CPU and I cant move my mouse. This story begins, as they so often do, when I noticed that my machine was behaving poorly. My Windows 1. 0 work machine has 2. It has 6. 4 GB of RAM and that was less than half used. It has a fast SSD that was mostly idle. Freeware Rodents Revenge download. As a mouse, outsmart the cat and trap it by pushing blocks. Latest trending topics being covered on ZDNet including Reviews, Tech Industry, Security, Hardware, Apple, and Windows. You have not yet voted on this site If you have already visited the site, please help us classify the good from the bad by voting on this site. Diablo III is a hack and slash action roleplaying video game developed and published by Blizzard Entertainment. It is the third installment in the Diablo franchise. Rrx33asF4p6TP5TZmai0r_YxuHahOjKlZy9EExUIPZnFakJGs_XOFz5ssFj794qpQ=h310' alt='Download Windows 98 Mouse Trap Game' title='Download Windows 98 Mouse Trap Game' />The web game displays actual news stories that have been published around the web, along with source information. Your job is to determine whether what youre. But the absolute best thing about Craft is that when teamed up with another Flowenabled device like Logitechs MX Master 2S mouse, it completely eliminates the. Download Panda Craze Gold today, or play this and 2400 other top games online for free at GameHouse. Tabtight professional, free when you need it, VPN service. Certified Software Quality Engineer Pdf Files. Cheatbook your source for Cheats, Video game Cheat Codes and Game Hints, Walkthroughs, FAQ, Games Trainer, Games Guides, Secrets, cheatsbook. Mouse-Trap-Free.jpg' alt='Download Windows 98 Mouse Trap Game' title='Download Windows 98 Mouse Trap Game' />And yet, as I moved the mouse around it kept hitching sometimes locking up for seconds at a time. Update a video showing how to see if the bug is fixed can be found here, and the bug is fixed in the 1. So I did what I always do I grabbed an ETW trace and analyzed it. The result was the discovery of a serious process destruction performance bug in Windows 1. The ETW trace showed UI hangs in multiple programs. I decided to investigate a 1. Task Manager In the image below you can see CPU usage for the system during the hang, grouped by process name notice that total CPU usage rarely goes above 5. The CPU Usage Precise table showed that Task Managers UI thread was repeatedly blocked on calls to functions like Send. Message. W, apparently waiting on a kernel critical region which are the kernel mode version of critical sections, deep in the call stack in win. Enter. Crit not shown I manually followed the wait chain through a half dozen processes to see who was hogging the lock. My notes from the analysis look something like this Taskmgr. Msg. Check. Delay on thread 6. Longest delay was 1. Enter. Crit, readied by conhost. Tab. Tip. exe 8. UIfor. ETW. exe 7. I had to keep going because most of the processes were releasing the lock after holding it for just a few microseconds. But eventually I found several processes the gomacc. Or, at least, they were readied by somebody holding the lock and then a few hundred microseconds later they readied somebody else by releasing the lock. These processes were all releasing the lock from within Nt. Gdi. Close. Process. I was tired of manually following these wait chains so I decided to see if the same readying call stack was showing up a lot of times. I did that by dragging the Ready Thread Stack column to the left and searching the column for Nt. Gdi. Close. Process. I then used WPAs View Callers By Function option to show me all of the Ready Thread Stacks that went through that function in this view the stack roots are at the bottom There were 5,7. Nt. Gdi. Close. Process was on the Ready Thread Stack, each one representing a time when the critical region was released. The threads readied on these call stacks had been waiting a combined total of 6. And, if each of these readying events happened after the thread had held the lock for just 2. Im not familiar with this part of Windows but the combination of Psp. Exit. Thread and Nt. Gdi. Close. Process made it clear that this behavior was happening during process exit. This was happening during a build of Chrome, and a build of Chrome creates a lot of processes. I was using our distributed build system which means that these processes were being created and destroyed quite quickly. The next step was to find out how much time was being spent inside of Nt. Gdi. Close. Process. So I moved to the CPU Usage Sampled table in WPA and got a butterfly graph, this time of callees of Nt. Gdi. Close. Process. You can see from the screen shot below that over a 1. Nt. Gdi. Close. Process, representing 9. Anytime you have a lock that is held more than 9. Tenali Raman Stories In Tamil Pdf there. Get. Message or update the mouse position. In order to experiment better I wrote a test program that creates 1,0. The CPU usage of this test program on my four core eight thread home laptop, grouped by process name, can be seen below Well, what do you know. Process creation is CPU bound, as it should be. Process shutdown, however, is CPU bound at the beginning and the end, but there is a long period in the middle about a second where it is serialized using just one of the eight hyperthreads on the system, as 1,0. Nt. Gdi. Close. Process. This is a serious problem. This period represents a time when programs will hang and mouse movements will hitch and sometimes this serialized period is several seconds longer. Id noticed that this problem seems to be worse when my computer has been running for a while so I rebooted and ran the test as soon as my laptop had settled down. The process shutdown serialization is indeed less severe, but the issue is still clearly present on the freshly rebooted machine I then ran the same test on an old Windows 7 machine Intel Core 2 Q8. Process creation is slower, as you would expect from a much slower CPU, but process destruction is as fast as my new laptop at its best, and is fully parallelized. This tells us that this serialization on process shutdown is a new issue, introduced sometime between Windows 7 and Windows 1. Amdahls law says that if you throw enough cores at your problem then the parts that cannot be parallelized will eventually dominate execution. When my work machine has been heavily used for a few days this serialization issue gets bad enough that process shutdown becomes a significant part of my distributed build times and more cores cant help with that. In order to get maximum build speeds and if I want to move my mouse while doing builds I need to reboot my machine every few days. Even then my build speeds are not as fast as they should be, and Windows 7 starts to look tempting. In fact, adding more cores to my workstation makes the UI less responsive. That is because Chromes build system is smart enough to spawn more processes if you have more cores, which means that there are more terminating processes fighting over the global lock. So its not just 2. CPU and I cant move my mouse its 2. CPU and therefore I cant move my mouse. This problem has been reported to Microsoft and they are investigating. Just one more thingThis is what what my process create test program looks like when run on my 2. See that tiny horizontal red line on the bottom right Thats Amdahls law visualized, as 9. CPU resources sit idle for almost two seconds, while process destruction hogs the lock that I need in order to move the mouse. Resources. The Process. Create. Tests code is available here. Deeper investigation of the functions that hog the lock was done in a follow up post here, including an understanding of the likely root cause of this new problem. A video showing how to investigate this bug can be found here. Discussions of this post can be found at https news. If you liked this post you might like these other investigative reporting posts Self Inflicted Denial of Service in Visual Studio Search.