Sunday, May 19, 2019

Thermald and MCE error

I randomly kept getting the below errors in my Centos laptop. I installed thermald. It seems the error is fixed for now. Let's see. :)

Message from syslogd@llovizna-lenovo at Apr 17 14:29:02 ...
 kernel:mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 5: ee0000000040110a

Message from syslogd@llovizna-lenovo at Apr 17 14:29:02 ...
 kernel:mce: [Hardware Error]: TSC 0 ADDR fef81fc0 MISC 78a0000086

Message from syslogd@llovizna-lenovo at Apr 17 14:29:02 ...
 kernel:mce: [Hardware Error]: PROCESSOR 0:40651 TIME 1555525734 SOCKET 0 APIC 0 microcode 24

Message from syslogd@llovizna-lenovo at Apr 17 14:29:02 ...
 kernel:mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 6: ee0000000040110a

Message from syslogd@llovizna-lenovo at Apr 17 14:29:02 ...
 kernel:mce: [Hardware Error]: TSC 0 ADDR fef82100 MISC 78a0000086

Message from syslogd@llovizna-lenovo at Apr 17 14:29:02 ...
 kernel:mce: [Hardware Error]: PROCESSOR 0:40651 TIME 1555525734 SOCKET 0 APIC 0 microcode 24







$  dmesg | grep -i 'mce:'
[    0.023131] mce: CPU supports 7 MCE banks
[    1.037974] mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 6: ae0000000040110a
[    1.038009] mce: [Hardware Error]: TSC 0 ADDR fef87380 MISC 278a0000086
[    1.038033] mce: [Hardware Error]: PROCESSOR 0:40651 TIME 1555486489 SOCKET 0 APIC 0 microcode 24
[  300.672620] mce: [Hardware Error]: Machine check events logged
[24841.300647] mce: [Hardware Error]: Machine check events logged
[24841.300730] mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 5: ee0000000040110a
[24841.300735] mce: [Hardware Error]: TSC 0 ADDR fef81fc0 MISC 78a0000086
[24841.300739] mce: [Hardware Error]: PROCESSOR 0:40651 TIME 1555525734 SOCKET 0 APIC 0 microcode 24
[24841.300743] mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 6: ee0000000040110a
[24841.300747] mce: [Hardware Error]: TSC 0 ADDR fef82100 MISC 78a0000086
[24841.300750] mce: [Hardware Error]: PROCESSOR 0:40651 TIME 1555525734 SOCKET 0 APIC 0 microcode 24


Thursday, May 9, 2019

Hosting a RIPE ATLAS Probe in Atlanta

My RIPE ATLAS Probe
I used RIPE Atlas for my Internet measurements in my IFIP Networking 2018 paper (NetUber: A cloud-assisted overlay network as an alternative connectivity provider) and consequently my thesis. I consumed the RIPE Atlas credits from my co-author for those experiments. Afterward, I requested RIPE to send me a probe, and now I have received it! I have connected it to my home router. My probe is currently connected to the RIPE Atlas network and started receiving traffic. I am happy to contribute back to the Internet measurements community!

Saturday, May 4, 2019

My EMJD-DC Erasmus Mundus Journey

View from my apartment in Rijeka, Croatia
My Ph.D. started 19 days before my MSc. defense. :) I got the happy news that I had received the Category "A" EMJD-DC Erasmus Mundus Scholarship, while I was attending the EMDC Winter Event in Evora. I started with IST, ULisboa, Portugal, as my first university. I continued with my MSc supervisor as my Ph.D. advisor also, as he is really a great supervisor and mentor.

Following my MSc defense, my Ph.D. started smoothly. I finished all my course requirements for the first year. I also went to the University of Rijeka, Croatia, for a short-term scientific mission (STSM). It was fun, spending the summer in Rijeka. I also had the chance to visit nearby countries (Italy, Slovenia, and Serbia) by bus, for a very low price. On the other hand, my stay in Croatia was also very productive. My research work there became a core of my thesis.

Night walk from KAUST
I did 2 Google Summer of Code (GSoC) from Portugal. Once during my MSc (2014) and the other during my Ph.D. (2015). I also did an OpenDaylight internship. Then I moved to Atlanta for 7 months for an extended internship at Emory University, as a continuation of my GSoCs. When I returned from Atlanta to Lisbon, I had to apply for the Belgium visa quick since I was already in my third year and I must move to my second university (UCLouvain) in Belgium. After a short period of 4 months in Lisboa, we moved to Louvain-la-Neuve, Belgium in February 2017. Later in 2017, I also spent 2 months in KAUST, Saudi Arabia, the 5th university of my Ph.D. Finally, I returned to Portugal for my 4th-year 2nd semester, December 2017. In the next 6 months, I made sure to satisfy all the thesis requirements of IST and UCLouvain, including the UCLouvain Thesis Confirmation and IST CAT. I also finished the thesis draft and moved to Emory University again before the defense. 

Evora, Portugal
There are a few things I could have done better. For instance, looking back, I feel I should have defended the thesis before moving out of the EU. It was just defense pending, and moving away from the EU made the process much longer. Similarly, I also think I should have started writing the thesis early on, making sure the LaTex variables across my various papers do not have naming conflicts. That would have helped me when I consolidated the content from my various papers to the thesis document. But I am still happy with how everything went. Next is to defend my thesis in 2019 July. I am looking forward to it.