I had a similar problem with certain hardware configs causing a kworker to hog the CPU due to ACPI problems
I found the tips here helpful in solving that one https://bbs.archlinux.org/viewtopic.php?id=184913 Sent from iPhone > On 5 Feb 2015, at 22:18, Bhasker C V <bhas...@unixindia.com> wrote: > > Hi, > > I am trying to create 2 systems (both are portable and works on USB) > > 1. USB<->SATA bridge SSD with linux kernel 3.19.0 (self compiled). > this systems works fine and the operating temperature on the DELL > machine I am using is about 54C to 60C > > 2. USB<->microSD with MicroSD card (sandisk 32GB). > this system when it works starts heating up !!! temperatures sore > to 80C.(in a matter of 2-3 minutes) > > BASE CONDITIONS (common for both systems): > * Both the systems are jessie > * Both are running idential kernel and initrd (infact exact binary > copies on both) > * top shows very low CPU utilisation > * iotop shows occasional R/W but not too much of write/read (less > than 0.1 kb/sec) > * both are currently text mode only > * system is DELL Q15R core-i7-2630QM (see cpuinfo in the end) > > on SSD: vmstat > > 0 0 0 7003648 44012 896832 0 0 0 12 157 583 1 > 0 99 0 0 > 0 0 0 7003532 44012 896840 0 0 0 0 136 429 0 > 0 100 0 0 > 0 0 0 7003760 44012 896840 0 0 0 0 205 510 0 > 0 100 0 0 > 0 0 0 7003904 44012 896840 0 0 0 0 152 513 0 > 0 100 0 0 > (using graphics and so sligtly low in mem but this is on the system > which does not heat up) > > on SDCARD: vmstat > > 0 0 0 7935012 20884 184812 0 0 0 0 110 313 0 > 0 100 0 0 > 0 0 0 7935012 20884 184812 0 0 0 0 97 286 0 > 0 100 0 0 > 0 0 0 7935012 20884 184812 0 0 0 0 99 275 0 > 0 100 0 0 > 0 0 0 7935012 20884 184812 0 0 0 0 103 280 0 > 0 100 0 0 > 0 0 0 7934864 20892 184804 0 0 0 20 176 470 0 > 0 100 0 0 > > > I even applied all CPU microcodes and got the message > perf_event_intel: PEBS enabled due to microcode update > > > Has someone encountered this before ? I am not sure what is causing > the fans to run fast and CPU to heatup when I use the OS on SD card ? > I agree SD is slow but that will be IO rather than CPU right ? will > that cause heatup ? > > iotop also shows READ/WRITE only occasionally SSD for > I am fully exhausted not kwowing what to do. Can anyone help please ? > > > -------------------- CPU INFO ----------------------- > processor : 7 > vendor_id : GenuineIntel > cpu family : 6 > model : 42 > model name : Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz > stepping : 7 > microcode : 0x29 > cpu MHz : 1900.000 > cache size : 6144 KB > physical id : 0 > siblings : 8 > core id : 3 > cpu cores : 4 > apicid : 7 > initial apicid : 7 > fdiv_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 13 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov > pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx rdtscp lm > constant_tsc arch_perfmon pebs bts xtopology nonstop_tsc aperfmperf > eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 > xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes > xsave avx lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi > flexpriority ept vpid xsaveopt > bugs : > bogomips : 3990.87 > clflush size : 64 > cache_alignment : 64 > address sizes : 36 bits physical, 48 bits virtual > power management: > > > -- > To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org > with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org > Archive: > https://lists.debian.org/CAPLCSGCA3+NXH3o07Zz9G+=CCVbYMWjnRnLzdWJf44H1xHc=k...@mail.gmail.com > -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/9d9f79fa-9f26-482c-b6a4-a54869af7...@perpetualmotion.co.uk
