| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Tue, 5 Jun 2012 11:29:47 -0400 From: Mathieu Desnoyers <mathieu.desnoyers@...icios.com> To: yoshihiro.yunomae.ez@...achi.com Cc: linux-kernel@...r.kernel.org, Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>, Steven Rostedt <rostedt@...dmis.org>, Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu> Subject: ivring driver Hi Yoshihiro, I stumbled on your post on ivring (https://lkml.org/lkml/2012/6/5/143) for buffering trace data from guest to host. I notice that it would be very interesting to see a comparison of its performance against: - ftrace ring buffer - perf ring buffer - lttng 2.0 ring buffer - lttng-ust 2.0 (user-space tracing) ring buffer Comparing only with network-related mechanisms does not seem to provide a complete picture of where it stands wrt other ring buffers out there. One of the metric we have used in the past is the number of nanoseconds it takes to write a single event, based on a test that writes lots of events into various buffer sizes, into flight recorder mode buffers (which overwrites oldest information on buffer full condition, with data collection to disk disabled, to remove I/O from the picture -- I/O can then be performed in "snapshot" mode, after some error condition is detected). Best regards, Mathieu -- Mathieu Desnoyers Operating System Efficiency R&D Consultant EfficiOS Inc. http://www.efficios.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists