<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">Hi Ryan,</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">Thank for your help. But it turned out to be not working for me. I even commented out the `startTimer` and `stopTimer` in `rts/Timer.c`, but it seems not working as well.</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">For example. this program:</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">main = do</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><span class="Apple-tab-span" style="white-space:pre"> </span>forkIO $ forever $ print “a”</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><span class="Apple-tab-span" style="white-space: pre;"> </span>forkIO $ forever $ print “b”</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><span class="Apple-tab-span" style="white-space:pre"> </span>threadDelay 100000</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">When I added the `-threaded`, it will schedule normally, despite whether I commented out some code or add `-V0`. When I dropped `-threaded`, the `timerManager` stopped working as well, so it doesn’t make sense to me. Bad luck, but thank you all the way.</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">Zhen</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div> <div id="bloop_sign_1436067290817164032" class="bloop_sign"><div style="font-family:helvetica,arial;font-size:13px">-- <br>Zhen Zhang<br>USTC, China</div></div> <br><p class="airmail_on" style="color:#000;">On July 4, 2015 at 10:08:44 PM, Ryan Yates (<a href="mailto:fryguybob@gmail.com">fryguybob@gmail.com</a>) wrote:</p> <blockquote type="cite" class="clean_bq"><span><div><div></div><div>
<title></title>
<div dir="ltr">Hi Zhen,
<div><br></div>
<div>The RTS flag -V sets the tick interval (setting to 0
disables). If you grep for `RtsFlags.MiscFlags.tickInterval`
you can find where it gets used. Hope this helps.</div>
<div><br></div>
<div>Ryan</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sat, Jul 4, 2015 at 6:25 AM, Zhen Zhang
<span dir="ltr"><<a href="mailto:izgzhen@gmail.com" target="_blank">izgzhen@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">
Hi,</div>
<div style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">
<br></div>
<div style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">
I am trying to stop the GHC thread scheduler from atomically do
round-robin scheduling. It might be strange that I am asking for
that, in fact, my intention is to implement the “Lightweight
Concurrency” on top of current RTS system. I am trying to use
`GHC.Event`’s timeout mechanism to interfere with the scheduling
behavior and it seems working a bit. But the automatic scheduling
at the same time by RTS renders this effort invalid.</div>
<div style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">
<br></div>
<div style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">
For this part, I have tried to modify `rts/Scheduler.c`, masked
some `startTimer` in `schedule()`, change the `appendToQueue` to
`pushOnQueue` in `scheduleHandleYield` but nothing really works.
(The GHC is still doing RR scheduling, even I changed some key code
I thought)</div>
<div style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">
<br></div>
<div style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">
So I am curious if anyone familiar with the RTS could give me some
suggestions on this problem.</div>
<div><br></div>
<div>Thanks a lot!</div>
<div>
<div style="font-family:helvetica,arial;font-size:13px">
<span class="HOEnZb"><font color="#888888"><br>
Zhen</font></span></div>
<div style="font-family:helvetica,arial;font-size:13px">
<span class="HOEnZb"><font color="#888888"><br></font></span></div>
<div style="font-family:helvetica,arial;font-size:13px">
<span class="HOEnZb"><font color="#888888"><br></font></span></div>
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<br>
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