![]() Unsigned long later = jiffies + 5*HZ /* five seconds from now */ Unsigned long next_tick = jiffies +_1 /* one tick from now */ Unsigned long time_stamp = jiffies /* now */ For example, code often needs to set a value for some time in the future, for example: Likewise, this code converts from jiffies to seconds: The following code converts from seconds to a unit of jiffies: For now, let's look at some sample kernel code. In the next section, we will look at its actual definition, which is a bit peculiar. As we have seen in this chapter, however, a jiffy in Linux can have various values. In operating systems, especially Unix, a jiffy is the time between two successive clock ticks. In the United States, this is 1/60 of a second. In electrical engineering, a jiffy is the time to complete one AC (alternating current) cycle. In computer engineering, a jiffy is often the time between two successive clock cycles. In physics, a jiffy is sometimes used to refer to the time it takes for light to travel some specific distance (usually a foot or a centimeter or across a nucleon). In scientific applications, jiffy represents various intervals of time, most commonly 10ms. In lay terms, jiffy refers to an indeterminate but very brief period of time. Phrases such as in a jiffy are thought to originate from eighteenth-century England. The system uptime is therefore jiffies/HZ seconds. Thus, because there are HZ timer interrupts in a second, there are HZ jiffies in a second. On boot, the kernel initializes the variable to zero, and it is incremented by one during each timer interrupt. Media streams are already setup when agent is brought into conference thus no dead air, and first bit of conversation will not be cut off.The global variable jiffies holds the number of ticks that have occurred since the system booted. Agent answers and is brought into conference. Based on geographic location of the CQ call and agent, there may be a slight delay in setting up the media streams which may result in some dead air and the first part of the conversation being cut off.Ĭonference Mode Enabled: CQ call is put into conference. Agent answers and media streams are setup. The following bullet points detail the difference between both modes:Ĭonference Mode Disabled: CQ call is presented to agent. Conference mode significantly reduces the amount of time it takes for a caller to be connected to an agent, after the agent accepts the call. The ConferenceMode parameter indicates whether or not Conference mode will be applied on calls for this Call queue. This example creates a Call Queue for the organization named "Help Desk" with music on hold and welcome music audio files. Example 2 New-CsCallQueue -Name "Help desk" -RoutingMethod Attendant -DistributionLists "868dccd8-d723-4b4f-8d74-ab59e207c357") -AllowOptOut $false -AgentAlertTime 30 -OverflowThreshold 15 -OverflowAction Forward -OverflowActionTarget 7fd04db1-1c8e-4fdf-9af5-031514ba1358 -TimeoutThreshold 30 -TimeoutAction Disconnect -MusicOnHoldAudioFileId 1e81adaf-7c3e-4db1-9d61-5d135abb1bcc -WelcomeMusicAudioFileId 0b31bbe5-e2a0-4117-9b6f-956bca6023f8 This example creates a Call Queue for the organization named "Help Desk" using default music on hold.
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