HP laptop slowdown with AC adapter

I had been experienced for a long long time that my HP probook laptop keep running terribly slow from time to time, that I can’t event open the menu of Firefox, any operation will eat most CPU time and idle process CPU time always lower than 50% . Also there are some serious symptoms appear in windows event log:

Event ID 37

The speed of processor 1 in group 0 is being limited by system firmware. The processor has been in this reduced performance state for 53 seconds since the last report.

Event ID 46

Processor 3 in group 0 exposes the following:

2 idle state(s)
14 performance state(s)
8 throttle state(s)

Those  messages kept appearing, Google can’t seek much useful info, that the most possible situation is hardware damaged. I agree with that but no one could tell exactly which part is malfunctioned. I changed a CPU, with same type, I3 390M, no use. I reinstall OS but the moment new OS took breaths, the old odd problems came back like a ghost. I guest that maybe it is not the CPU maybe BIOS, but HP BIOS leave only poor options to make some  changes.  Many suggestions are to adjust power option, prevent CPU from running into  limit freq mode, but that also not work for me, either.

With windows system internal explorer, disable any services that eat CPU, I found that it looks like the DPC (delay procedure call) and interrupt took about 0.5%-5% CPU time, a little more time than it should be. I think that is too much, so I ran low level test program LatencyMon. It shows that lots of latency from some drivers and interrupt. OK, that is the cause of system slowdown, but what should I do? I still don’t know what is damaged or which driver is improperly installed, all from published by Microsoft.

Just when I considering throw this garbage into dustbin, here comes the resume. I always using this laptop with AC adapter, but one day,  when I unplugged the adapter, I suddenly found that laptop became sharp again, every come back to mornal, everything felt so smooth, now I know what the F is going on.

Here is output form LatencyMon

using battery:
_________________________________________________________________________________________________________
CPU SPEED
_________________________________________________________________________________________________________
Reported CPU speed:                                   2666.0 MHz
Measured CPU speed:                                   1001.0 MHz (approx.)
_________________________________________________________________________________________________________
MEASURED INTERRUPT TO USER PROCESS LATENCIES
_________________________________________________________________________________________________________
Highest measured interrupt to process latency (µs):   27257.342909
Average measured interrupt to process latency (µs):   9.683204
Highest measured interrupt to DPC latency (µs):       205.439027
Average measured interrupt to DPC latency (µs):       1.259948
_________________________________________________________________________________________________________
REPORTED ISRs
_________________________________________________________________________________________________________
Interrupt service routines are routines installed by the OS and device drivers that execute in response to a hardware interrupt signal.

Highest ISR routine execution time (µs):              131.155289
Driver with highest ISR routine execution time:       ataport.SYS – ATAPI Driver Extension, Microsoft Corporation

Highest reported total ISR routine time (%):          0.049321
Driver with highest ISR total time:                   hal.dll – Hardware Abstraction Layer DLL, Microsoft Corporation

Total time spent in ISRs (%)                          0.072558

ISR count (execution time <250 µs):                   87910
ISR count (execution time 250-500 µs):                0
ISR count (execution time 500-999 µs):                0
ISR count (execution time 1000-1999 µs):              0
ISR count (execution time 2000-3999 µs):              0
ISR count (execution time >=4000 µs):                 0

_________________________________________________________________________________________________________
REPORTED DPCs
_________________________________________________________________________________________________________
Highest DPC routine execution time (µs):              267.954614
Driver with highest DPC routine execution time:       ACPI.sys – ACPI Driver for NT, Microsoft Corporation

Highest reported total DPC routine time (%):          0.169968
Driver with highest DPC total execution time:         rspLLL64.sys – Resplendence Latency Monitoring and Auxiliary Kernel Library, Resplendence Software Projects Sp.

Total time spent in DPCs (%)                          0.387157

DPC count (execution time <250 µs):                   467966
DPC count (execution time 250-500 µs):                0
DPC count (execution time 500-999 µs):                4
DPC count (execution time 1000-1999 µs):              0
DPC count (execution time 2000-3999 µs):              0
DPC count (execution time >=4000 µs):                 0

_________________________________________________________________________________________________________
REPORTED HARD PAGEFAULTS
_________________________________________________________________________________________________________
Hard pagefaults are events that get triggered by making use of virtual memory that is not resident in RAM but backed by a memory mapped file on disk. The process of resolving the hard pagefault requires reading in the memory from disk while the process is interrupted and blocked from execution.

NOTE: some processes were hit by hard pagefaults. If these were programs producing audio, they are likely to interrupt the audio stream resulting in dropouts, clicks and pops. Check the Processes tab to see which programs were hit.

Process with highest pagefault count:                 none

Total number of hard pagefaults                       6
Hard pagefault count of hardest hit process:          3
Highest hard pagefault resolution time (µs):          19152.621155
Total time spent in hard pagefaults (%):              0.009589
Number of processes hit:                              0
_________________________________________________________________________________________________________
PER CPU DATA
_________________________________________________________________________________________________________
CPU 0 Interrupt cycle time (s):                       3.022050
CPU 0 ISR highest execution time (µs):                81.521005
CPU 0 ISR total execution time (s):                   0.184461
CPU 0 ISR count:                                      85072
CPU 0 DPC highest execution time (µs):                264.338710
CPU 0 DPC total execution time (s):                   0.931696
CPU 0 DPC count:                                      441177
_________________________________________________________________________________________________________
CPU 1 Interrupt cycle time (s):                       1.202737
CPU 1 ISR highest execution time (µs):                102.689797
CPU 1 ISR total execution time (s):                   0.018182
CPU 1 ISR count:                                      884
CPU 1 DPC highest execution time (µs):                244.097524
CPU 1 DPC total execution time (s):                   0.089548
CPU 1 DPC count:                                      5911
_________________________________________________________________________________________________________
CPU 2 Interrupt cycle time (s):                       0.861943
CPU 2 ISR highest execution time (µs):                131.155289
CPU 2 ISR total execution time (s):                   0.020119
CPU 2 ISR count:                                      982
CPU 2 DPC highest execution time (µs):                267.954614
CPU 2 DPC total execution time (s):                   0.140828
CPU 2 DPC count:                                      10137
_________________________________________________________________________________________________________
CPU 3 Interrupt cycle time (s):                       5.537322
CPU 3 ISR highest execution time (µs):                102.685671
CPU 3 ISR total execution time (s):                   0.021638
CPU 3 ISR count:                                      972
CPU 3 DPC highest execution time (µs):                264.816204
CPU 3 DPC total execution time (s):                   0.142011
CPU 3 DPC count:                                      10745
_________________________________________________________________________________________________________

latencymon_battery

Using AC adapter:

_________________________________________________________________________________________________________
CPU SPEED
_________________________________________________________________________________________________________
Reported CPU speed:                                   2666.0 MHz
Measured CPU speed:                                   1001.0 MHz (approx.)
_________________________________________________________________________________________________________
MEASURED INTERRUPT TO USER PROCESS LATENCIES
_________________________________________________________________________________________________________
Highest measured interrupt to process latency (µs):   36940.241051
Average measured interrupt to process latency (µs):   11.430942

Highest measured interrupt to DPC latency (µs):       4838.761084
Average measured interrupt to DPC latency (µs):       1.285947
_________________________________________________________________________________________________________
REPORTED ISRs
_________________________________________________________________________________________________________
Highest ISR routine execution time (µs):              1853.656414
Driver with highest ISR routine execution time:       USBPORT.SYS – USB 1.1 & 2.0 Port Driver, Microsoft Corporation

Highest reported total ISR routine time (%):          0.050281
Driver with highest ISR total time:                   hal.dll – Hardware Abstraction Layer DLL, Microsoft Corporation

Total time spent in ISRs (%)                          0.087438

ISR count (execution time <250 µs):                   601848
ISR count (execution time 250-500 µs):                0
ISR count (execution time 500-999 µs):                1
ISR count (execution time 1000-1999 µs):              5
ISR count (execution time 2000-3999 µs):              0
ISR count (execution time >=4000 µs):                 0
_________________________________________________________________________________________________________
REPORTED DPCs
_________________________________________________________________________________________________________
Highest DPC routine execution time (µs):              10688.889722
Driver with highest DPC routine execution time:       ACPI.sys – ACPI Driver for NT, Microsoft Corporation

Highest reported total DPC routine time (%):          0.162464
Driver with highest DPC total execution time:         rspLLL64.sys – Resplendence Latency Monitoring and Auxiliary Kernel Library, Resplendence Software Projects Sp.

Total time spent in DPCs (%)                          0.474645

DPC count (execution time <250 µs):                   3183218
DPC count (execution time 250-500 µs):                0
DPC count (execution time 500-999 µs):                218
DPC count (execution time 1000-1999 µs):              46
DPC count (execution time 2000-3999 µs):              12
DPC count (execution time >=4000 µs):                 0
_________________________________________________________________________________________________________
REPORTED HARD PAGEFAULTS
_________________________________________________________________________________________________________
Hard pagefaults are events that get triggered by making use of virtual memory that is not resident in RAM but backed by a memory mapped file on disk. The process of resolving the hard pagefault requires reading in the memory from disk while the process is interrupted and blocked from execution.

NOTE: some processes were hit by hard pagefaults. If these were programs producing audio, they are likely to interrupt the audio stream resulting in dropouts, clicks and pops. Check the Processes tab to see which programs were hit.

Process with highest pagefault count:                 firefox.exe

Total number of hard pagefaults                       82
Hard pagefault count of hardest hit process:          42
Highest hard pagefault resolution time (µs):          54719.405851
Total time spent in hard pagefaults (%):              0.019669
Number of processes hit:                              9
_________________________________________________________________________________________________________
PER CPU DATA
_________________________________________________________________________________________________________
CPU 0 Interrupt cycle time (s):                       22.060069
CPU 0 ISR highest execution time (µs):                1848.877719
CPU 0 ISR total execution time (s):                   1.325415
CPU 0 ISR count:                                      571424
CPU 0 DPC highest execution time (µs):                4321.660915
CPU 0 DPC total execution time (s):                   6.839788
CPU 0 DPC count:                                      2954846
_________________________________________________________________________________________________________
CPU 1 Interrupt cycle time (s):                       8.162236
CPU 1 ISR highest execution time (µs):                1853.656414
CPU 1 ISR total execution time (s):                   0.202151
CPU 1 ISR count:                                      10097
CPU 1 DPC highest execution time (µs):                6495.461365
CPU 1 DPC total execution time (s):                   1.045839
CPU 1 DPC count:                                      58885
_________________________________________________________________________________________________________
CPU 2 Interrupt cycle time (s):                       6.892908
CPU 2 ISR highest execution time (µs):                1394.983496
CPU 2 ISR total execution time (s):                   0.214699
CPU 2 ISR count:                                      10241
CPU 2 DPC highest execution time (µs):                6415.545386
CPU 2 DPC total execution time (s):                   1.518077
CPU 2 DPC count:                                      89777
_________________________________________________________________________________________________________
CPU 3 Interrupt cycle time (s):                       30.317668
CPU 3 ISR highest execution time (µs):                199.181170
CPU 3 ISR total execution time (s):                   0.222712
CPU 3 ISR count:                                      10092
CPU 3 DPC highest execution time (µs):                10688.889722
CPU 3 DPC total execution time (s):                   1.262933
CPU 3 DPC count:                                      79992
_________________________________________________________________________________________________________

latencymon

It is lucky for just replace a cheap 10$ AC adapter rather than a new laptop, to fix this unbearable problem. The malfunctioned adapter worked “fine”,  no much heat, voltage looks good, but both Microsoft and HP failed to catch the point although it announces it is broken times and times.

I am so disappoint for HP, and I would never buy any HP product again, that is the last what I want to say.

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