Re: runaway latency detection

From: Nikolay Borisov
Date: Sat Aug 20 2016 - 13:55:04 EST

Next message: Mikko Rapeli: "Re: [PATCH 1/2] Revert "include/uapi/drm/amdgpu_drm.h: use __u32 and __u64 from <linux/types.h>""
Previous message: SF Markus Elfring: "[PATCH] s390/tape: Use memdup_user() rather than duplicating its implementation"
In reply to: T. Smith: "runaway latency detection"
Next in thread: Steven Rostedt: "Re: runaway latency detection"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

On 20.08.2016 20:03, T. Smith wrote:
> The goal is to isolate causes of indeterminism when using the PREEMPT_RT kernel configuration with full preemption and to characterize latency and jitter using ftrace, any recommendations?

What hardware is it ? If it's x86 it's entirely possible you are seeing
SMI. Perhaps you should look into disabling those if you are on x86?

Next message: Mikko Rapeli: "Re: [PATCH 1/2] Revert "include/uapi/drm/amdgpu_drm.h: use __u32 and __u64 from <linux/types.h>""
Previous message: SF Markus Elfring: "[PATCH] s390/tape: Use memdup_user() rather than duplicating its implementation"
In reply to: T. Smith: "runaway latency detection"
Next in thread: Steven Rostedt: "Re: runaway latency detection"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]