试图删除指针的linkedlist的第一个元素时，C++内存泄漏

我对C++还很陌生，两天来我遇到了一个大问题。我正试图用posix线程进行多线程渲染（光线投射、多采样、环境遮挡），每次运行该程序时，它都会消耗大约5GB的RAM（在线程启动后），直到终止。很明显我的记忆力有问题。我的工作线程是这样工作的：

struct Job
{
    AOSampler sampler;
    Ray ray;
    bool abool;
    int someint;
    .
    .
    //no pointers here
};
//global
//use of C++ STL list
list<Job*> * jobs;

//Part of thread posix function starts here
list<Job*> tjobs;
// Mark 1    
//Pushing and popping between "tjobs" the threadjobs just for this thread and the global jobpool "jobs". Of course threadsafe with mutex locking.
//The thread pops jobs from "jobs" and puts em into "tjobs"
while(!tjobs.empty())
{
    //many calculations but all vars are on stack, besides creating new jobs an pushing them to some other queue, which will be pushed into "jobs" later
    // !!!THE PROBLEM!!!
    delete (tjobs.front());
    tjobs.pop_front();
    // The memory in htop always rises but never decreases!
}
// jumps to Mark 1
// end of multithread while

代码在许多核心上编译、运行和终止，但性能很差（4好，24坏，这是一台24核心机器）。我认为这可能是因为5GB的内存使用量（占所有phys.ram的四分之一），但操作系统和缓存可能无法很好地处理这一问题。

我迫切希望找到解决问题的办法。我的谷歌搜索对我一点帮助都没有。我希望你能帮上忙。非常感谢你的帮助。

谢谢

（对不起我的英语）

第1版：忘了提一下，它还没有输出->我无法验证它是否是有效的

第2版：一些标题：

class AOSampler
{
public:
    AOSampler();
    /// constructor that initializes the sampler, just calls init
    AOSampler(vec3 const & normal, vec3 const & color);
    /// initializes the sampler
    void init(vec3 const & normal, vec3 const & color);
    /// returns an importance sampled random direction and the associated weight
    void sample(vec3 & sampledDirection, vec3 & sampleWeight) const;
private:
    /// orthonormal basis
    vec3 m_normal;
    vec3 m_tangent;
    vec3 m_bitangent;
    /// diffuse color
    vec3 m_color;
};
class Ray
{
public:
    Ray() : tMin(0.001f), tMax(FLT_MAX){}
    vec3 origin;
    vec3 direction;
    float tMin, tMax;
};
class vec3
{
public:
    float x,y,z;
    vec3();
    vec3(float a, float b, float c);
    /// assignment operator that assigns a single scalar value to all components
    void operator=(float v);
    /// unsafe element access 
    float operator[](unsigned int i) const
    {
        return (&x)[i];
    }
    /// length of the vector
    float length() const;
    ///Returns a normalized version of the vector
    vec3 normalize() const;
    /// componentwise summation
    vec3 add(const vec3& a) const;
    /// componentwise subtraction
    vec3 subtract(const vec3& a) const;
    ///compute the dot product which is cos(alpha) * this.Length * a.Length
    ///where alpha is the (smaller) angle between the vectors
    float dot(const vec3& a) const;
    float minComponent() const;
    float maxComponent() const;
    ///computes a vector which is orthogonal to both of the input vectors
    static vec3 cross(const vec3& a, const vec3& b);
    static vec3 min(const vec3& a, const vec3& b);
    static vec3 max(const vec3& a, const vec3& b);
    /// add a vector to this vector
    void operator+=( vec3 const & v );
    /// subtract a vector from this vector
    void operator-=( vec3 const & v );
};