Date: Tue, 18 May 2010 00:40:54 -0700 From: Alfred Perlstein <alfred@freebsd.org> To: Dan McNulty <dkmcnulty@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Efficient way to determine when a child process forks or calls exec Message-ID: <20100518074054.GE6175@elvis.mu.org> In-Reply-To: <AANLkTinO0hqywG7sCWJYXTsayOtad2qnP1SPDn6NzCYm@mail.gmail.com> References: <AANLkTinO0hqywG7sCWJYXTsayOtad2qnP1SPDn6NzCYm@mail.gmail.com>
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* Dan McNulty <dkmcnulty@gmail.com> [100517 08:02] wrote: > Hi all, > > I have been experimenting with ptrace to determine when a child > process forks or calls exec. Particularly, I have explored tracing > every system call entry and exit similar to what the truss utility > does, and for my case, the performance impact of tracing every system > call is too great. > > Is there a more efficient way than tracing every system call entry and > exit to determine when a child process forks, calls exec, or creates a > new LWP? > > Thanks a lot for your help! kevent has some hooks, have you looked at that? -- - Alfred Perlstein .- AMA, VMOA #5191, 03 vmax, 92 gs500, 85 ch250, 07 zx10 .- FreeBSD committer
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