lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Sat, 14 Sep 2013 00:00:59 -0700 From: tip-bot for Stephane Eranian <tipbot@...or.com> To: linux-tip-commits@...r.kernel.org Cc: linux-kernel@...r.kernel.org, eranian@...gle.com, hpa@...or.com, mingo@...nel.org, tglx@...utronix.de Subject: [tip:x86/urgent] perf/x86/intel: Mark MEM_LOAD_UOPS_MISS_RETIRED as precise on SNB Commit-ID: 9d8e3f9693245415db0b7c58551a91fa9fd1f9c7 Gitweb: http://git.kernel.org/tip/9d8e3f9693245415db0b7c58551a91fa9fd1f9c7 Author: Stephane Eranian <eranian@...gle.com> AuthorDate: Fri, 13 Sep 2013 13:16:46 -0700 Committer: Ingo Molnar <mingo@...nel.org> CommitDate: Sat, 14 Sep 2013 08:00:18 +0200 perf/x86/intel: Mark MEM_LOAD_UOPS_MISS_RETIRED as precise on SNB On Intel SNB (SNB, SNB-EP), the event MEM_LOAD_UOPS_MISS_RETIRED supports PEBS. It was missing for the SNB PEBS event constraint table thereby preventing any measurement with PEBS for it. This patch adds the event to the PEBS table for SNB. WARNING: it should be noted that this event like a few others are subject to the erratum BT241 for Xeon E5 (SNB-EP). As such, the event may undercount when used with PEBS unless the workaround is implemented. But without this patch and just the workaround, the kernel would not allow precise sampling on this event. BT241 is documented in: http://www.intel.com/content/dam/www/public/us/en/documents/specification-updates/xeon-e5-family-spec-update.pdf Signed-off-by: Stephane Eranian <eranian@...gle.com> Cc: peterz@...radead.org Cc: ak@...ux.intel.com Cc: zheng.z.yan@...el.com Link: http://lkml.kernel.org/r/20130913201646.GA23981@google.com Signed-off-by: Ingo Molnar <mingo@...nel.org> --- arch/x86/kernel/cpu/perf_event_intel_ds.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c index 3065c57..4ab70ac 100644 --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c @@ -558,6 +558,7 @@ struct event_constraint intel_snb_pebs_event_constraints[] = { INTEL_EVENT_CONSTRAINT(0xd0, 0xf), /* MEM_UOP_RETIRED.* */ INTEL_EVENT_CONSTRAINT(0xd1, 0xf), /* MEM_LOAD_UOPS_RETIRED.* */ INTEL_EVENT_CONSTRAINT(0xd2, 0xf), /* MEM_LOAD_UOPS_LLC_HIT_RETIRED.* */ + INTEL_EVENT_CONSTRAINT(0xd3, 0xf), /* MEM_LOAD_UOPS_LLC_MISS_RETIRED.* */ INTEL_UEVENT_CONSTRAINT(0x02d4, 0xf), /* MEM_LOAD_UOPS_MISC_RETIRED.LLC_MISS */ EVENT_CONSTRAINT_END }; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists