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kaf24@firebug.cl.cam.ac.uk
e4287d87ae
The primary purpose of this patch is to add support for non-polling
access to the xen trace buffers. The hypervisor changes have already
been accepted.
Also included are a few bug fixes and some minor new features:
1. If xenmon is run without first allocating trace buffers (via
'setsize') and enabling them (via 'tbctl'), then this is done
automatically using sensible defaults.
2. There was a bug that caused the first second's worth of data output
from xenmon to be erroneous; This has been fixed.
3. There was a bug that caused xenmon to sometimes not display data for
newly created domains; This has also been fixed.
4. The xenmon display has a 'heartbeat' which flickers once per second.
This is to show that xenmon is still alive, even though the display
isn't changing at all, a situation that can happen sometimes when there
is nothing at all happening on a particular cpu.
5. Added cpu utilization display to the top of the xenmon window.
6. Added a bunch of options in xenmon to control exactly which metrics
are displayed, so the screen doesn't get cluttered with stuff you're not
interested in. The new options are:
--allocated
--noallocated
--blocked
--noblocked
--waited
--nowaited
--excount
--noexcount
--iocount
--noiocount
7. Added an option ("--cpu=N") to xenmon to specify which physical cpu
you'd like data displayed for.
8. Updated the README with information about default trace buffer size, etc.
Signed-off-by: Rob Gardner <rob.gardner@hp.com>
105 lines
3.4 KiB
C
105 lines
3.4 KiB
C
/******************************************************************************
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* TOOLS/xenbaked.h
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*
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* Header file for xenbaked
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*
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* Copyright (C) 2005 by Hewlett Packard, Palo Alto and Fort Collins
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*
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* Authors: Diwaker Gupta, diwaker.gupta@hp.com
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* Rob Gardner, rob.gardner@hp.com
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* Lucy Cherkasova, lucy.cherkasova.hp.com
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; under version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __QOS_H__
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#define __QOS_H__
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///// qos stuff
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#define million 1000000LL
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#define billion 1000000000LL
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// caution: don't use QOS_ADD with negative numbers!
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#define QOS_ADD(N,A) ((N+A)<(NSAMPLES-1) ? (N+A) : A)
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#define QOS_INCR(N) ((N<(NSAMPLES-2)) ? (N+1) : 0)
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#define QOS_DECR(N) ((N==0) ? (NSAMPLES-1) : (N-1))
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#define MAX_NAME_SIZE 32
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#define IDLE_DOMAIN_ID 32767
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/* Number of domains we can keep track of in memory */
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#define NDOMAINS 32
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/* Number of data points to keep */
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#define NSAMPLES 100
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#define ID(X) ((X>NDOMAINS-1)?(NDOMAINS-1):X)
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#define DEFAULT_TBUF_SIZE 20
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// per domain stuff
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typedef struct
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{
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uint64_t last_update_time;
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uint64_t start_time; // when the thread started running
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uint64_t runnable_start_time; // when the thread became runnable
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uint64_t blocked_start_time; // when the thread became blocked
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uint64_t ns_since_boot; // time gone by since boot
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uint64_t ns_oncpu_since_boot; // total cpu time used by thread since boot
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// uint64_t ns_runnable_since_boot;
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int runnable_at_last_update; // true if the thread was runnable last time we checked.
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int runnable; // true if thread is runnable right now
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// tells us something about what happened during the
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// sample period that we are analysing right now
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int in_use; //
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domid_t id;
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char name[MAX_NAME_SIZE];
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} _domain_info;
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typedef struct
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{
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struct
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{
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// data point:
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// stuff that is recorded once for each measurement interval
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uint64_t ns_gotten[NDOMAINS]; // ns used in the last sample period
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uint64_t ns_allocated[NDOMAINS]; // ns allocated by scheduler
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uint64_t ns_waiting[NDOMAINS]; // ns spent waiting to execute, ie, time from
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// becoming runnable until actually running
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uint64_t ns_blocked[NDOMAINS]; // ns spent blocked
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uint64_t switchin_count[NDOMAINS]; // number of executions of the domain
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uint64_t io_count[NDOMAINS];
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uint64_t ns_passed; // ns gone by on the wall clock, ie, the sample period
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uint64_t timestamp;
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uint64_t lost_records; // # of lost trace records this time period
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uint64_t flip_free_periods; // # of executions of dom0 in which no page flips happened
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} qdata[NSAMPLES];
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_domain_info domain_info[NDOMAINS];
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// control information
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int next_datapoint;
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int ncpu;
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int structlen;
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// parameters
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int measurement_frequency; // for example
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} _new_qos_data;
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#endif
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