{"id":2196360,"url":"http://patchwork.ozlabs.org/api/1.0/patches/2196360/?format=json","project":{"id":17,"url":"http://patchwork.ozlabs.org/api/1.0/projects/17/?format=json","name":"GNU Compiler Collection","link_name":"gcc","list_id":"gcc-patches.gcc.gnu.org","list_email":"gcc-patches@gcc.gnu.org","web_url":null,"scm_url":null,"webscm_url":null},"msgid":"<20260213150535.90350-3-dhruvc@nvidia.com>","date":"2026-02-13T15:05:35","name":"[2/2] gcc-auto-profile: Force writing perf output to perf.data [PR124075]","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"3df61471c68d2ec9ea76a8a94d2ba745283e1d73","submitter":{"id":89212,"url":"http://patchwork.ozlabs.org/api/1.0/people/89212/?format=json","name":"Dhruv Chawla","email":"dhruvc@nvidia.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/gcc/patch/20260213150535.90350-3-dhruvc@nvidia.com/mbox/","series":[{"id":492111,"url":"http://patchwork.ozlabs.org/api/1.0/series/492111/?format=json","date":"2026-02-13T15:05:33","name":"gcc-auto-profile: Fixes for PR123923 and PR124075","version":1,"mbox":"http://patchwork.ozlabs.org/series/492111/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2196360/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","gcc-patches@gcc.gnu.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","gcc-patches@gcc.gnu.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256\n header.s=selector2 header.b=VMQhRpTg;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=38.145.34.32; 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Ip=[216.228.117.160];\n Helo=[mail.nvidia.com]","X-MS-Exchange-CrossTenant-AuthSource":"\n MWH0EPF000C6194.namprd02.prod.outlook.com","X-MS-Exchange-CrossTenant-AuthAs":"Anonymous","X-MS-Exchange-CrossTenant-FromEntityHeader":"HybridOnPrem","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"LV3PR12MB9118","X-BeenThere":"gcc-patches@gcc.gnu.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Gcc-patches mailing list ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"},"content":"From: Dhruv Chawla \n\nThis is a partial fix for PR124075 which forces perf record to write the\nprofile out to perf.data. This is required because I noticed on both\naarch64 and x86 that it was writing out the profile to stdout at times,\nwhich would cause profile information to be dropped. This did not fail\nin the various create_fdas_for_* targets because they would only try and\naccess the perf profiles if they existed at their paths.\n\nFurther work for this patch is to plumb the PERF_DATA make variable into\nthe perf record invocation, but that is a stage 1 thing.\n\nAutoprofilebootstrapped and regtested on aarch64-linux-gnu.\n\nSigned-off-by: Dhruv Chawla \n\ngcc/ChangeLog:\n\tPR gcov-profile/124075\n\t* config/aarch64/gcc-auto-profile: Add \"-o perf.data\" to perf\n\trecord invocation.\n\t* config/i386/gcc-auto-profile: Likewise.\n---\n gcc/config/aarch64/gcc-auto-profile | 4 ++--\n gcc/config/i386/gcc-auto-profile | 4 ++--\n 2 files changed, 4 insertions(+), 4 deletions(-)","diff":"diff --git a/gcc/config/aarch64/gcc-auto-profile b/gcc/config/aarch64/gcc-auto-profile\nindex fdf06dfeed0..b235e966048 100755\n--- a/gcc/config/aarch64/gcc-auto-profile\n+++ b/gcc/config/aarch64/gcc-auto-profile\n@@ -43,11 +43,11 @@ if [ \"$use_brbe\" = true ] ; then\n echo >&2 \"Warning: branch profiling may not be functional in VMs\"\n fi\n set -x\n- perf record --inherit -j any,$FLAGS \"$@\"\n+ perf record --inherit -o perf.data -j any,$FLAGS \"$@\"\n set +x\n else\n echo >&2 \"Warning: branch profiling may not be functional without BRBE\"\n set -x\n- perf record --inherit \"$@\"\n+ perf record --inherit -o perf.data \"$@\"\n set +x\n fi\ndiff --git a/gcc/config/i386/gcc-auto-profile b/gcc/config/i386/gcc-auto-profile\nindex 5cd4077826b..c7772a2800f 100755\n--- a/gcc/config/i386/gcc-auto-profile\n+++ b/gcc/config/i386/gcc-auto-profile\n@@ -117,13 +117,13 @@ echo >&2 \"AMD CPU without support for ex_ret_brn_tkn event\"\n fi ;;\n esac\n set -x\n-if ! perf record --inherit -e $E -b \"$@\" ; then\n+if ! perf record --inherit -o perf.data -e $E -b \"$@\" ; then\n # PEBS may not actually be working even if the processor supports it\n # (e.g., in a virtual machine). Trying to run without /p.\n set +x\n echo >&2 \"Retrying without /p.\"\n E=\"$(echo \"${E}\" | sed -e \\'s/\\/p/\\//\\ -e s/:p//)\"\n set -x\n- exec perf record --inherit -e $E -b \"$@\"\n+ exec perf record --inherit -o perf.data -e $E -b \"$@\"\n set +x\n fi\n","prefixes":["2/2"]}