From: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
To: mpe@ellerman.id.au
Cc: kjain@linux.ibm.com, maddy@linux.vnet.ibm.com,
linuxppc-dev@lists.ozlabs.org, rnsastry@linux.ibm.com
Subject: [PATCH] powerpc/perf: Fix task context setting for trace imc
Date: Wed, 24 Nov 2021 08:16:00 +0530 [thread overview]
Message-ID: <20211124024600.18509-1-atrajeev@linux.vnet.ibm.com> (raw)
Trace IMC (In-Memory collection counters) in powerpc is
useful for application level profiling. For trace_imc,
presently task context (task_ctx_nr) is set to
perf_hw_context. But perf_hw_context is to be used for
cpu PMU. So for trace_imc, even though it is per thread
PMU, it is preferred to use sw_context inorder to be able
to do application level monitoring. Hence change the
task_ctx_nr to use perf_sw_context.
Fixes: 012ae244845f ("powerpc/perf: Trace imc PMU functions")
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Reviewed-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
---
arch/powerpc/perf/imc-pmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/perf/imc-pmu.c b/arch/powerpc/perf/imc-pmu.c
index e106909ff9c3..f3b3262bdf02 100644
--- a/arch/powerpc/perf/imc-pmu.c
+++ b/arch/powerpc/perf/imc-pmu.c
@@ -1457,7 +1457,7 @@ static int trace_imc_event_init(struct perf_event *event)
event->hw.idx = -1;
- event->pmu->task_ctx_nr = perf_hw_context;
+ event->pmu->task_ctx_nr = perf_sw_context;
event->destroy = reset_global_refc;
return 0;
}
--
2.33.0
next reply other threads:[~2021-11-24 2:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-24 2:46 Athira Rajeev [this message]
2022-01-19 10:56 ` [PATCH] powerpc/perf: Fix task context setting for trace imc Michael Ellerman
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