 target.c:1157 target_alloc_working_area_try(): MMU >>> disabled, using physical address for working memory 0xa0010000 >>> Debug: 124 55000 target.c:1217 target_alloc_working_area_try(): >>> allocated new working area at address 0xa0010000 >>> Debug: 131 58210 mips32_pracc.c:995 mips32_pracc_fastdata_xfer(): >>> mips32_pracc_fastdata_xfer using 0xa0010000 for write handler >>> Debug: 133 58513 ft2232.c:1959 ft2232_execute_scan(): ft2232 buffer >>> size reached, sending queued commands (first_unsent: 0xb74db008, cmd: >>> 0xb73e1fe8) >>> Debug: 134 58781 ft2232.c:1959 ft2232_execute_scan(): ft2232 buffer >>> size reached, sending queued commands (first_unsent: 0xb73e1fe8, cmd: >>> 0xb72e8fac) >>> Debug: 135 59049 ft2232.c:1959 ft2232_execute_scan(): ft2232 buffer >>> size reached, sending queued commands (first_unsent: 0xb72e8fac, cmd: >>> 0xb71eff28) >>> User : 137 59354 command.c:557 command_print(): 109628 bytes written >>> at address 0xa0400000 >>> User : 138 59354 command.c:557 command_print(): downloaded 109628 >>> bytes in 4.355341s (24.581 KiB/s) >>> >>> Andy >>> >> > _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
