The Big Kernel Lock was designed to only allow one CPU in a multiprocessor system to access the kernel at a time. This wasn't too bad for a two core system, but it becomes a very big problem when multiple CPU's are in use. In a large SMP system(say a rack of 4 core Intel Xeon's), all processes/threads on all 16+ CPU's could end up halting while waiting for one system call on one CPU to complete.
And the reasons for each CPU wishing access to the kernel might be for a completely different reason. One CPU might be wanting to access the hard disk drive, while another is making a shared-memory request, and yet another is sending data to the network card.
If the BKL is broken up and replaced by a lock for each subsystem, then the latency problem can be eliminated. Though, there is the risk of deadlock where any CPU held more than one lock at any time.
If eventually the universe was completely described, what use would there be for science?
To use this knowledge to achieve particular goals; storing information in the smallest possible space; minimizing commute times using the least amount of energy.
Once we knew how the underlying physics of the universe worked, maybe we could explore greater distances.
That sounds just like something straight out of the Allagamoosa novel by Eric Frank Russell. At least they weren't told that it had disintegrated due to gravitational pressure waves.
You will get the GRUB boot lading screen after the manufacturer flash screen, which will give you a few seconds to use the default OS, or to choose which partition to boot from.
Even worse now, some of the Fedora login screens now list the names and icons of all the users known in the password file. In the past, you just had a Google style single line for the username, then the password.
Probably the sweet smell given off by the sealant used to prevent circuit boards from rusting, if not the components themselves (capacitors, coils etc..)
Even a rinsed out soft drinks can has enough sugar to attract ants.
Some of ex-navy folks in the UK have stories like that. One story that I heard about was the Russian submarine that was watching a NATO exercise and accidently strayed in front of another submarine which was using active sonar. The sonar reading read that there was a submarine less than 10 metres away. and was now ringing like a bell.
There was once a court case in which a burglar sued a French property owner who had used a webcam/CCTV to protect his home. Apparently, the owner hadn't placed warning signs on his property, and so the burglar's human rights had been violated by this unauthorised photography.
Have a look at Track Me Not. It is a Firefox plugin which acts as a spider crawling through the web in the background. In this way, it scrambles any profile that spyware vendors like Phorm try to build up.
You need a plugin to block a cookie? Yes, because Phorm deletes their cookies after two years. You have to visit their web-page or something similar in order stop them providing "context-based adverts". Even then, they are still building up a keyword profile of you based upon the web pages you have downloaded.
I certainly do not wish to be bombarded with adverts on outdoor shooting if I read human rights articles. Nor do I wish to have vermin removal adverts if I start looking for a new multi-function input device. Or even camping and holiday adverts, simply because I am reading historical literature. This is just as a bad as those web-pages where every Noun becomes a green instant pop-up hyperlink to some advertising pages.
The following web site contains some scripts which do self-analysis/ checksum calculations to determinwe whether they have been interfered unlawfully with:
I can imagine the packager thinking, "Why would a encryption software module need the user to swizzle the mouse around a bit? Must be a piece of test code - I'll #ifdef it out, and if anyone complains, I'll remove the #ifdef's again."
There was a lawsuit story some time ago about a Las Vegas casino vs. a regular punter, over the use of a blackjack game. The punter had found a cabinet unit with a frazzled RNG, so it kept dealing the same sequence of cards every time. The punter managed to memorize the sequence, thus guaranteeing a win every time. Of course, the casino wasn't too happy about this.
That worked for me - I recovered an entire hard disk drive (Hitachi Travelstar) using the freeze and sudden twist method. Basically you freeze the hard disk drive to get whatever it is that sticks, to become brittle, and then give the drive a sudden twist to free the platters. This will last as long as the drive motor keeps running. Blogosphere theory is that it is the oil from the platter bearings that leaks and hardens.
Can the ISPs afford to give encrypted traffic a very low priority?
Definitely not. If people find that their online web purchases fail to complete because some marketing executron has decided to put shttp protocols in the slow lane, word will soon get round on the consumer newsgroups.
It's the same in accounting - somebody did a study on the distribution on workloads, and found that when the workloads was low, accountants would simply take whatever task was available, split it up, go off and do their part of the task for half the day, then spend the other half of the day collating the results back together. A single person would have had the work completed in half a day. In the end, they spend more time shuffling papers to and from each other, rather than actually doing the work.
It's absolutely mind-boggling to type 'free' in a Linux system, and find out that 800 Megabytes of 1 Gigabytes is in use, with just the Desktop and browser in use.
Orange mobile have a large blimp that they fly around major sports events in the UK. Rather obviously, the blimp is orange in color and has the word "Orange" written on the side.
The red and green ranges of the spectrum are reduced under seawater. So you see a higher contrast in the blue range. M
It's the same with pebbles - when they are dry, they are just stones, but once wet, light greys become black, and you see all the specks and lines of minerals.
Higher dot pitches, more bits per pixel sample (even floating-point displays, higher contrast between black and white colors, larger framebuffer resolution, larger monitor size, 3D focus-to-infinity/stereo views without the need for headsets.
Maybe even laptops with twin LCD displays, that could be folded outwards, along with a keyboard with a foldout numeric keypad.
Slashdot Mirror
The Big Kernel Lock was designed to only allow one CPU in a multiprocessor system to access the kernel at a time. This wasn't too bad for a two core system, but it becomes a very big problem when multiple CPU's are in use. In a large SMP system(say a rack of 4 core Intel Xeon's), all processes/threads on all 16+ CPU's could end up halting while waiting for one system call on one CPU to complete.
And the reasons for each CPU wishing access to the kernel might be for a completely different reason. One CPU might be wanting to access the hard disk drive, while another is making a shared-memory request, and yet another is sending data to the network card.
If the BKL is broken up and replaced by a lock for each subsystem, then the latency problem can be eliminated. Though, there is the risk of deadlock where any CPU held more than one lock at any time.
If eventually the universe was completely described, what use would there be for science?
To use this knowledge to achieve particular goals; storing information in the smallest possible space; minimizing commute times using the least amount of energy.
Once we knew how the underlying physics of the universe worked, maybe we could explore greater distances.
That sounds just like something straight out of the Allagamoosa novel by Eric Frank Russell.
At least they weren't told that it had disintegrated due to gravitational pressure waves.
Some companies have a zero tolerance policy towards pr0n on company property. Have absolutely no pr0n should not be suspicious.
--
You will get the GRUB boot lading screen after the manufacturer flash screen, which will give you a few seconds to use the default OS, or to choose which partition to boot from.
Even worse now, some of the Fedora login screens now list the names and icons of all the users known in the password file. In the past, you just had a Google style single line for the username, then the password.
Probably the sweet smell given off by the sealant used to prevent circuit boards from rusting, if not the components themselves (capacitors, coils etc..)
Even a rinsed out soft drinks can has enough sugar to attract ants.
Some of ex-navy folks in the UK have stories like that. One story that I heard about was the Russian submarine that was watching a NATO exercise and accidently strayed in front of another submarine which was using active sonar. The sonar reading read that there was a submarine less than 10 metres away. and was now ringing like a bell.
There was once a court case in which a burglar sued a French property owner who had used a webcam/CCTV to protect his home. Apparently, the owner hadn't placed warning signs on his property, and so the burglar's human rights had been violated by this unauthorised photography.
Have a look at Track Me Not. It is a Firefox plugin which acts as a spider crawling through the web in the background. In this way, it scrambles any profile that spyware vendors like Phorm try to build up.
I certainly do not wish to be bombarded with adverts on outdoor shooting if I read human rights articles. Nor do I wish to have vermin removal adverts if I start looking for a new multi-function input device. Or even camping and holiday adverts, simply because I am reading historical literature. This is just as a bad as those web-pages where every Noun becomes a green instant pop-up hyperlink to some advertising pages.
The following web site contains some scripts which do self-analysis/ checksum calculations to determinwe whether they have been interfered unlawfully with:
Corruption detection scripts
I can imagine the packager thinking, "Why would a encryption software module need the user to swizzle the mouse around a bit? Must be a piece of test code - I'll #ifdef it out, and if anyone complains, I'll remove the #ifdef's again."
There was a lawsuit story some time ago about a Las Vegas casino vs. a regular punter, over the use of a blackjack game. The punter had found a cabinet unit with a frazzled RNG, so it kept dealing the same sequence of cards every time. The punter managed to memorize the sequence, thus guaranteeing a win every time. Of course, the casino wasn't too happy about this.
Fluid Dynamic Bearing Spindle Motors: Their future in hard disk drives
Absolutely. The cost of an external 250GB USB hard drive is around $160, so it's a lot cheaper to just do a quick 'tar' every day.
That worked for me - I recovered an entire hard disk drive (Hitachi Travelstar) using the freeze and sudden twist method. Basically you freeze the hard disk drive to get whatever it is that sticks, to become brittle, and then give the drive a sudden twist to free the platters. This will last as long as the drive motor keeps running. Blogosphere theory is that it is the oil from the platter bearings that leaks and hardens.
Can the ISPs afford to give encrypted traffic a very low priority?
Definitely not. If people find that their online web purchases fail to complete because some marketing executron has decided to put shttp protocols in the slow lane, word will soon get round on the consumer newsgroups.
It's the same in accounting - somebody did a study on the distribution on workloads, and found that when the workloads was low, accountants would simply take whatever task was available, split it up, go off and do their part of the task for half the day, then spend the other half of the day collating the results back together. A single person would have had the work completed in half a day. In the end, they spend more time shuffling papers to and from each other, rather than actually doing the work.
Maybe she could go into research for computer user-interface/user-interaction research?
That seems to be an important area now that every piece of hardwares seems to have a visual GUI.
It's absolutely mind-boggling to type 'free' in a Linux system, and find out that 800 Megabytes of 1 Gigabytes is in use, with just the Desktop and browser in use.
total used free shared buffers cached
Mem: 1032772 888948 143824 0 66088 397432
-/+ buffers/cache: 425428 607344
Swap: 1052216 323804 728412
White :)
I understand airline pilots refer to their passengers as "the self-loading freight".
Orange mobile have a large blimp that they fly around major sports events in the UK. Rather obviously, the blimp is orange in color and has the word "Orange" written on the side.
The red and green ranges of the spectrum are reduced under seawater. So you see a higher contrast in the blue range. M
It's the same with pebbles - when they are dry, they are just stones, but once wet, light greys become black, and you see all the specks and lines of minerals.
Higher dot pitches, more bits per pixel sample (even floating-point displays, higher contrast between black and white colors, larger framebuffer resolution, larger monitor size, 3D focus-to-infinity/stereo views without the need for headsets.
Maybe even laptops with twin LCD displays, that could be folded outwards, along with a keyboard with a foldout numeric keypad.