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On Wed, Aug 28, 2024 at 05:58:11PM +0100, Alan Maguire wrote: > On 17/08/2024 01:28, Kris Van Hees wrote: > > Problem found: the OL9 UEK7 kernel I am working with (and possibly all) does > > not allow an FBT probe on __perf_event_task_sched_in. The failure is silent, > > causing the probe to simply never get enabled and no error reported, so the > > probe does not fire and causes the test to fail. > > > > In other words... the approach in 1/2 of this series does *not* seem to work > > for OL7 kernels. That is a problem. > > > > Thanks for the report! I've root-caused the absence of the function from > available_filter_functions in UEK7 and earlier (upstream works fine). > Prior to > > commit 79df45731da68772d2285265864a52c900b8c65f > Author: Song Liu > Date: Wed Oct 6 14:07:32 2021 -0700 > > perf/core: Allow ftrace for functions in kernel/event/core.c > > It is useful to trace functions in kernel/event/core.c. Allow ftrace for > them by removing $(CC_FLAGS_FTRACE) from Makefile. > > Signed-off-by: Song Liu > Signed-off-by: Peter Zijlstra (Intel) > Link: > https://lkml.kernel.org/r/20211006210732.2826289-1-songliubraving@fb.com > > > ...kernel/events/Makefile removed the ftrace compile flags which mark > function entry for the code in kernel/events. In UEK7 we see > > ifdef CONFIG_FUNCTION_TRACER > CFLAGS_REMOVE_core.o = $(CC_FLAGS_FTRACE) > endif > > I'll try to find a workaround that doesn't rely on function boundary > tracing in these files to work.. > > Alan > > > On Fri, Aug 16, 2024 at 03:33:00PM -0400, Kris Van Hees wrote: > >> Running a full testsuite run (and then also individual test) I found this > >> test to fail on my OL9 VM with 5.15.0-205.149.5.1.el9uek.x86_64 kernel > >> while it works on my Debian VM with a 6.5.0 kernel. > >> > >> On Fri, Aug 02, 2024 at 05:37:11PM -0400, Kris Van Hees wrote: > >>> On Fri, Jun 28, 2024 at 06:16:34PM +0100, Alan Maguire wrote: > >>>> ...since tst.oncpu.d test passes now. > >>>> > >>>> Signed-off-by: Alan Maguire > >>> > >>> Reviewed-by: Kris Van Hees > >>> > >>>> --- > >>>> test/unittest/sched/tst.oncpu.d | 3 +-- > >>>> 1 file changed, 1 insertion(+), 2 deletions(-) > >>>> > >>>> diff --git a/test/unittest/sched/tst.oncpu.d b/test/unittest/sched/tst.oncpu.d > >>>> index d2c2ce57..7a33bab4 100644 > >>>> --- a/test/unittest/sched/tst.oncpu.d > >>>> +++ b/test/unittest/sched/tst.oncpu.d > >>>> @@ -1,11 +1,10 @@ > >>>> /* > >>>> * Oracle Linux DTrace. > >>>> - * Copyright (c) 2006, 2020, Oracle and/or its affiliates. All rights reserved. > >>>> + * Copyright (c) 2006, 2024, Oracle and/or its affiliates. All rights reserved. > >>>> * Licensed under the Universal Permissive License v 1.0 as shown at > >>>> * http://oss.oracle.com/licenses/upl. > >>>> */ > >>>> > >>>> -/* @@xfail: dtv2 */ > >>>> /* @@timeout: 15 */ > >>>> > >>>> #pragma D option switchrate=100hz > >>>> -- > >>>> 2.43.5 > >>>>