04-20-2007
how allocate virtual memory
Hi Folks
can any body suggest how to allocate virtual memory any function for that
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi Guys
I using Solaris 8 and I need to change the size of my /tmp file. Was wondering does anyone know how to do this.
Thanks
Carson (1 Reply)
Discussion started by: cmackin
1 Replies
2. UNIX for Advanced & Expert Users
On SunOS 5.8 I get an error when starting a large Java process with over 2Gb memory.
Error occurred during initialization of VM
Could not reserve enough space for object heap
When stopping several other Java processes we can start this process. This seems to indicate that we don't have... (11 Replies)
Discussion started by: rein
11 Replies
3. UNIX for Advanced & Expert Users
Hi,
I have 2 systems with same hardware and software. One system is giving me error "Error occurred during initialization of VM Could not reserve enough space for object " when I tried to increase JBoss App's heap size to 2GB while the other system is running fine without any issue. Is there... (5 Replies)
Discussion started by: ravi3553
5 Replies
4. UNIX for Advanced & Expert Users
hi... i want to find oracle allocate how many memory really..
i execute this code to list memory on unix system : ps -eo pmem,args | sort -k 1 -r -n
outputs ;
%mem command
12.9|ora_smon_RTX
12.9|ora_s000_RTX
12.9|ora_reco_RTX
12.9|ora_qmnc_RTX... (2 Replies)
Discussion started by: utoptas
2 Replies
5. SuSE
Hi,
In my proj, one process was running for 2 days. after 2 days its throwing an error message "shmget failed cannot allocate memory". the same problem happened every time.i.e. i can reproduce the same issue if my process is running for every 2 days for a same operation.Within this 2 days there... (1 Reply)
Discussion started by: ManoharanMani
1 Replies
6. Linux
Hi,
In my proj, one process was running for 2 days. after 2 days its throwing an error message "shmget failed cannot allocate memory". the same problem happened every time.i.e. i can reproduce the same issue if my process is running for every 2 days for a same operation.Within this 2 days there... (1 Reply)
Discussion started by: ManoharanMani
1 Replies
7. Linux
Hi,
In my proj, one process was running for 2 days. after 2 days its throwing an error message "shmget failed cannot allocate memory". the same problem happened every time.i.e. i can reproduce the same issue if my process is running for every 2 days for a same operation.Within this 2 days there... (1 Reply)
Discussion started by: ManoharanMani
1 Replies
8. Programming
hi
I want to take string as a input from user and the string is very very length. From the lengthy string i have to substring take first 16 letters, then next 8 letters,................... Please guide me how to write program to take lengthy string from user and sub string it.
Thanks (4 Replies)
Discussion started by: atharalikhan
4 Replies
9. Solaris
On SunOS 10 get an error when starting a large Java process with over 2Gb memory.
Error occurred during initialization of VM
Could not reserve enough space for object heap
i have 32G memory !! , swap = 31G
Please any advice !!! (3 Replies)
Discussion started by: moata_u
3 Replies
10. Programming
Hi , experts.
I work on Linux station (RedHat 5.7), regular user, but have root password.
%> uname -a
Linux ran1log06 2.6.18-238.1.1.el5 #1 SMP Tue Jan 4 13:32:19 EST 2011 x86_64 x86_64 x86_64 GNU/Linux
%> cat /etc/issue
Red Hat Enterprise Linux Client release 5.7 (Tikanga)
Kernel \r on... (5 Replies)
Discussion started by: baruchgu
5 Replies
LEARN ABOUT OSF1
svatophys
svatophys(9r) svatophys(9r)
NAME
svatophys - General: Converts a system virtual address to a physical address
SYNOPSIS
kern_return_t svatophys(
vm_offset_t kern_addr,
vm_offset_t *phys_addr );
ARGUMENTS
Specifies the kernel virtual address. Specifies a pointer to the physical address to be filled in.
DESCRIPTION
The svatophys routine converts a system virtual address to the corresponding physical address. All address and data structure manipulation
done within the kernel is performed using system virtual addresses. Typically, system virtual addresses are a means of mapping physical
memory and I/O space, which often consists of device registers and DMA buffers. In contrast to this, devices are usually unaware of any
virtual addressing and for this reason use physical addresses. You use the svatophys routine to perform this address translation.
As an example of where you can use this address translation, a disk device driver can use DMA buffers to transfer blocks of data to the
disk (for the case of a write operation). The data to be written to disk is present in system memory at a system virtual address known to
the driver. To initiate the DMA operation, the disk driver can set up a command packet to specify a write operation to the underlying disk
controller hardware. This write command packet contains (among other things) the location of the DMA buffer as a physical address and the
length of the buffer. Here, the driver calls the svatophys routine to translate the system virtual address of the DMA buffer to a physical
address in the command packet issued to the disk driver.
RETURN VALUES
The svatophys routine returns the following: The address translation has been completed successfully. Unable to perform address transla-
tion. This value indicates that the address specified by the kern_addr argument is not a valid kernel or system virtual address.
svatophys(9r)