From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linutronix.de (146.0.238.70:993) by crypto-ml.lab.linutronix.de with IMAP4-SSL for ; 08 Feb 2019 00:54:40 -0000 Received: from smtp.eu.citrix.com ([185.25.65.24]) by Galois.linutronix.de with esmtps (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1gruRC-0007SY-Um for speck@linutronix.de; Fri, 08 Feb 2019 01:54:39 +0100 Subject: [MODERATED] Re: [PATCH v3 5/6] PERFv3 References: <5cf21ef79d7930e410c9966293c3f4382c8dc8ad.1549582769.git.ak@linux.intel.com> From: Andrew Cooper Message-ID: Date: Fri, 8 Feb 2019 00:54:32 +0000 MIME-Version: 1.0 In-Reply-To: <5cf21ef79d7930e410c9966293c3f4382c8dc8ad.1549582769.git.ak@linux.intel.com> Content-Type: multipart/mixed; boundary="pGDexmZNf6DRXtYY3HVA1qZlkDNnbZMGx"; protected-headers="v1" To: speck@linutronix.de List-ID: --pGDexmZNf6DRXtYY3HVA1qZlkDNnbZMGx Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Content-Language: en-GB On 07/02/2019 23:41, speck for Andi Kleen wrote: > From: Andi Kleen > Subject: perf stat: Don't count EL for --transaction with three > counters > > When the system only has three counters HLE (EL) is also not > available. Detect that there are only three counters and > then automatically disable el-starts for --transaction. > This avoids event multiplexing in this situation with no loss > of information. What about the non-HT case, where 7 counters are available? ~Andrew --pGDexmZNf6DRXtYY3HVA1qZlkDNnbZMGx--