From: Ian Rogers <irogers@google.com>
To: tmricht@linux.ibm.com
Cc: acme@kernel.org, agordeev@linux.ibm.com, gor@linux.ibm.com,
hca@linux.ibm.com, irogers@google.com, japo@linux.ibm.com,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
linux-s390@vger.kernel.org, namhyung@kernel.org,
sumanthk@linux.ibm.com
Subject: [PATCH v1 0/2] perf evsel fallback changes
Date: Wed, 11 Mar 2026 20:19:26 -0700 [thread overview]
Message-ID: <20260312031928.1494864-1-irogers@google.com> (raw)
In-Reply-To: <131d7e1e-701e-4f5b-961f-c85af74f1d96@linux.ibm.com>
Discussion with Thomas Richter in:
https://lore.kernel.org/lkml/20260306071002.2526085-1-tmricht@linux.ibm.com/
showed that the evsel__fallback wasn't working for s390. These patches
avoid the problematic frame pointer callchain on s390 and fix
evsel__fallback from a range of problems when falling back to a
software event. I simulated failures when developing the patches but
they are untested other than that.
Ian Rogers (2):
perf evsel: Improve falling back from cycles
perf evsel: Don't configure framepointer callchains on s390
tools/perf/util/evsel.c | 49 +++++++++++++++++++++++++++++------------
tools/perf/util/evsel.h | 2 ++
2 files changed, 37 insertions(+), 14 deletions(-)
--
2.53.0.851.ga537e3e6e9-goog
next prev parent reply other threads:[~2026-03-12 3:19 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-06 7:10 [PATCH] perf test: Fix test case 120 and 121 for s390 Thomas Richter
2026-03-06 15:51 ` Jan Polensky
2026-03-06 16:53 ` Ian Rogers
2026-03-09 12:59 ` Thomas Richter
2026-03-09 18:18 ` Ian Rogers
2026-03-11 6:09 ` Namhyung Kim
2026-03-11 7:21 ` Thomas Richter
2026-03-12 3:19 ` Ian Rogers [this message]
2026-03-12 3:19 ` [PATCH v1 1/2] perf evsel: Improve falling back from cycles Ian Rogers
2026-03-12 3:19 ` [PATCH v1 2/2] perf evsel: Don't configure framepointer callchains on s390 Ian Rogers
2026-03-12 6:16 ` [PATCH v2 0/2] perf evsel fallback changes Ian Rogers
2026-03-12 6:16 ` [PATCH v2 1/2] perf evsel: Improve falling back from cycles Ian Rogers
2026-03-12 6:16 ` [PATCH v2 2/2] perf evsel: Don't configure framepointer callchains on s390 Ian Rogers
2026-03-12 12:45 ` Thomas Richter
2026-03-12 15:54 ` Ian Rogers
2026-03-12 16:46 ` Ian Rogers
2026-03-12 18:00 ` Namhyung Kim
2026-03-13 9:46 ` Thomas Richter
2026-03-13 21:01 ` Namhyung Kim
2026-03-13 20:28 ` [PATCH v3 0/3] perf evsel fallback changes Ian Rogers
2026-03-13 20:28 ` [PATCH v3 1/3] perf evsel: Improve falling back from cycles Ian Rogers
2026-03-13 20:28 ` [PATCH v3 2/3] perf target: Constify simple check functions Ian Rogers
2026-03-13 20:28 ` [PATCH v3 3/3] perf evlist: Improve default event for s390 Ian Rogers
2026-03-16 12:13 ` Thomas Richter
2026-03-16 18:41 ` Ian Rogers
2026-03-17 3:05 ` [PATCH v4 0/5] perf evsel fallback changes Ian Rogers
2026-03-17 3:05 ` [PATCH v4 1/5] perf evsel: Improve falling back from cycles Ian Rogers
2026-03-17 3:05 ` [PATCH v4 2/5] perf target: Constify simple check functions Ian Rogers
2026-03-17 3:05 ` [PATCH v4 3/5] perf evsel: Constify option arguments to config functions Ian Rogers
2026-03-17 3:06 ` [PATCH v4 4/5] perf callchain: Move callchain option parsing out of builtin Ian Rogers
2026-03-17 3:06 ` [PATCH v4 5/5] perf evlist: Improve default event for s390 Ian Rogers
2026-03-17 5:53 ` [PATCH v5 0/5] perf evsel fallback changes Ian Rogers
2026-03-17 5:53 ` [PATCH v5 1/5] perf evsel: Improve falling back from cycles Ian Rogers
2026-03-17 5:53 ` [PATCH v5 2/5] perf target: Constify simple check functions Ian Rogers
2026-03-17 5:53 ` [PATCH v5 3/5] perf evsel: Constify option arguments to config functions Ian Rogers
2026-03-17 5:53 ` [PATCH v5 4/5] perf callchain: Refactor callchain option parsing Ian Rogers
2026-03-17 5:53 ` [PATCH v5 5/5] perf evlist: Improve default event for s390 Ian Rogers
2026-03-17 7:52 ` Thomas Richter
2026-03-17 15:54 ` Ian Rogers
2026-03-17 17:56 ` [PATCH v6 0/5] perf evsel fallback changes, better s390 defaults Ian Rogers
2026-03-17 17:56 ` [PATCH v6 1/5] perf evsel: Improve falling back from cycles Ian Rogers
2026-03-17 17:56 ` [PATCH v6 2/5] perf target: Constify simple check functions Ian Rogers
2026-03-17 17:56 ` [PATCH v6 3/5] perf evsel: Constify option arguments to config functions Ian Rogers
2026-03-17 17:56 ` [PATCH v6 4/5] perf callchain: Refactor callchain option parsing Ian Rogers
2026-03-17 17:56 ` [PATCH v6 5/5] perf evlist: Improve default event for s390 Ian Rogers
2026-03-18 8:20 ` [PATCH v6 0/5] perf evsel fallback changes, better s390 defaults Thomas Richter
2026-03-18 16:29 ` Ian Rogers
2026-03-18 17:58 ` [PATCH v7 " Ian Rogers
2026-03-18 17:58 ` [PATCH v7 1/5] perf evsel: Improve falling back from cycles Ian Rogers
2026-03-18 17:58 ` [PATCH v7 2/5] perf target: Constify simple check functions Ian Rogers
2026-03-18 17:58 ` [PATCH v7 3/5] perf evsel: Constify option arguments to config functions Ian Rogers
2026-03-18 17:58 ` [PATCH v7 4/5] perf callchain: Refactor callchain option parsing Ian Rogers
2026-03-18 17:58 ` [PATCH v7 5/5] perf evlist: Improve default event for s390 Ian Rogers
2026-03-18 23:45 ` [PATCH v8 0/5] perf evsel fallback changes, better s390 defaults Ian Rogers
2026-03-18 23:45 ` [PATCH v8 1/5] perf evsel: Improve falling back from cycles Ian Rogers
2026-03-18 23:45 ` [PATCH v8 2/5] perf target: Constify simple check functions Ian Rogers
2026-03-18 23:45 ` [PATCH v8 3/5] perf evsel: Constify option arguments to config functions Ian Rogers
2026-03-18 23:45 ` [PATCH v8 4/5] perf callchain: Refactor callchain option parsing Ian Rogers
2026-03-18 23:46 ` [PATCH v8 5/5] perf evlist: Improve default event for s390 Ian Rogers
2026-03-19 7:53 ` Thomas Richter
2026-03-19 5:39 ` [PATCH v8 0/5] perf evsel fallback changes, better s390 defaults Ian Rogers
2026-03-19 8:02 ` Thomas Richter
2026-03-20 18:12 ` Namhyung Kim
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