Hi Tony/Amit, anybody has tried to use powertop from linaro on a single core ARM SoC? What i am using is git://android.git.linaro.org/platform/external/powertop.git. I got two questions: 1. powertop will crash in handle_one_cpu() due to it gets wrong cpu number(-1), then i made the following change to make it work:
powertop: fix segment fault for single cpu env
Signed-off-by: Barry Song <baohua.s...@csr.com>
diff --git a/cpu/cpu.cpp b/cpu/cpu.cpp
index 29fc72c..c56c746 100644
--- a/cpu/cpu.cpp
+++ b/cpu/cpu.cpp
@@ -302,6 +302,9 @@ void enumerate_cpus(void)
model = strtoull(c, NULL, 10);
}
}
+
+ if (number == -1)
+ number = 0;
if (strncasecmp(line, "bogomips\t", 9) == 0) {
handle_one_cpu(number, vendor, family, model);
set_max_cpu(number);
2. after fixing problem1, powertop can run on PrimaII, but i always
get 0.0% for every p states as you can see from attached pic.
but if we check cpufreq stats in
/sys/devices/system/cpu/cpu0/cpufreq/stats, my system does change freq
based on ondemand.
# cat time_in_state
800000 2064
600000 181
400000 341
200000 60381
# cat trans_table
From : To
: 800000 600000 400000 200000
800000: 0 13 13 14
600000: 5 0 3 5
400000: 5 0 0 11
200000: 29 0 0 0
# cat total_trans
98
does anyone have experiences about it?
Thanks
barry
<<attachment: freq states.PNG>>
_______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
