and autumn in the negative and good and bad three people have Rams have TSO have Guliangzhuan by the Ming Fang read the son pinch it to remember the five children have Yang Yang neutron and old Zhuang through the son read through the history of the descent from Xi farmers to the Yellow Emperor San Huang Habitat Tangyou The second emperor Ibo the Xiayou called Tangzhou Home World 400 Move Shariton Daxia 600 to King Zhou died King Wu King Zhou 800 load
and autumn in the negative and good and bad three people have Rams have TSO have Guliangzhuan by the Ming Fang read the son pinch it to remember the five children have Yang Yang neutron and old Zhuang through the son read through the history of the descent from Xi farmers to the Yellow Emperor San Huang Habitat Tangyou The second emperor Ibo the Xiayou called Tangzhou Home World 400 Move Shariton Daxia 600 to King Zhou died King Wu King Zhou 800 load
and autumn in the negative and good and bad three people have Rams have TSO have Guliangzhuan by the Ming Fang read the son pinch it to remember the five children have Yang Yang neutron and old Zhuang through the son read through the history of the descent from Xi farmers to the Yellow Emperor San Huang Habitat Tangyou The second emperor Ibo the Xiayou called Tangzhou Home World 400 Move Shariton Daxia 600 to King Zhou died King Wu King Zhou 800 load
and autumn in the negative and good and bad three people have Rams have TSO have Guliangzhuan by the Ming Fang read the son pinch it to remember the five children have Yang Yang neutron and old Zhuang through the son read through the history of the descent from Xi farmers to the Yellow Emperor San Huang Habitat Tangyou The second emperor Ibo the Xiayou called Tangzhou Home World 400 Move Shariton Daxia 600 to King Zhou died King Wu King Zhou 800 load
and autumn in the negative and good and bad three people have Rams have TSO have Guliangzhuan by the Ming Fang read the son pinch it to remember the five children have Yang Yang neutron and old Zhuang through the son read through the history of the descent from Xi farmers to the Yellow Emperor San Huang Habitat Tangyou The second emperor Ibo the Xiayou called Tangzhou Home World 400 Move Shariton Daxia 600 to King Zhou died King Wu King Zhou 800 load
:
Memory Model name
Corresponding Processor
Store-Load re-sorting
Store-Store re-sorting
Load-Load and Load-Store re-sorting
Allows you to read data from other processors earlier.
Can read the current processor's write earlier
TSO
Sparc-TSOX64
Y
Y
PSO
Iscsi-PSO
Y
Y
Y
RMO
Ia64
Y
Y
Y
Y
PowerPC
PowerPC
Y
Y
Y
Y
Y
' * Y0 = n ';A '(x-x0) + B' (y-y0) = 0;Because gcd (A', B ') = 1, there is a' | (y-y0)Then you can make y = y0-a '* T (t is an integer), then you can get x = x0 + B' * tSo y = y0-a '* t, x = x0 + B' * t is AX + by = n.Y = (N * y '/D)-(A/D) * t;X = (N * x'/D) + (B/d) * t;
8). At this moment, the t we want is the XWhile Minx = x % B '= (x0 + B' * t) % B '= x0 % B' = (N * x'/d) % B'NOTE: If Minx is a negative number, the number after modulo is smaller th
), network, and scheduler locks.* Optimizes the SMP architecture introduced by the 5.x and 6.x branches.Some performance tests show that this version of FreeBSD linearly increases the performance of up to 8 CPUs with the number of CPUs. Many workloads have significantly improved performance in multi-core systems.-The ule scheduler has been greatly improved, including improvements in performance and interactive application response (the 4bsd scheduler is still the default scheduler in 7.0, but we
-locked (meaning it doesn't allow for much parall1_m in the OS), and it's actually deprecated and will be dropped in FreeBSD 7. the replacementLncIsLeAnd it's present at least in FreeBSD 6.2 and newer, but it's not supported in the default generic kernel. Thus, you'll have to configure and compile a custom kernelDevice lncReplacedDevice le. (Just loadingIf_leKernel module won't work becauseLncDriver present in the kernel at boot time will detect and use the hardware first .)
There's an uninitia
from the TOS domain in the IPv4 header. The traffic control module classifies packet based on this field to determine the scheduling policy.
· _ U8 local_df: 1,· Cloned: 1,· Ip_summed: 2,· Nohdr: 1,· Nfctinfo: 3;
To quickly reference a skb's data,When cloning an existing SKB, a new SKB is generated, but this SKB shares the data zone of the existing SKB.When a SKB is cloned, "cloned" in the original and new SKB structures will be set to 1.
(The 'local _ df' field is used by the IPv4 protocol, an
layer protocol header in the data packet (this is particularly important! For example, in the case of TSO/UFO, the NIC Driver requires the location information of the protocol header to calculate the verification value. Therefore, although skb does not remember the location of the protocol header, a data packet can be encapsulated, however, it is incorrect for the complete implementation of the protocol stack. After all, the NIC Verification Code has
packet to be sent must be re-encapsulated with an IP header. If the data is finally sent through ethX, the MTU is 1500 by default. If the MTU of the ipip Tunneling Device is 1500 or less than 1500 minus the head overhead, the MTU will be updated, the next hop cache contains the MTU information. If the MTU needs to be updated, the next hop cache needs to be updated.
In general physical devices, this is not a problem, because MTU is known before the IP layer sends data, but for ipip tunneling dev
It should be known that no software engineer trained in professional ethics will agree to write a function like "Destroy Baghdad destroybaghdad. On the contrary, the basic professional ethics requires him to write a function "Destroy City destroycity", where "Baghdad" is a parameter. (Nathaniel s Borenstein)
There are only two computer languages: some languages are scolded every day, and others are not used. (Bjarne stroustrup)
Should the array subscript start from 0 or 1? My proposal
arrive at the cache and memory in order, but there are
Delay. With this attribute, a multi-processor system is called full storage sequence.
(TSO: total store order ).
If one processor writes data to address a at a time and then reads address B, the other processor then writes data to address B.
Write, and then read the address. The expected result is that the first processor obtains the new value of B, or the second value.
The processor obtains the
array, so the expressions have similar meanings to each other? Only a, * (a + 1), a [2], etc,C) pointer ArrayA pointer array means that each element in an array is a pointer. For example:Int * P [10]; // instead of INT (* P) [10]OrChar * P [10];P is a pointer (the value is the same as P [0 );Int T [10];Int * PT = T; // Use PT to point to TSo what do we use here to point to T in int * t [10? We want to use a pointer:Int ** Pt = T;This is because, in
Euclidean algorithm: Also known as the Euclidean methodGCD (A, B) =gcd (B,A%B);termination conditions A=GCD b=0;(GCD is a, B greatest common divisor)Extended Euclidean algorithm: A and B greatest common divisor is gcd, must be able to find such x and Y, making: a*x + b*y = GCD establishedWe only need to find special solution x0,y0;The general solution is X = x0 + (B/GCD) *t y = y0– (A/GCD) *tSo how do we find the next set of solutions?Modeled after Eu
When we write some test tools, often need to use to the configuration file, when the general choice of INI file is more appropriateStandard and can be named by the parameter to know the meaning of the parameter, then how to use Python to read and write INI file?First look at, read the INI file, we directly use the Python module Configparser to read and write the configuration fileLook at the code.def readconfig (Configpath): configdict = {} CF = Configparser.configparser () cf.read (Con
code also outputs the values of each element of the array. However, you try to change the PA in {} to a. You will find that the program compiles errors and does not succeed. It seems that pointers and array names are different. In fact, the pointer above is a pointer variable, and the array name is just a pointer constant. This code is different from the above code, the pointer pa in the entire loop, its value is constant increment, that is, the pointer value is modified. The array name is a po
operating system, although it still transmits 5 packets on the final line, which saves CPU resources and provides performance gains:You can use ethtool -k eth0 the current offloading condition to view the NIC:The above example checksum and TCP segmentation offloading are all open. If you want to set the offloading switch for the NIC, you can use the ethtool -K (note k is uppercase) command, for example, the following command closes the TCP segmentation offload:sudo ethtool -K eth0
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.