The interrupt to process latency reflects the measured interval that a usermode process needed to respond to a hardware request from the moment the interrupt service routine started execution. MEASURED INTERRUPT TO USER PROCESS LATENCIES Disable variable speed settings like Intel Speed Step and AMD Cool N Quiet in the BIOS setup for more accurate results. Note: reported execution times may be calculated based on a fixed reported CPU speed. Hardware: Gigabyte Technology Co., Ltd., Z170X-Gaming 7ĬPU: GenuineIntel Intel(R) Core(TM) i5-6500 CPU 3.20GHz LatencyMon has been analyzing your system for 0:00:42 (h:mm:ss) on all processors. One problem may be related to power management, disable CPU throttling settings in Control Panel and BIOS setup. Also one or more ISR routines that belong to a driver running in your system appear to be executing for too long. One or more DPC routines that belong to a driver running in your system appear to be executing for too long. You are likely to experience buffer underruns appearing as drop outs, clicks or pops. I myself searched for a solution the past 4 weeks.Your system appears to be having trouble handling real-time audio and other tasks. I think Apache should put this in the FAQ or something, i have found quite a few people on the web having this issue not resolved. On the LAN it doesnt appear, as i contacted my provider for support, and they weren't able to determine any difference in speed between MS IIS and Apache running in parallel on my server back then, probably downloading from it via LAN. The slowdown seems only to occur on high latency lines, like 60ms RTT. In that case Apache should mention this somewhere IMO, or as you said Frank, disable it by default. Well maybe its not really a problem/bug, but rather an incompatibility of Win2003 with the sendfile directive. I run Apache 2.2.10 on a Windows 2003 圆4 SP2 standard virtual server with 100Mbit internet connection, so the problem still exists in the most recent version. I would never have thought of Sendfile to cause this, after turning it off my Apache worked like a charme instantly! So i assumed Apache somehow did not care about the SendBufferSize Directives, because i couldnt notice any difference when using them, so i tried hardcoding the 64k value, no change. I had the same issue with my FTP server, but that vanished after i increased its Sendbuffer size from 16 to 64kb.
I even tried Apache 2.0 and 1.3 with the same problem. I was already compiling Apache and messing with the code trying to figure out why it was so slow (200kbyte/s instead of 650). Thanks Frank, im so glad i took a look in here.
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