On Wed, 12 Dec 2007 10:01:18 am Rene Herman wrote: > Good day. > > Would some people on x86 (both 32 and 64) be kind enough to compile and run > the attached program? This is about testing how long I/O port access to > port 0x80 takes. It measures in CPU cycles so CPU speed is crucial in > reporting. > > Posted a previous incarnation of this before, buried in the outb 0x80 > thread which had a serialising problem. This one should as far as I can see > measure the right thing though. Please yell if you disagree...
cycles: out 1399, in 303 cycles: out 1347, in 297 cycles: out 1235, in 251 cycles: out 1342, in 249 cycles: out 1393, in 274 cycles: out 1241, in 261 cycles: out 1238, in 251 cycles: out 1383, in 277 cycles: out 1228, in 252 cycles: out 1413, in 303 cycles: out 1394, in 268 cycles: out 1378, in 292 cycles: out 1239, in 265 -m32 build on x64 processor : 1 vendor_id : AuthenticAMD cpu family : 15 model : 107 model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4400+ stepping : 1 cpu MHz : 2300.000 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
