This is the mail archive of the systemtap@sourceware.org mailing list for the systemtap project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: Default number of active kretprobes

From: fche at redhat dot com (Frank Ch. Eigler)
To: Jim Keniston <jkenisto at us dot ibm dot com>
Cc: systemtap at sources dot redhat dot com
Date: 24 Mar 2006 23:24:43 -0500
Subject: Re: Default number of active kretprobes
References: <4422B9CF.30908@redhat.com> <1143159265.2781.18.camel@dyn9047018079.beaverton.ibm.com> <1143160975.2781.36.camel@dyn9047018079.beaverton.ibm.com> <1143249752.3447.24.camel@dyn9047018079.beaverton.ibm.com>

jkenisto wrote:

> [...]  Yet another possibility is per-module pools of spare
> kretprobe_instances.  E.g., for each script, SystemTap could
> generate code to call (say) pool =
> alloc_kretprobe_spares_pool(nspares) [...]

It would not be a problem to do this in the translator.  However, it's
also not a big deal to set maxactive to a "large" number like
NR_CPU*100 (each instance being <32 bytes, individually kmalloc'd).

- FChE

References:
- Default number of active kretprobes
  - From: William Cohen
- Re: Default number of active kretprobes
  - From: Jim Keniston
- Re: Default number of active kretprobes
  - From: Jim Keniston
- Re: Default number of active kretprobes
  - From: Jim Keniston

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]