From: Josh Stone <jistone@redhat.com>
To: Aubrey Li <aubreylee@gmail.com>, "Frank Ch. Eigler" <fche@redhat.com>
Cc: systemtap@sourceware.org
Subject: Re: kernel function probe overhead
Date: Tue, 29 Nov 2016 19:21:00 -0000 [thread overview]
Message-ID: <9f297ed9-e535-5f4d-e9ee-98507961f3f6@redhat.com> (raw)
In-Reply-To: <CAGPKeULiGUPMQ6e-YjSY3MTW+r=rjxYHYmoKEb1sU4DN+SL1Lg@mail.gmail.com>
On 11/28/2016 07:30 PM, Aubrey Li wrote:
>> Another solution would be to have per-thread global variables. Since
>> > the kernel doesn't help us out with this, we'd have to emulate it
>> > somehow, and for this to be wortwhile, it'd have to work faster than
>> > ordinary locked/shared array[tid()] accesses.
>> >
> Is this a suggestion for me? How to do this?
There are relevant RFEs for stap already:
per-cpu: https://sourceware.org/bugzilla/show_bug.cgi?id=10795
per-thread: https://sourceware.org/bugzilla/show_bug.cgi?id=10796
The latter was closed on the hunch that it wouldn't help much, but that
could still be explored if someone is interested.
next prev parent reply other threads:[~2016-11-29 19:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-25 16:07 Aubrey Li
2016-11-25 17:22 ` Frank Ch. Eigler
2016-11-26 6:18 ` Aubrey Li
2016-11-28 19:19 ` Frank Ch. Eigler
2016-11-29 3:31 ` Aubrey Li
2016-11-29 19:21 ` Josh Stone [this message]
2016-12-01 18:47 ` Cody Santing
[not found] ` <CAGPKeUKm9EZZxL=MHZX9_0N5SUYX291mJMTCExYSspRceJgrxg@mail.gmail.com>
2016-12-12 17:07 ` Fwd: " Cody Santing
2016-12-12 17:43 ` Frank Ch. Eigler
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