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Futex Resumed Etimedout Connection Timed Out

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In the meantime, to rule out memory-overcommit issues, which can cause problems with Java applications, can you try re-running your 2 vCPU case, but set a memory reservation for the VM You'll be able to ask questions about coding or chat with the community and help others. select resumed> ) = 0 (Timeout) [pid 1052205] 1457261183.644990 futex(0x780f60, FUTEX_WAIT, 0, {60, 0} [pid 1052206] 1457261183.645062 <... Similar Threads deriving RandomAccessFile? Source

TCP sessions freezing Hot Network Questions Are the guns on a fighter jet fixed or can they be aimed? In the uncontended case, a thread can access or modify the lock state with atomic instructions, for example atomically changing it from not acquired to acquired using an atomic compare-and-exchange instruction. EINVAL (FUTEX_CMP_REQUEUE_PI) The kernel detected an inconsistency between the user-space state at uaddr2 and the kernel state; that is, the kernel detected a waiter which waits via FUTEX_WAIT or FUTEX_WAIT_BITSET on The val2 and val3 arguments serve the same purposes as for FUTEX_CMP_REQUEUE.

Futex_wait_bitset_private Etimedout (connection Timed Out)

Escipally drop_caches works for my application too. The two processes each write 'num-loops' messages to the terminal and employ a synchronization protocol that ensures that they alternate in writing messages. */ #define _GNU_SOURCE #include #include #include Contributor blueyed commented Sep 3, 2016 • edited @zchee Any idea?

  • Also i found that when blocked, gc threads kept calling futex(), but failed.
  • This load, the comparison with val3, and the requeueing of any waiters are performed atomically and totally ordered with respect to other operations on the same futex word.
  • FUTEX_WAKE_OP Returns the total number of waiters that were woken up.
  • Re: Java Performance on VMware ESX tommyodom Jul 22, 2009 7:58 AM (in response to tommyodom) Well I hope you have better luck with support than i did.
  • Like Show 0 Likes (0) Actions 11.

It is important to note that the kernel will update the futex word's value prior to returning to user space. (This prevents the possibility of the futex word's value ending up Like Show 0 Likes (0) Actions 10. ETIMEDOUT The operation in futex_op employed the timeout specified in timeout, and the timeout expired before the operation completed. Futex Example One of my colleagues has written an excellent document,[ Java in Virtual Machines on VMware ESX: Best Practices|http://www.vmware.com/resources/techresources/1087], which provides guidance on avoiding these and other common issues when deploying Java

The constant FUTEX_BITSET_MATCH_ANY, which corresponds to all 32 bits set in the bit mask, can be used as the val3 argument for FUTEX_WAIT_BITSET and FUTEX_WAKE_BITSET. Futex Vs Mutex It also looks like the > >52 ms is a futex timeout but strace doesn't report which system call > >causes this. FUTEX_UNLOCK_PI (since Linux 2.6.18) This operation wakes the top priority waiter that is waiting in FUTEX_LOCK_PI on the futex address provided by the uaddr argument. http://man7.org/linux/man-pages/man2/futex.2.html futex resumed> ) = 0 futex(0x7f63fcf089e8, FUTEX_WAKE_PRIVATE, 1) = 0 gettimeofday({1245245764, 257517}, NULL) = 0 futex(0x7f63fc9c7a34, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7f63fc9c7a30, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1 futex(0x7f63fdc10294, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7f63fdc10290,

rhysh closed this Jun 23, 2015 sagar8192 commented Mar 6, 2016 I am having the same issue. Pthread Futex Note: You should create minimal init.vim and upload the reproduce ways. Besides the basic wait and wake-up futex functionality, there are further futex operations aimed at supporting more complex use cases. RE: High CPU usage issue / leap second? - Added by Romain F over 4 years ago I confirm same over CPU usage.

Futex Vs Mutex

Sign up now! As a start at demonstrating this, I recently published the results of some SPECjvm2008 experiments in VROOM!, the VMware Performance Engineering teams' blog. Futex_wait_bitset_private Etimedout (connection Timed Out) The op component has one of the following values: FUTEX_OP_SET 0 /* uaddr2 = oparg; */ FUTEX_OP_ADD 1 /* uaddr2 += oparg; */ FUTEX_OP_OR 2 /* uaddr2 |= oparg; */ FUTEX_OP_ANDN Futex Connection Timed Out I can imagine, if it's a virtual SMP box, that timing issues are likely to be worse than on a single CPU.

futex resumed> ) = 0 [pid 7763] select(0, NULL, NULL, NULL, {0, 10000} [pid 7991] futex(0x7fd1946b6720, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 7991] select(0, NULL, NULL, NULL, {0, 10000} this contact form Browse other questions tagged java io futex huge-pages or ask your own question. futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable) 193 futex(0x61fd04, FUTEX_WAIT_PRIVATE, 1080, NULL 195 futex(0x61fd04, FUTEX_WAIT_PRIVATE, 1082, NULL 193 <... Have you run the same applications in a non-virtual environment?Let me know how things work out,Hal Like Show 0 Likes (0) Actions 3. Futex Wait

Oh right, you noticed the (publicly available) source usually 'fades out' (goes into native's etc.) at all the interesting bits. Re: Java Performance on VMware ESX haroldr Jul 22, 2009 9:01 AM (in response to tommyodom) I am going to try to reproduce your problems with Ubuntu myself. The waiter can be removed from the wait on uaddr without requeueing on uaddr2 via a FUTEX_WAKE operation in another task. have a peek here what was causing this?

futex resumed> ) = 0 [..] 191 futex(0x61fae4, FUTEX_WAIT_BITSET_PRIVATE, 1042647, {57606, 988753989}, ffffffff) = -1 ETIMEDOUT (Connection timed out) 191 futex(0x61fb10, FUTEX_WAKE_PRIVATE, 1) = 0 191 clock_gettime(CLOCK_MONOTONIC, {40083, 988852185}) = 0 Linux Futex Tutorial Reload to refresh your session. By code, I meant the native code of RAF.

But from jstat -gcutil, the YGCT and FGCT was normal, only took serval seconds. –bforevdr Sep 1 '15 at 9:25 Can you check the paging I/O traffic (swapping) and

Most of them are running Java. One of these seems to be running away / waiting for something that's not going to happen. @aclements @RLH Contributor rhysh commented Jun 23, 2015 I haven't seen this on recent Where it is required, the uaddr2 argument is a pointer to a second futex word that is employed by the operation. Futex Example In C I decided to investigate the issue further this weekend and while running strace on the process I did see a loop identical to the one you posted.

futex resumed> ) = 0 futex(0x7f63fdc0fbd8, FUTEX_WAKE_PRIVATE, 1) = 0 futex(0x7f63fde63c64, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7f63fde63c60, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1 futex(0x7f63fdc10294, FUTEX_WAIT_PRIVATE, 7383, NULL <... restart_syscall resumed> ) = 0 futex(0x7f63fc9c8a98, FUTEX_WAKE_PRIVATE, 1) = 0 gettimeofday({1245245764, 257689}, NULL) = 0 gettimeofday({1245245764, 257725}, NULL) = 0 clock_gettime(CLOCK_REALTIME, {1245245764, 257756521}) = 0 futex(0x7f63fc9c7a34, FUTEX_WAIT_PRIVATE, 9, {0, 599968479} ) = 0 (Timeout) [pid 47155] 1433139204.018508 clock_gettime(CLOCK_MONOTONIC, [pid 47156] 1433139204.018525 select(0, NULL, NULL, NULL, {0, 100} [pid 47155] 1433139204.018541 <... Check This Out Are people of Nordic Nations "happier, healthier" with "a higher standard of living overall than Americans"?

One use of futexes is for implementing locks.