Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751930AbbKIPg1 (ORCPT ); Mon, 9 Nov 2015 10:36:27 -0500 Received: from mx1.redhat.com ([209.132.183.28]:53306 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751460AbbKIPgZ (ORCPT ); Mon, 9 Nov 2015 10:36:25 -0500 Date: Mon, 9 Nov 2015 16:36:20 +0100 From: Jiri Olsa To: Stephane Eranian , Andi Kleen Cc: lkml , Ingo Molnar , Paul Mackerras , Peter Zijlstra , Don Zickus , Joe Mario Subject: [RFC] perf x86 intel: Question about pebs_data_source data Message-ID: <20151109153620.GA11597@krava.xlan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2237 Lines: 57 hi, I was checking with SDM (September 2015) and I'd like if you guys could help me with understanding of following array elements I'm reffering to Table 18-19. Data Source Encoding for Load Latency Record - element 5 SDM says: 05H L3 HIT. Local or Remote home requests that hit the L3 cache and was serviced by another processor core with a cross core snoop where no modified copies were found. (clean). and we have L3 SNOOP MISS: OP_LH | P(LVL, L3) | P(SNOOP, MISS), /* 0x05: L3 hit, snoop miss */ while the SDM indicates HIT - element 6 SDM says: L3 HIT. Local or Remote home requests that hit the L3 cache and was serviced by another processor core with a cross core snoop where modified copies were found. (HITM). and we have L3 SNOOP HIT: OP_LH | P(LVL, L3) | P(SNOOP, HIT), /* 0x06: L3 hit, snoop hit */ while the SDM indicates HITM I'm probably misunderstanding SDM (wouldn't be the first time) what do I miss? thanks for comments, jirka --- diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c index 5db1c7755548..000ab82d09e7 100644 --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c @@ -57,8 +57,8 @@ static const u64 pebs_data_source[] = { OP_LH | P(LVL, LFB) | P(SNOOP, NONE), /* 0x02: LFB hit */ OP_LH | P(LVL, L2) | P(SNOOP, NONE), /* 0x03: L2 hit */ OP_LH | P(LVL, L3) | P(SNOOP, NONE), /* 0x04: L3 hit */ - OP_LH | P(LVL, L3) | P(SNOOP, MISS), /* 0x05: L3 hit, snoop miss */ - OP_LH | P(LVL, L3) | P(SNOOP, HIT), /* 0x06: L3 hit, snoop hit */ + OP_LH | P(LVL, L3) | P(SNOOP, HIT), /* 0x05: L3 hit, snoop hit */ + OP_LH | P(LVL, L3) | P(SNOOP, HITM), /* 0x06: L3 hit, snoop hitm */ OP_LH | P(LVL, L3) | P(SNOOP, HITM), /* 0x07: L3 hit, snoop hitm */ OP_LH | P(LVL, REM_CCE1) | P(SNOOP, HIT), /* 0x08: L3 miss snoop hit */ OP_LH | P(LVL, REM_CCE1) | P(SNOOP, HITM), /* 0x09: L3 miss snoop hitm*/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/