Date: Sat, 1 Apr 2006 16:34:25 +0200 From: Mathieu Prevot <freebsd-stable@club-internet.fr> To: stable@freebsd.org Cc: amd64@freebsd.org Subject: 6.1 responsiveness under heavy (cpu?) load + thread monitoring Message-ID: <20060401143425.GA1305@scienceclue.ath.cx>
next in thread | raw e-mail | index | archive | help
Hello, I have a RELENG_6/AMD64 with an AMD64X2 cpu, 1GB of memory, 512MB swap. I remarked that when I run 2 simulation program [1], sometimes, one of them run one or several of its threads [2] very slowly, but sometimes, it doesn't occur. I remarked that is doesn't depend on SMP/UP, ULE/4BSD, i386/AMD64. It seems to occur also with the kernel stress test under the same conditions (all of them). In this case, the mouse is blocked, etc. I tested different kernels, and recorded the output of sysctl vm [3]. I increased vm.swap_async_max but this doesn't change the deal /a priori/. All that didn't occur with a Sempron64. All was slower but the mouse didn't blocked etc. This was a time ago, I may be wrong. It seems to be an architecture problem (??). I can give more quantitative data, but I need help to focus the tests... Mathieu [1] http://ising.podzone.org/src/ising_lps_0.4.tar.bz2 [2] void *interface(void *arg) can be very slow, void *system_trace(void *arg) can exit during a very long time (terminated ? detached: it should). [3] http://ising.podzone.org/vm/vm_amd64.tar.bz2 and others in this directory PS: does FreeBSD allow monitoring threads of a program in real time ? I didn't find anything for freebsd.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20060401143425.GA1305>