To put these elements into context, below is an example of how LMAX uses the Disruptor within its high The canonical example from LMAX is where we have three operations, journalling (writing the input data
本文深入解析LMAX架构的设计哲学,并结合Java线程模型优化实践,揭示如何构建超低延迟系统。文中所有技术方案均经过生产环境验证,包含可落地的优化策略。 LMAX架构核心设计思想 LMAX架构源于伦敦多资产交易所的交易系统,其核心目标是突破物理极限实现纳秒级处理延迟。 LMAX架构中,输入处理器(Input Handler)将外部请求转化为领域事件,通过Disruptor路由到业务处理器(Business Logic Processor),最后通过输出处理器(Output LMAX架构提供范式参考,但具体实施需结合业务特点。
首先,LMax1<=RMin1,LMax2<=RMin2 这是肯定的,因为数组是有序的,左边肯定小于右边!,而如果割(Cut)在某个数上,则左右相等。 其次,如果我们让LMax1<=RMin2,LMax2<=RMin1 呢 那么如果左半边全小于右半边,如果左边的元素个数相加刚好等于k, 那么第k个元素就是Max(LMax1, LMax2),这个比较好理解的 ,因为Max(LMax1, LMax2)肯定是左边k个元素的最大值,因为合并后的数组是有序,第k个元素肯定前面k个元素中最大的那个。 = 5, LMax2=1, RMin2=4, 满足 LMax1 < RMin2 且 LMax2 < RMin1 , 所以第3个元素为Max(LMax1,LMax2) = 3 两个数组的最大问题是,它们合并后 左边:A[m+n+1] = Max(LMax1,LMax2) 右边:A[m+n+2] = Min(RMin1,RMin2) ==>Mid = (A[m+n+1]+A[m+n+2])/2 = (Max(LMax1
nums2[c2/2] : INT_MAX; if (LMax1 > RMin2)end_pos = c1 - 1; else if(LMax2 > RMin1 )start_pos = c1 + 1; else break; } return (max<long>(LMax1, LMax2) + min< int LMax1, LMax2, RMin1, RMin2, c1, c2, lo = 0, hi = 2 * n; //我们目前是虚拟加了'#'所以数组1是2*n长度 while (lo < INT_MAX : nums2[c2 / 2]; if (LMax1 > RMin2) hi = c1 - 1; else if (LMax2 > RMin1) lo = c1 + 1; else break; } return (max(LMax1, LMax2) + min(RMin1, RMin2)) / 2.0; } };
如果 ,那么 l 处根本就没法蓄水,因为它是最高的,所以更新 lmax 就行了。否则的话 l 两边最大高度较小值一定是 lmax ,还是按照方法 1 那样计算就行了。 (n+1, 0); for (int i = 0; i < n; ++i) { lmax[i+1] = max(height[i], lmax[i]); ) lmax = height[l]; else res += lmax - height[l]; l++; } = [0] * (n+1) for i in range(n): lmax[i+1] = max(height[i], lmax[i]) rmax : lmax = height[l] else: res += lmax - height
<=rmin2,andlmax2<=rmin1lmax1 <= rmin2 ,\quad and \quad lmax2 <= rmin1lmax1<=rmin2,andlmax2<=rmin1 , 成功找到分界线 则 Lmax=max(lmax1,lmax2))Lmax = max(lmax1,lmax2))Lmax=max(lmax1,lmax2)) , Rmin=min(rmin1,rmin2 )Rmin = min(rmin1, rmin2)Rmin=min(rmin1,rmin2) ,总个数为奇数返回 RminRminRmin , 偶数返回 (Lmax+Rmin)/2.0(Lmax+Rmin )/2.0(Lmax+Rmin)/2.0 ? nums1[mid1] : INT_MAX; lmax2 = (mid2-1 >= 0) ?
为nums1左侧的最大元素,RMin1为nums1右侧的最小元素 LMax2为nums2左侧的最大元素,RMin2为nums2右侧的最小元素 可以得知目前 LMax1=9 , RMin1=9 , LMax2 =2, RMin2 = 6 LMax1≤RMin1 , LMax2≤RMin2 必定成立(题目说明是从小到大排序) 只要满足LMax1≤RMin2, LMax2≤RMin1,我们就可以使用下列公式获得中位数 max(LMax1, LMax2) + min(RMin1, RMin2)) / 2 接下来看看代码 #include <iostream> #include <vector> using namespace int LMax1, LMax2, RMin1, RMin2, c1, c2, lo = 0, hi = 2 * n; //我们目前是虚拟加了'#'所以数组1是2*n长度 while return (max(LMax1, LMax2) + min(RMin1, RMin2)) / 2.0; } }; int main() { // [#5#9#10#] vector
[n], Rmax[n]; Lmax[0] = h[0]; for(i = 1; i < n; ++i) Lmax[i] = max(h[i],Lmax Rmax[i] = max(h[i],Rmax[i+1]); for(i = 1; i < n-1; ++i)//两边永远装不了水 s += min(Lmax int>& h) { if(h.empty()) return 0; int l = 0, r = h.size()-1, s = 0; int Lmax = 0; while(l < r) { if(h[l] < h[r])//右边肯定有堵高墙 { h[l] >= Lmax (Lmax = h[l]) : s += Lmax-h[l]; //我不是左边最高的,就能盛水 ++l; } else//h[
<math.h> using namespace std; typedef long long int LL; const int maxn=2*1e3; LL mmax[maxn*35]; LL lmax int r[maxn*35]; LL ll[maxn*35]; LL rr[maxn*35]; int n; int p; int newnode() { l[p]=r[p]=-1; lmax =-1) { if(c[node]) { lmax[node]=rmax[node]=mmax[node]=R-L+1; ll[node]=L,rr[node]=R; } else { lmax[node]=rmax[node]=mmax[node]= [l[node]]==(mid-L+1)) lmax[node]=lmax[l[node]]+lmax[r[node]]; else lmax[node]=lmax
本文整理匯總了Java中com.lmax.disruptor.RingBuffer.publish方法的典型用法代碼示例。 您也可以進一步了解該方法所在類com.lmax.disruptor.RingBuffer的用法示例。 示例1: channelRead0 點讚 3 import com.lmax.disruptor.RingBuffer; //導入方法依賴的package包/類 @Override protected ringBuffer.publish(next); } } } } 開發者ID:ogcs,項目名稱:Okra-Ax,代碼行數:18, 示例2: channelRead0 點讚 3 import com.lmax.disruptor.RingBuffer } } } } 開發者ID:ogcs,項目名稱:Okra,代碼行數:18, 示例3: stampSequenceIdAndPublishToRingBuffer 點讚 3 import com.lmax.disruptor.RingBuffer
Result := False; end; end; 4 检测无效端口 function CheckWrongPort(Port:String):Boolean; var iPort,lMax ,lMin:Longint; begin lMax := 65535; lMin := 0; iPort := StrToIntDef(Port,-1); if iPort <> - 1 then //有效字符 begin if (iPort >= lMin) and (iPort <= lMax) then Result := False end else Result := True; end; 5 检测有效端口 function CheckValidPort(Port:String):Boolean; var iPort,lMax ,lMin:Longint; begin lMax := 65535; lMin := 1024; iPort := StrToIntDef(Port,0); if (iPort <=lMax
/disruptor/queue/OneToOneQueueThroughputTest.java package com.lmax.disruptor.queue; import com.lmax.disruptor.AbstractPerfTestQueue ; import com.lmax.disruptor.support.ValueAdditionQueueProcessor; import com.lmax.disruptor.util.DaemonThreadFactory static com.lmax.disruptor.RingBuffer.createSingleProducer; import static com.lmax.disruptor.support.PerfTestUtil.failIfNot .*; import com.lmax.disruptor.support.PerfTestUtil; import com.lmax.disruptor.support.ValueAdditionEventHandler ; import com.lmax.disruptor.support.ValueEvent; import com.lmax.disruptor.util.DaemonThreadFactory;
using namespace std; const int maxn = 2e5 + 5; struct line { int l, r; int sum, len, add, w, lmax ans; } t[4 * maxn]; void push_up(int u) { t[u].sum = t[u << 1].sum + t[u << 1 | 1].sum; t[u].lmax = t[u << 1].lmax; t[u].lmax += t[u << 1].lmax == t[u << 1].len ? t[u << 1 | 1].lmax : 0; t[u].rmax = t[u << 1 | 1].rmax; t[u].rmax += t[u << 1 | 1].rmax == t[ < 1].rmax : 0; t[u].ans = max({t[u << 1].ans, t[u << 1 | 1].ans, t[u << 1].rmax + t[u << 1 | 1].lmax
这里我采用的是com.lmax.disruptor.dsl.ProducerType#MULTI消费模式,注册消费者用的是com.lmax.disruptor.dsl.Disruptor#handleEventsWithWorkerPool import com.lmax.disruptor.RingBuffer import com.lmax.disruptor.WorkHandler import com.lmax.disruptor.YieldingWaitStrategy import com.lmax.disruptor.dsl.Disruptor import com.lmax.disruptor.dsl.ProducerType import org.apache.http.client.methods.HttpGet import com.lmax.disruptor.RingBuffer import com.lmax.disruptor.WorkHandler import com.lmax.disruptor.YieldingWaitStrategy import com.lmax.disruptor.RingBuffer import com.lmax.disruptor.WorkHandler import com.lmax.disruptor.YieldingWaitStrategy
——普列汉诺夫 官方文档: LMAX Disruptor github: GitHub - LMAX-Exchange/disruptor: High Performance Inter-Thread Messaging Library Disruptor是由LMAX Exchange开发的一个高性能并发框架,专门用于处理需要低延迟和高吞吐量的场景。 引入依赖: <dependency> <groupId>com.lmax</groupId> <artifactId>disruptor</artifactId> <version >4.0.0</version> </dependency> 示例代码 下面是一个简单的Disruptor示例,展示了如何创建一个基本的生产者-消费者模型: import com.lmax.disruptor.EventFactory ; import com.lmax.disruptor.EventHandler; import com.lmax.disruptor.RingBuffer; import com.lmax.disruptor.dsl.Disruptor
package com.example.disruptor.singleton; import com.example.disruptor.Product; import com.lmax.disruptor.RingBuffer ; import com.lmax.disruptor.YieldingWaitStrategy; import com.lmax.disruptor.dsl.Disruptor; import com.lmax.disruptor.dsl.ProducerType 4:指定等待策略,Disruptor 定义了 com.lmax.disruptor.WaitStrategy 接口用于抽象 Consumer 如何等待Event事件。 .*; import com.lmax.disruptor.dsl.Disruptor; import com.lmax.disruptor.dsl.ProducerType; import java.util.concurrent.ExecutorService ; import com.lmax.disruptor.EventFactory; import com.lmax.disruptor.dsl.Disruptor; import com.lmax.disruptor.dsl.ProducerType
com.disruptor; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import com.lmax.disruptor.EventFactory ; import com.lmax.disruptor.EventHandler; import com.lmax.disruptor.RingBuffer; import com.lmax.disruptor.WaitStrategy ; import com.lmax.disruptor.YieldingWaitStrategy; import com.lmax.disruptor.dsl.Disruptor; import com.lmax.disruptor.dsl.ProducerType void setValue(String value) { this.value = value; } } package com.disruptor; import com.lmax.disruptor.EventFactory Exception { System.out.println(event.getValue()); } } package com.disruptor; import com.lmax.disruptor.RingBuffer
length < 3) { //当存在临界值的时候直接返回 return 0L; } long value = 0; int lmax = arr[0], rmax = arr[length - 1], l = 1, r = length - 2; while (l <= r) { if (lmax <= rmax) { value += Math.max(0, lmax - arr[l]); lmax = Math.max(lmax
; import com.lmax.disruptor.IgnoreExceptionHandler; import com.lmax.disruptor.RingBuffer; import com.lmax.disruptor.SequenceBarrier ; import com.lmax.disruptor.WorkHandler; import com.lmax.disruptor.WorkerPool; public class WorkProcessorMain ; import com.lmax.disruptor.EventFactory; import com.lmax.disruptor.dsl.Disruptor; import com.lmax.disruptor.dsl.EventHandlerGroup ; import com.lmax.disruptor.ExceptionHandler; import com.lmax.disruptor.RingBuffer; import com.lmax.disruptor.SequenceBarrier ; import com.lmax.disruptor.WorkerPool; import com.lmax.disruptor.YieldingWaitStrategy; import com.lmax.disruptor.dsl.ExceptionHandlerWrapper
和rmax,lmax[i]表示下标i左边最高柱子的高度,rmax[i] 表示下标i右边最高柱子的高度,很明显,只需要一趟遍历就可以得到结果。 def trap(height): #边界条件 if len(height)<3: return 0 n=len(height) lmax =[0]*n rmax=[0]*n ans=0 #初始化左右峰 lmax[0]=height[0] rmax[n-1]=height[n-1] #储存左右峰 for i in range(1,n): lmax[i]=max(height[i],lmax[i-1]) for j in range ]=max(height[j],rmax[j+1]) #遍历 比较每个位置可以存多少水 for k in range(n): if min(rmax[k],lmax