OpenOCD 0.9.0 and speed of JTAG debugger

Hello. I faced the following problem. I need to read cyclicly a region of RAM of the STM32F217. Now I do it via dump_image command. I faced with the fact that no matter what I set the speed through adapter_khz, in fact, it remains the same. I checked it with J-Link v8 and ST-Link v.2 debuggers. The screenshots shown OpenOCD startup parameters and the actual speed, which was got via logic analyzer from the TCK (SWCLK) pin.

ST-Link v.2 950 kHz

[<LINK_TEXT text=“http://storage2.static.itmages.ru/i/15/ … eee619.jpg”>http://storage2.static.itmages.ru/i/15/1019/s_1445284009_1234820_a427eee619.jpg</LINK_TEXT>

ST-Link v.2 1800 kHz

[<LINK_TEXT text=“http://storage8.static.itmages.ru/i/15/ … 5c3b3c.jpg”>http://storage8.static.itmages.ru/i/15/1019/s_1445284160_4758956_3be55c3b3c.jpg</LINK_TEXT>

ST-Link v.2 4000 kHz

[<LINK_TEXT text=“http://storage3.static.itmages.ru/i/15/ … dd9f9e.jpg”>http://storage3.static.itmages.ru/i/15/1019/s_1445284208_2695592_91b4dd9f9e.jpg</LINK_TEXT>

J-Link v.8 8000 kHz

[<LINK_TEXT text=“http://storage5.static.itmages.ru/i/15/ … 52419d.jpg”>http://storage5.static.itmages.ru/i/15/1019/s_1445284261_8343245_ec5052419d.jpg</LINK_TEXT>

What I missed or doing wrong? Does someone make experements with speed of uploading/downloading data via OpenOCD?](http://itmages.ru/image/view/3110235/ec505241)](http://itmages.ru/image/view/3110233/91b4dd9f)](http://itmages.ru/image/view/3110229/3be55c3b)](http://itmages.ru/image/view/3110223/a427eee6)