Messages in this thread | | | Date | Mon, 19 Jan 1998 00:58:38 -0500 (EST) | From | Emil Briggs <> | Subject | SMP profiling broken in 2.1.78? |
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I wanted to compare the SMP statistics for 2.0 and 2.1 series kernels so I turned on the profiling and took a look. The results don't look quite right to me however. Am I missing something here? Or are the 2.1 kernels only supposed to show total interrupts and not per CPU?
Emil
From 2.1.78 CPUS: 2 SUM P0 P1 0: 233374 0 0 timer 1: 5055 0 0 keyboard 2: 0 0 0 cascade 3: 37870 0 0 serial 13: 4 0 0 fpu 14: 39074 0 0 BusLogic BT-958 15: 9 0 0 ide1 LCK: 0 0 0 spins from int LCK: 0 0 0 spins from syscall LCK: 0 0 0 spins from sysidle IDLE 0 0 0 idle ticks TICK 466720 233360 233360 local APIC timer ticks MULT: 1 1 profiling multiplier COUNT: 1 1 profiling counter IPI: 0 received
and for 2.0.33 CPUS: 2 SUM P0 P1 0: 51339 51339 0 timer 1: 1287 1287 0 keyboard 2: 0 0 0 cascade 3: 15102 15102 0 + serial 4: 13589 13589 0 + serial 7: 73 73 0 DS21041 Tulip 8: 1 1 0 + rtc 13: 24550 10328 14222 + IPI 14: 6476 6476 0 + BusLogic BT-958 15: 0 0 0 + ide1 LCK: 9373612 2039366 7334246 spins from int LCK: 14831436 7601292 7230144 spins from syscall LCK: 3348152 1825244 1522908 spins from sysidle IDLE 97504 48851 48653 idle ticks IPI: 24550 received
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