From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e39.co.us.ibm.com (e39.co.us.ibm.com [32.97.110.160]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 6D51F1A0D59 for ; Mon, 22 Dec 2014 18:50:06 +1100 (AEDT) Received: from /spool/local by e39.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 22 Dec 2014 00:50:04 -0700 Received: from b01cxnp22035.gho.pok.ibm.com (b01cxnp22035.gho.pok.ibm.com [9.57.198.25]) by d01dlp02.pok.ibm.com (Postfix) with ESMTP id A3F7C6E8028 for ; Mon, 22 Dec 2014 02:41:54 -0500 (EST) Received: from d01av03.pok.ibm.com (d01av03.pok.ibm.com [9.56.224.217]) by b01cxnp22035.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id sBM7o0d926869820 for ; Mon, 22 Dec 2014 07:50:00 GMT Received: from d01av03.pok.ibm.com (localhost [127.0.0.1]) by d01av03.pok.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id sBM7nxlZ024159 for ; Mon, 22 Dec 2014 02:50:00 -0500 From: Sukadev Bhattiprolu To: Arnaldo Carvalho de Melo , Jiri Olsa , Michael Ellerman , Paul Mackerras Subject: [PATCH v6 3/4] perf Documentation: add event parameters Date: Sun, 21 Dec 2014 23:49:26 -0800 Message-Id: <1419234567-22784-4-git-send-email-sukadev@linux.vnet.ibm.com> In-Reply-To: <1419234567-22784-1-git-send-email-sukadev@linux.vnet.ibm.com> References: <1419234567-22784-1-git-send-email-sukadev@linux.vnet.ibm.com> Cc: peterz@infradead.org, linuxppc-dev@lists.ozlabs.org, dev@codyps.com, linux-kernel@vger.kernel.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Cody P Schafer Event parameters are a basic way for partial events to be specified in sysfs with per-event names given to the fields that need to be filled in when using a particular event. It is intended for supporting cases where the single 'cpu' parameter is insufficient. For example, POWER 8 has events for physical sockets/cores/cpus that are accessible from with virtual machines. To keep using the single 'cpu' parameter we'd need to perform a mapping between Linux's cpus and the physical machine's cpus (in this case Linux is running under a hypervisor). This isn't possible because bindings between our cpus and physical cpus may not be fixed, and we probably won't have a "cpu" on each physical cpu. Changelog[v6] Update event description to explain how required parameters are displayed. CC: Sukadev Bhattiprolu CC: Haren Myneni CC: Cody P Schafer Signed-off-by: Cody P Schafer --- Documentation/ABI/testing/sysfs-bus-event_source-devices-events | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events index 20979f8..47ad2a1 100644 --- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events @@ -52,12 +52,18 @@ Description: Per-pmu performance monitoring events specific to the running syste event=0x2abc event=0x423,inv,cmask=0x3 domain=0x1,offset=0x8,starting_index=0xffff + domain=0x1,offset=0x8,core=? Each of the assignments indicates a value to be assigned to a particular set of bits (as defined by the format file corresponding to the ) in the perf_event structure passed to the perf_open syscall. + In the case of the last example, a value replacing "?" would + need to be provided by the user selecting the particular event. + This is referred to as "event parameterization". All + non-numerical values indicate an event parameter. + What: /sys/bus/event_source/devices//events/.unit Date: 2014/02/24 Contact: Linux kernel mailing list -- 1.8.3.1