Date: Fri, 14 Jun 2002 00:08:09 -0700 From: Juli Mallett <jmallett@FreeBSD.org> To: Julian Elischer <julian@elischer.org> Cc: FreeBSD current users <current@freebsd.org> Subject: Re: KSE changes to ps Message-ID: <20020614000809.A12237@FreeBSD.ORG> In-Reply-To: <Pine.BSF.4.21.0206132354270.97512-100000@InterJet.elischer.org>; from julian@elischer.org on Thu, Jun 13, 2002 at 11:55:36PM -0700 References: <Pine.BSF.4.21.0206132354270.97512-100000@InterJet.elischer.org>
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* Julian Elischer <julian@elischer.org> escriurères > So the question is: what information can PS show > for a KSE threaded process? > > I have been thinking of: > > Certainly the first thing to decide it WHAT there is to show.. > threads that are in userspace are not visible to ps, or for that matter > the kernel, as teh Userland thread scheduler may switch between them > without notifying the kernel. Only threads blocked in the kernel can show > any information other than "running" For those in the userland there > is only the information in the associated kse , and priority > info from the thread is available. > > so for a process you can show: > process stuff (e.g. uid, pid, ppid) Hopefully this won't change. > kseg stuff (e.g. nice value, number runnable threads) Nice value and stuff are exported anyway via kproc_info. Maybe we should look at packing an export_thread in there for exported kse interfaces? > kse stuff(e.g. RUNNING @ priority 32 on cpu0) > kse stuff(e.g. RUNNING @ priority 31 on cpu1) > runnable threads > e.g. > thread runnable priority 33 > thread runnable priority 35 > thread runnable priority 37 > sleeping threads > e.g. > thread waiting at Mutex net1 prio 33 > thread sleeping at "biord" prio 31 This all has a simple solution. Export each thread as a process via kinfo_\ proc, and ps(1) will use the existing mtxname interfaces and such.. I don't know how simple this is at a code level. > kseg stuff (for next kseg) > ... > > > > anyone have thoughts? It'd be best to be able to poll the userland schedulers and the KSE stuff via the ptrace(2) interface, I think, or just export things using kinfo_proc and pad out the struct with things pertinent to KSE's. Thanks. -- Juli Mallett <jmallett@FreeBSD.org> FreeBSD: The Power To Serve Perception is prejudice / Don't classify me / Accept me as me / Not what you see To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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