Loading...
Searching...
No Matches
XrdSsiScale.hh
Go to the documentation of this file.
#ifndef __XRDSSISCALE_HH__
#define __XRDSSISCALE_HH__
/******************************************************************************/
/* */
/* X r d S s i S c a l e . h h */
/* */
/* (c) 2013 by the Board of Trustees of the Leland Stanford, Jr., University */
/* Produced by Andrew Hanushevsky for Stanford University under contract */
/* DE-AC02-76-SFO0515 with the Department of Energy */
/* */
/* This file is part of the XRootD software suite. */
/* */
/* XRootD is free software: you can redistribute it and/or modify it under */
/* the terms of the GNU Lesser General Public License as published by the */
/* Free Software Foundation, either version 3 of the License, or (at your */
/* option) any later version. */
/* */
/* XRootD is distributed in the hope that it will be useful, but WITHOUT */
/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */
/* License for more details. */
/* */
/* You should have received a copy of the GNU Lesser General Public License */
/* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */
/* COPYING (GPL license). If not, see <http://www.gnu.org/licenses/>. */
/* */
/* The copyright holder's institutional names and contributor's names may not */
/* be used to endorse or promote products derived from this software without */
/* specific prior written permission of the institution or contributor. */
/******************************************************************************/
#include <cstdint>
#include <cstring>
#include "XrdSys/XrdSysPthread.hh"
class XrdSsiScale
{
public:
static const uint16_t defSprd = 4; // Initial spread
static const uint16_t maxSprd = 1024; // Maximum spread
static const uint16_t maxPend = 64000; // Maximum pending requests
static const uint16_t minTune = 3; // Minimum remaining channels to tune
static const uint16_t midTune = 64; // Quadratic tuning limit
static const uint16_t maxTune = 128; // Maximum linear increase
static const uint16_t zipTune = 512; // Channel count when maxTune applies
int getEnt();
void retEnt(int xEnt);
bool rsvEnt(int xEnt);
void setSpread(short sval);
XrdSsiScale() : Active(0), reActive(0), begEnt(0), nowEnt(0),
curSpread(defSprd), autoTune(false), needTune(false)
{memset(pendCnt, 0, sizeof(uint16_t)*maxSprd);}
~XrdSsiScale() {}
private:
void Retune();
bool Tune(char *buff, int blen);
XrdSysMutex entMutex;
uint32_t Active;
uint32_t reActive;
uint16_t begEnt;
uint16_t nowEnt;
uint16_t curSpread;
bool autoTune;
bool needTune;
uint16_t pendCnt[maxSprd];
};
#endif
XrdSysPthread.hh
XrdSsiScale::maxSprd
static const uint16_t maxSprd
Definition XrdSsiScale.hh:42
XrdSsiScale::defSprd
static const uint16_t defSprd
Definition XrdSsiScale.hh:41
XrdSsiScale::zipTune
static const uint16_t zipTune
Definition XrdSsiScale.hh:47
XrdSsiScale::setSpread
void setSpread(short sval)
Definition XrdSsiScale.cc:175
XrdSsiScale::XrdSsiScale
XrdSsiScale()
Definition XrdSsiScale.hh:57
XrdSsiScale::getEnt
int getEnt()
Definition XrdSsiScale.cc:50
XrdSsiScale::maxPend
static const uint16_t maxPend
Definition XrdSsiScale.hh:43
XrdSsiScale::midTune
static const uint16_t midTune
Definition XrdSsiScale.hh:45
XrdSsiScale::maxTune
static const uint16_t maxTune
Definition XrdSsiScale.hh:46
XrdSsiScale::~XrdSsiScale
~XrdSsiScale()
Definition XrdSsiScale.hh:61
XrdSsiScale::rsvEnt
bool rsvEnt(int xEnt)
Definition XrdSsiScale.cc:154
XrdSsiScale::minTune
static const uint16_t minTune
Definition XrdSsiScale.hh:44
XrdSsiScale::retEnt
void retEnt(int xEnt)
Definition XrdSsiScale.cc:95
XrdSysMutex
Definition XrdSysPthread.hh:165