From patchwork Tue Sep 1 15:08:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 264621 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B6B99C433E6 for ; Tue, 1 Sep 2020 16:11:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8D1CD204EC for ; Tue, 1 Sep 2020 16:11:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598976715; bh=X1vd/hNDwaUxtFbZyy1MUDoC1bemL9dRQgvtcayG5Ho=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Y59jzv/BlpcDqDVH/iO9AXeTZPp9UpRPNS6EDp3qTGI8+hodxHa8Z3FGGORfF5djs gWvoUkVyaPT3+eeMjfyOcUrb9oh9l/A/1mubIVdSHivXbaaVotpC9WktEO4AnT0/A+ Vavs+6AJ77K46w1IR+GGPVUKwn6S6g0T3qL0A3gQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726946AbgIAQLw (ORCPT ); Tue, 1 Sep 2020 12:11:52 -0400 Received: from mail.kernel.org ([198.145.29.99]:44916 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731318AbgIAPhK (ORCPT ); Tue, 1 Sep 2020 11:37:10 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D0D3420866; Tue, 1 Sep 2020 15:37:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598974629; bh=X1vd/hNDwaUxtFbZyy1MUDoC1bemL9dRQgvtcayG5Ho=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hqUmhCBDl07fFlwviDSPkAEJyJAXeC9aI+Oi9qOMgMyQPSatO62PTJywx4RTmagwI nqBIngmlnrTJYXO2wmdEtrF6WU41MCCuDO17dF3JiRYwfizthQNufxn6Ygt2PqPNf+ ktr6kSEEMs7Y528P3WSgn26tslwUT01AngB8HQmQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Desnes A. Nunes do Rosario" , Sachin Sant , Michael Ellerman , Sasha Levin Subject: [PATCH 5.8 035/255] selftests/powerpc: Purge extra count_pmc() calls of ebb selftests Date: Tue, 1 Sep 2020 17:08:11 +0200 Message-Id: <20200901151002.455383100@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901151000.800754757@linuxfoundation.org> References: <20200901151000.800754757@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Desnes A. Nunes do Rosario [ Upstream commit 3337bf41e0dd70b4064cdf60acdfcdc2d050066c ] An extra count on ebb_state.stats.pmc_count[PMC_INDEX(pmc)] is being per- formed when count_pmc() is used to reset PMCs on a few selftests. This extra pmc_count can occasionally invalidate results, such as the ones from cycles_test shown hereafter. The ebb_check_count() failed with an above the upper limit error due to the extra value on ebb_state.stats.pmc_count. Furthermore, this extra count is also indicated by extra PMC1 trace_log on the output of the cycle test (as well as on pmc56_overflow_test): ========== ... [21]: counter = 8 [22]: register SPRN_MMCR0 = 0x0000000080000080 [23]: register SPRN_PMC1 = 0x0000000080000004 [24]: counter = 9 [25]: register SPRN_MMCR0 = 0x0000000080000080 [26]: register SPRN_PMC1 = 0x0000000080000004 [27]: counter = 10 [28]: register SPRN_MMCR0 = 0x0000000080000080 [29]: register SPRN_PMC1 = 0x0000000080000004 >> [30]: register SPRN_PMC1 = 0x000000004000051e PMC1 count (0x280000546) above upper limit 0x2800003e8 (+0x15e) [FAIL] Test FAILED on line 52 failure: cycles ========== Signed-off-by: Desnes A. Nunes do Rosario Tested-by: Sachin Sant Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200626164737.21943-1-desnesn@linux.ibm.com Signed-off-by: Sasha Levin --- .../selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c | 2 -- tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c | 2 -- .../selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c | 2 -- .../selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c | 2 -- tools/testing/selftests/powerpc/pmu/ebb/ebb.c | 2 -- .../selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c | 2 -- .../selftests/powerpc/pmu/ebb/lost_exception_test.c | 1 - .../testing/selftests/powerpc/pmu/ebb/multi_counter_test.c | 7 ------- .../selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c | 2 -- .../testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c | 2 -- .../selftests/powerpc/pmu/ebb/pmc56_overflow_test.c | 2 -- 11 files changed, 26 deletions(-) diff --git a/tools/testing/selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c b/tools/testing/selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c index a2d7b0e3dca97..a26ac122c759f 100644 --- a/tools/testing/selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c +++ b/tools/testing/selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c @@ -91,8 +91,6 @@ int back_to_back_ebbs(void) ebb_global_disable(); ebb_freeze_pmcs(); - count_pmc(1, sample_period); - dump_ebb_state(); event_close(&event); diff --git a/tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c b/tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c index bc893813483ee..bb9f587fa76e8 100644 --- a/tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c +++ b/tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c @@ -42,8 +42,6 @@ int cycles(void) ebb_global_disable(); ebb_freeze_pmcs(); - count_pmc(1, sample_period); - dump_ebb_state(); event_close(&event); diff --git a/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c b/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c index dcd351d203289..9ae795ce314e6 100644 --- a/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c +++ b/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c @@ -99,8 +99,6 @@ int cycles_with_freeze(void) ebb_global_disable(); ebb_freeze_pmcs(); - count_pmc(1, sample_period); - dump_ebb_state(); printf("EBBs while frozen %d\n", ebbs_while_frozen); diff --git a/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c b/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c index 94c99c12c0f23..4b45a2e70f62b 100644 --- a/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c +++ b/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c @@ -71,8 +71,6 @@ int cycles_with_mmcr2(void) ebb_global_disable(); ebb_freeze_pmcs(); - count_pmc(1, sample_period); - dump_ebb_state(); event_close(&event); diff --git a/tools/testing/selftests/powerpc/pmu/ebb/ebb.c b/tools/testing/selftests/powerpc/pmu/ebb/ebb.c index dfbc5c3ad52d7..21537d6eb6b7d 100644 --- a/tools/testing/selftests/powerpc/pmu/ebb/ebb.c +++ b/tools/testing/selftests/powerpc/pmu/ebb/ebb.c @@ -396,8 +396,6 @@ int ebb_child(union pipe read_pipe, union pipe write_pipe) ebb_global_disable(); ebb_freeze_pmcs(); - count_pmc(1, sample_period); - dump_ebb_state(); event_close(&event); diff --git a/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c b/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c index ca2f7d729155b..b208bf6ad58d3 100644 --- a/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c +++ b/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c @@ -38,8 +38,6 @@ static int victim_child(union pipe read_pipe, union pipe write_pipe) ebb_global_disable(); ebb_freeze_pmcs(); - count_pmc(1, sample_period); - dump_ebb_state(); FAIL_IF(ebb_state.stats.ebb_count == 0); diff --git a/tools/testing/selftests/powerpc/pmu/ebb/lost_exception_test.c b/tools/testing/selftests/powerpc/pmu/ebb/lost_exception_test.c index ac3e6e182614a..ba2681a12cc7b 100644 --- a/tools/testing/selftests/powerpc/pmu/ebb/lost_exception_test.c +++ b/tools/testing/selftests/powerpc/pmu/ebb/lost_exception_test.c @@ -75,7 +75,6 @@ static int test_body(void) ebb_freeze_pmcs(); ebb_global_disable(); - count_pmc(4, sample_period); mtspr(SPRN_PMC4, 0xdead); dump_summary_ebb_state(); diff --git a/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c b/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c index b8242e9d97d2d..791d37ba327b5 100644 --- a/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c +++ b/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c @@ -70,13 +70,6 @@ int multi_counter(void) ebb_global_disable(); ebb_freeze_pmcs(); - count_pmc(1, sample_period); - count_pmc(2, sample_period); - count_pmc(3, sample_period); - count_pmc(4, sample_period); - count_pmc(5, sample_period); - count_pmc(6, sample_period); - dump_ebb_state(); for (i = 0; i < 6; i++) diff --git a/tools/testing/selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c b/tools/testing/selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c index a05c0e18ded63..9b0f70d597020 100644 --- a/tools/testing/selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c +++ b/tools/testing/selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c @@ -61,8 +61,6 @@ static int cycles_child(void) ebb_global_disable(); ebb_freeze_pmcs(); - count_pmc(1, sample_period); - dump_summary_ebb_state(); event_close(&event); diff --git a/tools/testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c b/tools/testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c index 153ebc92234fd..2904c741e04e5 100644 --- a/tools/testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c +++ b/tools/testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c @@ -82,8 +82,6 @@ static int test_body(void) ebb_global_disable(); ebb_freeze_pmcs(); - count_pmc(1, sample_period); - dump_ebb_state(); if (mmcr0_mismatch) diff --git a/tools/testing/selftests/powerpc/pmu/ebb/pmc56_overflow_test.c b/tools/testing/selftests/powerpc/pmu/ebb/pmc56_overflow_test.c index eadad75ed7e6f..b29f8ba22d1e6 100644 --- a/tools/testing/selftests/powerpc/pmu/ebb/pmc56_overflow_test.c +++ b/tools/testing/selftests/powerpc/pmu/ebb/pmc56_overflow_test.c @@ -76,8 +76,6 @@ int pmc56_overflow(void) ebb_global_disable(); ebb_freeze_pmcs(); - count_pmc(2, sample_period); - dump_ebb_state(); printf("PMC5/6 overflow %d\n", pmc56_overflowed);