On Thu, Jun 24, 2010 at 4:11 PM, Dennis Clarke <dcla...@blastwave.org>wrote:
> > > *Hi, > > > > I am working on Opensolaris build128 (64bit)on a Intel system > > with 6GB of memory. Out of that, I would like to use first 1GB > > for solaris. I have set physmem=0x40000 as the boot argument. > > Well two things come to mind. > > Firstly I was not aware you could set that value as a parameter via boot. > I think you need to put that into /etc/system and not as a param via some > grub boot line. Even then that DOES NOT WORK. See below. > It can be set as a prop=val option for the kernel image in the grub. > > Secondly it is pages of memory. I have never tried using physmem to > constrain memory pages because I generally just rip the memory out of the > machine and do it the old fashioned way. > > http://docs.sun.com/app/docs/doc/817-0404/chapter2-1?a=view > Thanks for the link. I have read the before. > > physmem > > Description > > Modifies the system's configuration of the number of physical pages of > memory after the Solaris OS and firmware are accounted for. > Data Type > > Unsigned long > Default > > Number of usable pages of physical memory available on the system, not > counting the memory where the core kernel and data are stored > Range > > 1 to amount of physical memory on system > Units > > Pages > Dynamic? > > No > Validation > > None > When to Change > > Whenever you want to test the effect of running the system with less > physical memory. Because this parameter does not take into account the > memory used by the core kernel and data, as well as various other data > structures allocated early in the startup process, the value of > physmem should be less than the actual number of pages that represent > the smaller amount of memory. > Commitment Level > > Unstable > > Some values I tend to look at or tweak from time to time for fun and profit > : > > r...@aequitas:/root# mdb -k > Loading modules: [ unix genunix specfs mac cpu.generic uppc pcplusmp > rootnex scsi_vhci ufs ip hook neti sockfs arp usba uhci stmf fctl nca lofs > zfs idm cpc random crypto nfs fcip ptm sppp ] > > physmem/D > physmem: > physmem: 243326 > > pagesize/D > mdb: failed to dereference symbol: unknown symbol name > > lotsfree/D > lotsfree: > lotsfree: 3801 > > desfree/D > desfree: > desfree: 1900 > > minfree/D > minfree: > minfree: 950 > > throttlefree/D > throttlefree: > throttlefree: 950 > > pageout_reserve/D > pageout_reserve: > pageout_reserve:475 > > tune_t_minarmem/D > tune_t_minarmem: > tune_t_minarmem:25 > > handspreadpages/D > handspreadpages: > handspreadpages:52819 > > swapfs_reserve/D > swapfs_reserve: > swapfs_reserve: 1900 > > moddebug/D > moddebug: > moddebug: 0 > > maxphys/D > maxphys: > maxphys: 57344 > > > > Since this is an x86 machine I have a pagesize of 4096 bytes. Let's verify > that : > > r...@aequitas:/root# prtconf -v | grep Memory > Memory size: 959 Megabytes > r...@aequitas:/root# > r...@aequitas:/root# bc > scale=6 > 4096 * 243326 > 996663296 > > Funny because the machine really has 1G of memory in it. > > > physmem/X > physmem: > physmem: 3b67e > > Oh well, your value of 0x40000 should work in /etc/system. Let me try with > 256MB of memory and see what I get. > > Here is my /etc/system just for laughs : ( note the broken weird first > line .. I didn't do that ) > > *ident "%Z%%M% %I% %E% SMI" /* SVR4 1.5 */ > * > * CDDL HEADER START > * > * The contents of this file are subject to the terms of the > * Common Development and Distribution License, Version 1.0 only > * (the "License"). You may not use this file except in compliance > * with the License. > * > * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE > * or http://www.opensolaris.org/os/licensing. > * See the License for the specific language governing permissions > * and limitations under the License. > * > * When distributing Covered Code, include this CDDL HEADER in each > * file and include the License file at usr/src/OPENSOLARIS.LICENSE. > * If applicable, add the following below this CDDL HEADER, with the > * fields enclosed by brackets "[]" replaced with your own identifying > * information: Portions Copyright [yyyy] [name of copyright owner] > * > * CDDL HEADER END > * > * > * SYSTEM SPECIFICATION FILE > * > ********************************************************************** > * > * Description : physmem > * > * Modifies the system's configuration of the number of > * physical pages of memory after the Solaris OS and > * firmware are accounted for. > * > * Data Type : Unsigned long > * > * Default : > * > * Number of usable pages of physical memory available on > * the system, not counting the memory where the core > * kernel and data are stored > * > * Range : 1 to amount of physical memory on system > * > * Units : Pages > * > * When to Change : > * > * Whenever you want to test the effect of running the > * system with less physical memory. Because this > * parameter does not take into account the memory used > * by the core kernel and data, as well as various other > * data structures allocated early in the startup process, > * the value of physmem should be less than the actual > * number of pages that represent the smaller amount of > * memory. > * > > set physmem=65536 > > *********************************************************************** > * > * Description : reserved_procs > * > * Specifies number of system process slots to be reserved > * in the process table for processes with a UID of root (0) > * > * Consider increasing to 10 + normal number of UID 0 (root) > * processes on system. This setting provides some cushion > * should it be necessary to obtain a root shell during a time > * when the system is otherwise unable to create user-level > * processes. > * > > set reserved_procs = 32 > > > ****************************************************************************** > * > * Description : pt_cnt > * > * The number of available /dev/pts entries is dynamic up to > * a limit determined by the amount of physical memory > * available on the system. > * > * pt_cnt is one of three variables that determines the > * minimum number of logins that the system can accommodate. > * The default maximum number of /dev/pts devices the system > * can support is determined at boot time by computing the > * number of pty structures that can fit in a percentage of > * system memory (see pt_pctofmem). If pt_cnt is zero, the > * system allocates up to that maximum. If pt_cnt is non-zero, > * the system allocates to the greater of pt_cnt and the > * default maximum. > * > * Data Type : Unsigned integer > * Default : 0 > * Range : 0 to maxpid > * Units : Logins/windows > * Dynamic? : No > * Validation: None > * > * When to Change > * > * When you want to explicitly control the number of users > * who can remotely log in to the system. > > * Note from Dennis Clarke : we may want to throttle this later > > * set pt_cnt = 32 > > > ****************************************************************************** > * > * Description : pt_pctofmem > * > * Specifies maximum percentage of physical memory that > * can be consumed by data structures to support /dev/pts > * entries. > * > * A system running a 64-bit kernel consumes 176 bytes > * per /dev/pts entry. A system running a 32-bit kernel > * consumes 112 bytes per /dev/pts entry. > * > * Default = 5 percent > * > > * Note from Dennis Clarke : It may be necessary to set this to a value > * higher than 5% on a really small machine. > * Great for embedded devices right. > * set pt_pctofmem = 10 > > > ****************************************************************************** > * > * Description : pt_max_pty > * > * Defines the maximum number of ptys the system offers. > * > * Data Type : Unsigned integer > * > * Default = 0 (Uses system-defined maximum) > * > * Range : 0 to MAXUINT > * > * Units is number of Logins/windows > * > * Dynamic? = Yes > * > * Validation : None > * > * Implicit > * > * Should be greater than or equal to pt_cnt. Value is not > * checked until the number of ptys allocated exceeds the > * value of pt_cnt. > * > * When to Change > * > * When you want to place an absolute ceiling on the number > * of logins supported, even if the system could handle more > * based on its current configuration values. > > * Note from Dennis Clarke : You may want to limit this someday. > * : But not today. > * set pt_max_pty = 64 > > > ****************************************************************************** > * > * Description : pidmax > * > * This parameter specifies value of largest possible process ID. > * pidmax sets the value for the maxpid variable. Once maxpid is > * set, pidmax is ignored. maxpid is used elsewhere in the kernel > * to determine the maximum process ID and for constraint > * checking. Attempts to set maxpid by adding an entry to the > * /etc/system file have no effect. > * > > * Note from Dennis Clarke : I have used this in the past when testing a new > * : kernel build on a really small machine. If this > * : value is set too low then you can have a wild > * : set of errors at boot time. Don't touch it ! > > * set pidmax = 32767 <-- not really recommended > > > ****************************************************************************** > * > * Description : max_nprocs > * > * Maximum number of processes that can be created on a system. > * Includes system and user processes. Any value entered in > * /etc/system is used in the computation of maxuprc. > * > * This value is also used in determining the size of several > * other system data structures. Other data structures where > * this variable plays a role are: > * > * - Determining the size of the directory name lookup > * cache (if ncsize is not specified). > * > * - Allocating disk quota structures for UFS > * (if ndquot is not specified). > * > * - Verifying that the amount of memory used by > * configured system V semaphores does not exceed > * system limits. > * > * - Configuring Hardware Address Translation resources > * for the sun4m and Intel platforms. > * > > set max_nprocs = 512 > > > ****************************************************************************** > * > * Description : maxuprc > * > * Maximum number of processes that can be created on a system > * by any one user. > * > * Data Type : Signed integer > * > * Default : max_nprocs - reserved_procs > * > * Range : 1 to max_nprocs - reserved_procs > * > * Validation : Compared to max_nprocs - reserved_procs and > * then set to the smaller of the two. > * > * When you want to specify a hard limit for the number of > * processes a user can create that is less than the default > * value of however many processes the system can create. > * Attempting to exceed this limit generates the following > * warning messages on the console or in the messages file: > * > * out of per-user processes for uid N > * > > set maxuprc = 64 > > > ****************************************************************************** > * > * Description : md_mirror:md_resync_bufsz > * > * To override the default buffer_size value used by the > * svc:/system/mdmonitor service, you can edit /etc/system > * to specify: > * > * set md_mirror:md_resync_bufsz = 2048 > * > * Such that resyncs occur as quickly as possible. > * > * See metasync(1M) > * > > set md_mirror:md_resync_bufsz = 2048 > > > ****************************************************************************** > * > * Requested by Oracle DBA for reasons unknown > * > * set shmsys:shminfo_shmmax = 4294967295 > * set shmsys:shminfo_shmseg = 1024 > * set shmsys:shminfo_shmmni = 1024 > * set semsys:seminfo_semaem = 16384 > * set semsys:seminfo_semmni = 1024 > * set semsys:seminfo_semmap = 1026 > * set semsys:seminfo_semmns = 16384 > * set semsys:seminfo_semmsl = 100 > * set semsys:seminfo_semopm = 100 > * set semsys:seminfo_semmnu = 2048 > * set semsys:seminfo_semume = 256 > * set msgsys:msginfo_msgmap = 1026 > * other bizarre black magic may be requested but simply is not > * needed on a modern Solaris or OpenSolaris server. I mean really. > > ****************************************************************************** > > system reboots now ... > > > Shutdown started. Thu Jun 24 23:05:58 GMT 2010 > > Changing to init state 6 - please wait > Broadcast Message from root (pts/1) on aequitas Thu Jun 24 23:05:59... > THE SYSTEM aequitas IS BEING SHUT DOWN NOW ! ! ! > Log off now or risk your files being damaged > > showmount: aequitas: RPC: Program not registered > updating //platform/i86pc/boot_archive > updating //platform/i86pc/amd64/boot_archive > . > . > . > r...@aequitas:/root# uptime > 23:11pm up 0:03, 1 user, load average: 1.74, 1.63, 0.73 > r...@aequitas:/root# mdb -k > Loading modules: [ unix genunix specfs dtrace mac cpu.generic uppc > pcplusmp rootnex scsi_vhci ufs ip hook neti sockfs arp usba uhci stmf fctl > nca lofs zfs md random idm cpc crypto nfs fcip ptm sppp ] > > physmem/D > physmem: > physmem: 243326 > > physmem/X > physmem: > physmem: 3b67e > > > r...@aequitas:/root# grep physmem /etc/system > * the value of physmem should be less than the actual > set physmem=65536 > > > Well lo and behold, the boot process seems to ignore the physmem > setting in /etc/system. > I assume the reason your physmem setting in /etc/system was not honored because of the following code in param_check(). #if defined(__x86) if (physmem != original_physmem) { cmn_err(CE_NOTE, "physmem cannot be modified to 0x%lx" " via /etc/system. Please use eeprom(1M) instead.", physmem); physmem = original_physmem; } #endif Really appreciate your comments. Thanks Anup > > -- > Dennis Clarke > dcla...@opensolaris.ca <- Email related to the open source Solaris > dcla...@blastwave.org <- Email related to open source for Solaris > > >
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