Comments for Steve Huston's Networked Programming Blog http://stevehuston.wordpress.com Making nets work Fri, 25 Sep 2009 21:21:12 +0000 http://wordpress.com/ hourly 1 Comment on Revised ACE_Dev_Poll_Reactor Fixes Multithread Issues (and more!) on Linux by stevehuston http://stevehuston.wordpress.com/2009/06/15/revised-ace_dev_poll_reactor-fixes-multithread-issues-and-more-on-linux/#comment-57 stevehuston Fri, 25 Sep 2009 21:21:12 +0000 http://stevehuston.wordpress.com/?p=74#comment-57 Ok, thanks Herb... there's clearly something going wrong somewhere. I've been very busy with customers, but if you and Sergio can get together and work out a fix, I'll try to help apply it when I have free time. Or, if a customer raises this issue it'll get attention quickly. Ok, thanks Herb… there’s clearly something going wrong somewhere. I’ve been very busy with customers, but if you and Sergio can get together and work out a fix, I’ll try to help apply it when I have free time. Or, if a customer raises this issue it’ll get attention quickly.

]]> Comment on Revised ACE_Dev_Poll_Reactor Fixes Multithread Issues (and more!) on Linux by Herb Gillman http://stevehuston.wordpress.com/2009/06/15/revised-ace_dev_poll_reactor-fixes-multithread-issues-and-more-on-linux/#comment-56 Herb Gillman Fri, 25 Sep 2009 21:06:58 +0000 http://stevehuston.wordpress.com/?p=74#comment-56 I too am seeing this odd behavior with the dev_poll reactor. Its bizzare. When I start my app, the top CPU utilization goes to > 100% even though nothing really is running. When I run under the debugger, all the Reactor thread's from my ThreadPool exit and everything appears to run on one thread on one CPU, the top CPU utilization on startup is 0 (as expected). I am running on AMD 3Ghz quad core boxes, one with Linux RHEL4.5 and one with Linux RHEL5.3 ACE version is 5.7.3-2 (downloaded and built from http://dist.bonsai.com/ken/ace_tao_rpm/SRC/) I too am seeing this odd behavior with the dev_poll reactor. Its bizzare. When I start my app, the top CPU utilization goes to > 100% even though nothing really is running. When I run under the debugger, all the Reactor thread’s from my ThreadPool exit and everything appears to run on one thread on one CPU, the top CPU utilization on startup is 0 (as expected).

I am running on AMD 3Ghz quad core boxes, one with Linux RHEL4.5 and one with Linux RHEL5.3
ACE version is 5.7.3-2 (downloaded and built from http://dist.bonsai.com/ken/ace_tao_rpm/SRC/)

]]> Comment on Revised ACE_Dev_Poll_Reactor Fixes Multithread Issues (and more!) on Linux by Sergio Ruiz http://stevehuston.wordpress.com/2009/06/15/revised-ace_dev_poll_reactor-fixes-multithread-issues-and-more-on-linux/#comment-50 Sergio Ruiz Thu, 02 Jul 2009 18:57:38 +0000 http://stevehuston.wordpress.com/?p=74#comment-50 Hi Steve, I've sent you the output from scall() and the one from my test app using ACE_TRACE. The trace shows a large number of sys calls to futex, probably related to the reactor's token. Thanks, Sergio Hi Steve,
I’ve sent you the output from scall() and the one from my test app using ACE_TRACE. The trace shows a large number of sys calls to futex, probably related to the reactor’s token.
Thanks,
Sergio

]]> Comment on When is it ok to use ACE Proactor on Linux? by stevehuston http://stevehuston.wordpress.com/2008/11/25/when-is-it-ok-to-use-ace-proactor-on-linux/#comment-49 stevehuston Thu, 02 Jul 2009 14:32:39 +0000 http://stevehuston.wordpress.com/?p=9#comment-49 Yes, Gokul, you are right. Solaris is better for two reasons: it doesn't suffer from the same "silently convert to synch" problem as Linux does, and there is a separate Proactor implementation on Solaris that takes advantage of Solaris's features better. Yes, Gokul, you are right. Solaris is better for two reasons: it doesn’t suffer from the same “silently convert to synch” problem as Linux does, and there is a separate Proactor implementation on Solaris that takes advantage of Solaris’s features better.

]]> Comment on When is it ok to use ACE Proactor on Linux? by Gokul http://stevehuston.wordpress.com/2008/11/25/when-is-it-ok-to-use-ace-proactor-on-linux/#comment-48 Gokul Thu, 02 Jul 2009 07:29:41 +0000 http://stevehuston.wordpress.com/?p=9#comment-48 Is it safe to user ACE Proactor in Solaris? I think there is a separate implementation in ACE to take advantage of the Asynchronous I/O implementation in Solaris. Is it safe to user ACE Proactor in Solaris? I think there is a separate implementation in ACE to take advantage of the Asynchronous I/O implementation in Solaris.

]]> Comment on Revised ACE_Dev_Poll_Reactor Fixes Multithread Issues (and more!) on Linux by stevehuston http://stevehuston.wordpress.com/2009/06/15/revised-ace_dev_poll_reactor-fixes-multithread-issues-and-more-on-linux/#comment-47 stevehuston Tue, 30 Jun 2009 14:46:30 +0000 http://stevehuston.wordpress.com/?p=74#comment-47 Hey Sergio... right, I saw your problem report on ace_users. This hasn't come up anywhere else, and I haven't had free time to examine the test program you sent. If you can help collect some profiling info to help narrow down the search that may help. Hey Sergio… right, I saw your problem report on ace_users. This hasn’t come up anywhere else, and I haven’t had free time to examine the test program you sent. If you can help collect some profiling info to help narrow down the search that may help.

]]> Comment on Why Apache Qpid’s C++ Build is Switching to CMake by stevehuston http://stevehuston.wordpress.com/2009/05/14/why-apache-qpids-c-build-is-switching-to-cmake/#comment-46 stevehuston Tue, 30 Jun 2009 14:42:01 +0000 http://stevehuston.wordpress.com/?p=58#comment-46 Thanks very much - glad to have you participating here. Thanks very much – glad to have you participating here.

]]> Comment on Revised ACE_Dev_Poll_Reactor Fixes Multithread Issues (and more!) on Linux by Sergio Ruiz http://stevehuston.wordpress.com/2009/06/15/revised-ace_dev_poll_reactor-fixes-multithread-issues-and-more-on-linux/#comment-44 Sergio Ruiz Fri, 26 Jun 2009 02:27:03 +0000 http://stevehuston.wordpress.com/?p=74#comment-44 Hi Steve, After I upgraded my server app from ACE 5.6.2 to 5.7, I noticed a high CPU utlization > 100%. My server uses multiple worker threads to run the ACE_Dev_Poll_Reactor. I got this behavior on CentOS 4.x and 5.x. My app works fine if I revert back to v5.6.2 or if I run it with TP_Reactor. Has anybody reported this issue yet? Any ideas what may be causing it? Thanks, Sergio. Hi Steve,
After I upgraded my server app from ACE 5.6.2 to 5.7, I noticed a high CPU utlization > 100%. My server uses multiple worker threads to run the ACE_Dev_Poll_Reactor. I got this behavior on CentOS 4.x and 5.x.
My app works fine if I revert back to v5.6.2 or if I run it with TP_Reactor.
Has anybody reported this issue yet?
Any ideas what may be causing it?
Thanks,
Sergio.

]]> Comment on Why Apache Qpid’s C++ Build is Switching to CMake by Reverse Merger http://stevehuston.wordpress.com/2009/05/14/why-apache-qpids-c-build-is-switching-to-cmake/#comment-39 Reverse Merger Tue, 09 Jun 2009 00:34:42 +0000 http://stevehuston.wordpress.com/?p=58#comment-39 I will be linking back I really like your site keep up the good work. I will be linking back I really like your site keep up the good work.

]]> Comment on Why Apache Qpid’s C++ Build is Switching to CMake by How We Converted the Apache Qpid C++ Build to CMake « Steve Huston's Networked Programming Blog http://stevehuston.wordpress.com/2009/05/14/why-apache-qpids-c-build-is-switching-to-cmake/#comment-38 How We Converted the Apache Qpid C++ Build to CMake « Steve Huston's Networked Programming Blog Mon, 01 Jun 2009 21:20:19 +0000 http://stevehuston.wordpress.com/?p=58#comment-38 [...] Steve Huston's Networked Programming Blog Making nets work « Why Apache Qpid’s C++ Build is Switching to CMake [...] [...] Steve Huston's Networked Programming Blog Making nets work « Why Apache Qpid’s C++ Build is Switching to CMake [...]

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