John Sully
72bbf16c2f
Fix failure to wakeup from futex sleep due to fastlock_unlock reading the wrong offset in the asm version. Also fix false sharing in spinlock
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Former-commit-id: 4c8603815cf525c75dcc360fddeab9ca6fe70ae6
2019-11-17 16:06:49 -05:00
John Sully
1c1260d71f
Optimize deadlock detection, fix callstack for ASM, and annotate locks
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Note: This change moves our assembly code to use the GNU Assembler because NASM seems to be incapable of emitting the necessary debug information for callstack unwinding to work.
Former-commit-id: 600fc241cfe79b9b32ac6010c6ea0c66747f0f15
2019-10-22 21:34:51 -04:00
John Sully
b84d9671ec
Implement deadlock detection
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Former-commit-id: fa797408d9c5d5f12053641144fe1a8b24f66185
2019-10-22 00:43:32 -04:00
John Sully
0cd9bc48fc
Even the next up thread should sleep in the futex
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Former-commit-id: 8b76b01bfe710603bcdc101da6eb27afcee7e1b1
2019-06-17 23:00:12 -04:00
John Sully
5573f021c5
Fallback to a futex if we spin for a long time
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Former-commit-id: ec57b4b0248bba671e388a2257b1bd65ed8d0f44
2019-06-17 23:00:12 -04:00
John Sully
be3272ec38
Add debugging stats to the INFO command
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Former-commit-id: ac80a5c6a6676f45ac7d460a9cfb02fef8b48d78
2019-03-19 22:04:33 -04:00
John Sully
465b8a9ea7
write fastlock_unlock in ASM... because its faster
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Former-commit-id: bad73faf28f879d32c4064389b69c83e9474115a
2019-03-02 16:47:27 -05:00
John Sully
c8e0070fd4
tighten up the spinlock loop, and some other bikeshedding
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Former-commit-id: 8bd56fadd6e73794415e1f9eae892c772800e559
2019-03-01 13:29:21 -05:00
John Sully
7a4227915a
Rewrite our spinlock in assembly, pretty big performance improvement
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Former-commit-id: 40d7a701feefd36e9e3fdb6d516228c4a70fcf3d
2019-02-25 18:21:27 -05:00
