monitor

I'm wondering how to go about monitoring network traffic on my Mac. Like the way activity monitor does it, showing the bytes / packets in and out. I know it's a bit vague, but I'm unsure of the best place to start. EDIT: I'm wanting to do this in code, not use an existing piece of software. I just found the open source project, MenuMeters . It's got exactly what I'm looking for. You may want to look into programming with pcap . That's the library which drives tcpdump. Marcelo Cantos Use tcpdump for quick-n-dirty low-level command-line monitoring, and wireshark for the kitchen sink. OTOH, if

I find that after running or debugging my application a few times using eclipse, that I get the above output in my console (in red) and I get no feedback from Dalvik as to the connection status to my phone is going. My application will still debug etc. I just get nothing useful in my Console. Any ideas how to fix this? It appears intermittent. It starts doing it after a few minutes, continues to do it for quite a while and occasionally goes away again. This has happened on my last laptop and now on my new laptop with a completely fresh install etc. ok so here's what fixed it for me and I think

It seems that these code snippets ought to behave identically: 1: Monitor.TryEnter(object) if (Monitor.TryEnter(lockObject)) { try { DoSomething(); } finally { Monitor.Exit(lockObject); } } 2: Monitor.TryEnter(object, ref bool) - introduced in .NET 4.0 bool lockAcquired; try { Monitor.TryEnter(lockObject, ref lockAcquired); if (lockAcquired) { DoSomething(); } } finally { if (lockAcquired) { Monitor.Exit(lockObject); } } I see from the MSDN documentation on the overload taking a ref bool parameter : If the lock was not taken because an exception was thrown, the variable specified for the

Is there a way to get the information about connected monitors and displays and their resolutions via the terminal in OS X? I have some installations that run on multiple monitors and sometimes with a GFLW window that seem to not open if a monitor is not attached - I would like to have a check for whether a monitor is attached properly and maybe dump that to a log file, but I haven't found a programmatic way to do that without getting deep into Obj-C/Cocoa You can use system_profiler SPDisplaysDataType or defaults read /Library/Preferences/com.apple.windowserver.plist : $ system_profiler

It is generally accepted (I believe!) that a lock will force any values from fields to be reloaded (essentially acting as a memory-barrier or fence - my terminology in this area gets a bit loose, I'm afraid), with the consequence that fields that are only ever accessed inside a lock do not themselves need to be volatile . (If I'm wrong already, just say!) A good comment was raised here , questioning whether the same is true if code does a Wait() - i.e. once it has been Pulse() d, will it reload fields from memory, or could they be in a register (etc). Or more simply: does the field need to be

在成功部署openstack集群后，为了需要实时掌握集群的运行情况，需要部署一套监控系统，以了解系统的运行情况，对于监控系统有很多开源软件功能上都很强大，例如nagios、cacti、zabbix，尤其是zabbix的功能，不过功能强大了配置起了也就麻烦了，现在 介绍一个监控组合: munin和collect。munin用来监控compute，对于vm实例使用munin和collect，munin可以监控一些系统的运行情况：cpu、内存、disk之类的。collect则可以监控实例上的一些应用层服务。这两个软件都有一个特点就是部署起来方便，不需要设置过多的参数就可以出效果图。 munin部署环境 munin是由master和agent构成的，agent收集数据发送到master，master把这些数据存贮到rrd中，然后通过图片显示出来。 本篇文章中munin使用环境：ubuntu12.04、ubuntu12.10、debian6 master运行在ubuntu12.04上面，客户端运行在ubuntu12.10和debian6，所有安装采用apt安装，ubuntu12.04 munin版本为1.4.6、ubuntu12.10 munin版本为2.0.2、debian6 munin版本为1.4.5。 munin服务端(10.1.6.104)安装 apt-get -y install

I'd like to create a virtual monitor driver for OS X. What I mean by virtual is a monitor driver that does not drive an attached monitor, yet fools OS X into thinking there is such a monitor attached. The purpose? It can tunnel display data to some other device over some other protocol, say VNC. I believe this has been done before in one form or another (perhaps those apps that turn your iPad into a secondary display). Any coding/kernel hackery pointers on this would be appreciated! After days and days of attempts, I found http://code.google.com/p/ioproxyvideofamily/ which works like a charm.