Re: [Vserver] Sys V IPC tracking
On Tue, Dec 28, 2004 at 04:28:44PM -0500, Gregory (Grisha) Trubetskoy wrote: > > On Tue, 28 Dec 2004, Herbert Poetzl wrote: > > >On Mon, Dec 27, 2004 at 02:45:12PM -0500, Gregory (Grisha) Trubetskoy > >wrote: > >> > >> > >>Hi all, Merry XMas - > >> > >>Is there a simpler way to track IPC resources short of entering every > >>context and running ipcs? It seems that context 1 can only see its own > >>semaphores/locks/etc, wouldn't it make more sense if it saw all of them? > > > >I take this as a feature request ... will look into it soon. > > Just to clarify this a bit: > > I was originally looking at the /proc/sysvipc, which shows ipc stats for > the current context only. The ipcs command will show _all_ ipc resources > if run from context 0. So this is somewhat of a bug - the ipcs (or rather > the syscalls it uses) and /proc behave differently. > > To turn this into a feature request, I think it would be very neat if the > /proc/sysvipc/ directory for a context XYZ appeared as > /proc/virtual/XYZ/sysvipcs/. yes, but it's simpler (and neater) to use chcontext and a tool which get's the results via netlink (if possible) but the best solution is to monitor such stuff via a special syscall ... > The rational behind this is monitoring/tracking tools that constantly > check these values, sometimes under bad server conditions - it's a lot > more efficient to read /proc than to parse ipcs output. well, that might look like it is on first glance, but I can assure you that _any_ proc interface is basically a performance issue, and polling that every N seconds just makes it worse ... or with other words, don't do it, unless you want to burn CPU cycles and stall program execution ... > On the issue of consistency between /proc and ipcs - my inclanation is > that ipcs in ctx 0 should limit resources to context 0 just like /proc, > but should show everything in context 1. This would be consistent with ps, > and the utils could eventually have a vipcs command that works by > switching to ctx 1. ack, that looks like a sane assumption, and I'll look into that ... > Thanks! > > Grisha ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
Re: [Vserver] Sys V IPC tracking
On Tue, 28 Dec 2004, Herbert Poetzl wrote: On Mon, Dec 27, 2004 at 02:45:12PM -0500, Gregory (Grisha) Trubetskoy wrote: Hi all, Merry XMas - Is there a simpler way to track IPC resources short of entering every context and running ipcs? It seems that context 1 can only see its own semaphores/locks/etc, wouldn't it make more sense if it saw all of them? I take this as a feature request ... will look into it soon. Just to clarify this a bit: I was originally looking at the /proc/sysvipc, which shows ipc stats for the current context only. The ipcs command will show _all_ ipc resources if run from context 0. So this is somewhat of a bug - the ipcs (or rather the syscalls it uses) and /proc behave differently. To turn this into a feature request, I think it would be very neat if the /proc/sysvipc/ directory for a context XYZ appeared as /proc/virtual/XYZ/sysvipcs/. The rational behind this is monitoring/tracking tools that constantly check these values, sometimes under bad server conditions - it's a lot more efficient to read /proc than to parse ipcs output. On the issue of consistency between /proc and ipcs - my inclanation is that ipcs in ctx 0 should limit resources to context 0 just like /proc, but should show everything in context 1. This would be consistent with ps, and the utils could eventually have a vipcs command that works by switching to ctx 1. Thanks! Grisha ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
Re: [Vserver] Sys V IPC tracking
On Mon, Dec 27, 2004 at 02:45:12PM -0500, Gregory (Grisha) Trubetskoy wrote: > > > Hi all, Merry XMas - > > Is there a simpler way to track IPC resources short of entering every > context and running ipcs? It seems that context 1 can only see its own > semaphores/locks/etc, wouldn't it make more sense if it saw all of them? I take this as a feature request ... will look into it soon. thanks, Herbert > vs1.9.3 > > Thanks! > > Grisha > ___ > Vserver mailing list > Vserver@list.linux-vserver.org > http://list.linux-vserver.org/mailman/listinfo/vserver ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
[Vserver] Sys V IPC tracking
Hi all, Merry XMas - Is there a simpler way to track IPC resources short of entering every context and running ipcs? It seems that context 1 can only see its own semaphores/locks/etc, wouldn't it make more sense if it saw all of them? vs1.9.3 Thanks! Grisha ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
