6:45 a.m.
On (11/11/12 19:12), cshanahan(a)comcast.net wrote:
Done. Output below.
I hope this helps to make PowerTop better, though it doesn't look like its going
to help me with my problem. PowerTop made some change to my system that I cannot
find. The files in /var/cache/powertop/ are empty. Something was changed with
systemd and I can't find it. The problem persists after reboot. I can boot using
any number of LiveCDs and I the WiFi hardware button works as expected. Hardware
is fine.
6930p:~ # ll /var/cache/powertop/
total 0
-rw-r--r-- 1 root root 0 Nov 8 20:29 saved_parameters.powertop
-rw-r--r-- 1 root root 0 Nov 8 20:29 saved_results.powertop
(gdb) run --calibrate
Starting program: /usr/sbin/powertop --calibrate
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Starting PowerTOP power estimate calibration
Calibrating idle
Detaching after fork from child process 3784.
Program received signal SIGSEGV, Segmentation fault.
perf_bundle::start (this=0x0) at perf/perf_bundle.cpp:180
180 perf/perf_bundle.cpp: No such file or directory.
Missing separate debuginfos, use: zypper install glibc-debuginfo-2.15-22.6.4.x86_64
libgcc47-debuginfo-4.7.1_20120723-1.1.1.x86_64 libncurses5-debuginfo-5.9-12.5.1.x86_64
libnl3-200-debuginfo-3.2.9-2.1.2.x86_64 libpci3-debuginfo-3.1.9-3.1.2.x86_64
libstdc++47-debuginfo-4.7.1_20120723-1.1.1.x86_64 zlib-debuginfo-1.2.7-2.1.2.x86_64
(gdb) bt
#0 perf_bundle::start (this=0x0) at perf/perf_bundle.cpp:180
#1 0x000000000040ff30 in start_cpu_measurement () at cpu/cpu.cpp:297
#2 0x0000000000442f15 in one_measurement (seconds=15) at main.cpp:182
#3 0x000000000043fd7a in idle_calibration () at calibrate/calibrate.cpp:423
#4 calibrate () at calibrate/calibrate.cpp:466
#5 0x0000000000406f98 in main (argc=2, argv=0x7fffffffe388) at main.cpp:325
(gdb)
hm, that's something. seems like enumerate_cpus(); failed
because perf_bundle was NULL in cpu by the time of
perf_events->start();
call, but it did not crashed on any of enumerate_cpus()
332 perf_events = new perf_power_bundle();
333
334 if (!perf_events->add_event("power:cpu_idle")){
335 perf_events->add_event("power:power_start");
336 perf_events->add_event("power:power_end");
337 }
338 if (!perf_events->add_event("power:cpu_frequency"))
339 perf_events->add_event("power:power_frequency");
so it leaves only one suspect: enumerate_cpus()
269 file.open("/proc/cpuinfo", ios::in);
270
271 if (!file)
272 return;
is that happeninig all the time?
a *very* stupid question - do you have /proc/cpuinfo file?
-ss