Thanks a lot, I can now reproduce it on my box. My immediate hypothesis would be it's due to virtual address space fragmentation: notice that v8 dies after performing 10 mark sweeps which fail to reclaim enough of garbage (last ones, going from 125.1 -> 125.0, the last one 125.0 -> 125.0)---that should be enough to exhaust process memory space. But it's only a hypothesis. I'd check if it's reproducible under Linux and update.
yours, anton. On Sat, Nov 21, 2009 at 12:38 AM, dracflamloc <[email protected]> wrote: > > Sorry for so many replies in a row, but I've isolated the code that > crashes v8. You can test this with the normal d8.exe and it crashes at > the same point my custom exe does. > > http://pastebin.com/m2f610e8 > > On Nov 20, 4:29 pm, dracflamloc <[email protected]> wrote: >> Small update: I rebuilt the lib using the visual studio sln instead of >> scons, and now the splay test runs fine using my executable. However >> my js still crashes. Can someone take a look at the cpp code and let >> me know if theres something I'm missing? Thanks >> >> On Nov 20, 3:53 pm, dracflamloc <[email protected]> wrote: >> >> >> >> > What do you mean by allocate a 'thing' in between? >> >> >http://pastebin.com/m10af9629 >> >> > Here is the cpp code for my exe. >> >> > On Nov 20, 3:13 pm, Anton Muhin <[email protected]> wrote: >> >> > > Could you post the code? If we could reproduce that under Windows, it >> > > might be easier to understand what goes on. >> >> > > How do you build v8, btw? >> >> > > I can run Erik's variant of splay just fine: >> >> > > d:\chromium\src\v8>shell.exe public-splay.txt --trace-g >> > > Scavenge 0.7 -> 0.6 MB, 2 ms. >> > > Scavenge 1.0 -> 1.0 MB, 2 ms. >> > > Scavenge 1.3 -> 1.3 MB, 2 ms. >> > > Scavenge 2.1 -> 2.0 MB, 5 ms. >> > > Scavenge 2.8 -> 2.8 MB, 5 ms. >> > > Mark-sweep 4.3 -> 4.2 MB, 20 ms. >> > > Scavenge 5.7 -> 5.6 MB, 7 ms. >> > > Mark-sweep 8.6 -> 8.5 MB, 38 ms. >> > > Mark-sweep 11.5 -> 11.3 MB, 45 ms. >> > > Scavenge 17.3 -> 17.1 MB, 31 ms. >> > > Mark-sweep 23.1 -> 22.8 MB, 99 ms. >> > > Mark-sweep 28.8 -> 28.5 MB, 119 ms. >> > > Scavenge 34.5 -> 34.2 MB, 34 ms. >> > > Mark-sweep 39.3 -> 39.1 MB, 156 ms. >> > > Scavenge 45.1 -> 44.8 MB, 35 ms. >> > > Mark-sweep 50.8 -> 50.5 MB, 191 ms. >> > > Scavenge 56.5 -> 56.3 MB, 34 ms. >> > > Scavenge 62.3 -> 62.0 MB, 33 ms. >> > > Mark-sweep 68.0 -> 67.7 MB, 249 ms. >> > > Scavenge 73.7 -> 73.4 MB, 34 ms. >> > > Scavenge 79.4 -> 79.2 MB, 35 ms. >> > > Scavenge 85.2 -> 84.9 MB, 35 ms. >> > > Mark-sweep 90.9 -> 90.6 MB, 323 ms. >> > > Scavenge 96.6 -> 96.4 MB, 36 ms. >> > > Scavenge 102.4 -> 102.1 MB, 36 ms. >> > > Scavenge 108.1 -> 107.8 MB, 36 ms. >> > > Scavenge 113.8 -> 113.5 MB, 37 ms. >> > > Mark-sweep 119.5 -> 119.3 MB, 371 ms. >> > > Scavenge 125.3 -> 125.0 MB, 37 ms. >> > > Scavenge 131.0 -> 130.7 MB, 37 ms. >> > > Scavenge 136.8 -> 134.5 MB, 28 ms. >> > > Scavenge 140.5 -> 134.5 MB, 16 ms. >> > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > Time (splay): 1954 us. >> >> > > (I am at trunk's 3339 now) >> >> > > Are you sure you do not allocate a thing in between? (it could lead >> > > to fragmentation of address space and eventual OOM). >> >> > > yours, >> > > anton. >> >> > > On Fri, Nov 20, 2009 at 10:29 PM, dracflamloc >> >> > > <[email protected]> wrote: >> >> > > > Thanks for the help, btw =) >> >> > > > I ran your splay test and it crashes as well. here is the trace: >> > > > Scavenge 34.5 -> 34.2 MB, 43 ms. >> > > > Mark-sweep 39.2 -> 38.9 MB, 199 ms. >> > > > Scavenge 45.0 -> 44.7 MB, 41 ms. >> > > > Mark-sweep 50.7 -> 50.4 MB, 243 ms. >> > > > Scavenge 56.4 -> 56.1 MB, 41 ms. >> > > > Scavenge 62.1 -> 61.9 MB, 42 ms. >> > > > Mark-sweep 67.9 -> 67.6 MB, 316 ms. >> > > > Scavenge 73.6 -> 73.3 MB, 43 ms. >> > > > Scavenge 79.3 -> 79.1 MB, 42 ms. >> > > > Scavenge 85.1 -> 84.8 MB, 42 ms. >> > > > Mark-sweep 90.8 -> 90.5 MB, 409 ms. >> > > > Scavenge 96.5 -> 96.2 MB, 44 ms. >> > > > Scavenge 102.2 -> 102.0 MB, 43 ms. >> > > > Scavenge 108.0 -> 107.7 MB, 44 ms. >> > > > Scavenge 113.7 -> 113.4 MB, 46 ms. >> > > > Mark-sweep 119.4 -> 119.1 MB, 519 ms. >> > > > Scavenge 125.2 -> 124.9 MB, 44 ms. >> > > > Scavenge 130.9 -> 130.6 MB, 45 ms. >> > > > Scavenge 136.6 -> 134.5 MB, 35 ms. >> > > > Scavenge 140.5 -> 134.5 MB, 18 ms. >> > > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > > Scavenge 142.5 -> 134.5 MB, 6 ms. >> > > > Scavenge 142.5 -> 134.5 MB, 7 ms. >> > > > crash... >> >> > > > I could post the code, however I'm not just using the vanilla v8 >> > > > engine. I've wrapped pdcurses functions and created my own. So my code >> > > > won't work in plain v8. However since even the splay test is crashing, >> > > > we already have a common code we can work from to try and figure this >> > > > out. >> >> > > > On Nov 20, 1:58 pm, Erik Corry <[email protected]> wrote: >> > > >> I attached the file. I am running with the command line >> >> > > >> ./v8 public-splay.txt --trace-gc >> >> > > >> I am using the Linux build. >> >> > > >> 2009/11/20 dracflamloc <[email protected]>: >> >> > > >> > Perhaps I'm missing something here. Could you post the flags you're >> > > >> > passing in, if any? >> > > >> > I assume the 140 you're getting is from the gc trace output? >> > > >> > Are there any special build parameters you're using? >> >> > > >> > I don't get why its happening, but it is. Is there anything I could >> > > >> > do >> > > >> > to investigate this better? >> >> > > >> If the JS file is something you can share then sending it to us would >> > > >> help us find out what is going on. >> >> > > >> > On Nov 20, 1:12 pm, Erik Corry <[email protected]> wrote: >> > > >> >> It seems to work for me. I quadrupled the size of the splay >> > > >> >> benchmark >> > > >> >> and I can run that without problems. It tops out at over >> > > >> >> 250Mbytes in >> > > >> >> the 64 bit version, around 140Mbytes in the 32 bit version (those >> > > >> >> fat >> > > >> >> pointers take up space!). >> >> > > >> >> 2009/11/20 dracflamloc <[email protected]>: >> >> > > >> >> > trace shows it gets to about 125MB and then can no longer free >> > > >> >> > memory >> > > >> >> > so it throws OOM. >> > > >> >> > I've attempted to use --max-old-space-size but always get the >> > > >> >> > same >> > > >> >> > result >> >> > > >> >> > I have tried this with 3339 and still it caps out at 125 in the >> > > >> >> > trace. >> >> > > >> >> > The thing is, I know where the memory is going (Lots of arrays), >> > > >> >> > however I don't know why its capping out at such a small RAM >> > > >> >> > usage. >> >> > > >> >> > On Nov 20, 4:20 am, Erik Corry <[email protected]> wrote: >> > > >> >> >> 2009/11/20 dracflamloc <[email protected]>: >> >> > > >> >> >> > # >> > > >> >> >> > # Fatal error in (null) >> > > >> >> >> > # Allocation failed - process out of memory >> > > >> >> >> > # >> >> > > >> >> >> > Hello, I have v8 running in a VC++ 2005 console application. >> > > >> >> >> > I'm >> > > >> >> >> > running a script thats pretty simple, but is memory >> > > >> >> >> > intensive. However >> > > >> >> >> > the script always crashes after a few seconds while its >> > > >> >> >> > creating >> > > >> >> >> > arrays/objects with an out of memory error. >> >> > > >> >> >> > This computer has 3GB of RAM. How can I enable a script to >> > > >> >> >> > access all >> > > >> >> >> > available memory before throwing the OOM error, if it is >> > > >> >> >> > indeed >> > > >> >> >> > cutting off at 150MB? >> >> > > >> >> >> We had a bug until recently where you could get out of memory >> > > >> >> >> errors >> > > >> >> >> without actually having run out of memory. make sure you have a >> > > >> >> >> version at least as recent as 3285 on the bleeding edge or 3333 >> > > >> >> >> on the >> > > >> >> >> trunk. >> >> > > >> >> >> You can run the VM with --trace-gc to see how much memory it is >> > > >> >> >> actually using. >> >> > > >> >> >> There is an option --max-old-space-size for increasing the >> > > >> >> >> amount of >> > > >> >> >> memory available to V8. >> >> > > >> >> >> I think the developer tools have some functions for tracing >> > > >> >> >> where >> > > >> >> >> memory is going, but I am not personally familiar with them. >> >> > > >> >> >> -- >> > > >> >> >> Erik Corry >> >> > > >> public-splay.txt >> > > >> 14KViewDownload > > > --~--~---------~--~----~------------~-------~--~----~ v8-users mailing list [email protected] http://groups.google.com/group/v8-users -~----------~----~----~----~------~----~------~--~---
