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Date: Thu, 25 Jun 2020 16:03:30 -0400 (EDT) From: Mathieu Desnoyers <mathieu.desnoyers@...icios.com> To: rostedt <rostedt@...dmis.org> Cc: linux-kernel <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Thomas Gleixner <tglx@...utronix.de>, Masami Hiramatsu <mhiramat@...nel.org>, Arnaldo Carvalho de Melo <acme@...hat.com>, Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>, Yordan Karadzhov <y.karadz@...il.com>, Tzvetomir Stoyanov <tz.stoyanov@...il.com>, Tom Zanussi <zanussi@...nel.org>, Jason Behmer <jbehmer@...gle.com>, Julia Lawall <julia.lawall@...ia.fr>, Clark Williams <williams@...hat.com>, bristot <bristot@...hat.com>, Daniel Wagner <wagi@...om.org>, Darren Hart <dvhart@...are.com>, Jonathan Corbet <corbet@....net>, "Suresh E. Warrier" <warrier@...ux.vnet.ibm.com> Subject: Re: [RFC][PATCH] ring-buffer: Have nested events still record running time stamp ----- On Jun 25, 2020, at 3:09 PM, rostedt rostedt@...dmis.org wrote: > On Thu, 25 Jun 2020 13:55:07 -0400 (EDT) > Mathieu Desnoyers <mathieu.desnoyers@...icios.com> wrote: > >> What are the types used for before_stamp and write_stamp ? If those >> are 64-bit integers, how does sharing them between nested contexts >> work on 32-bit architectures ? > > BTW, I forgot to state in either of my two emails, THANK YOU! > > I really appreciate the thorough review of this patch, and I welcome > the challenges you give me to make sure I can verify all that I claim > can happen. You're welcome! I believe these discussions we've been having for the past 10+ years on ring buffer design have helped improve our respective projects. I'm glad to be of service! Thanks, Mathieu -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com
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