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29 Commits (master)
| Author | SHA1 | Message | Date |
|---|---|---|---|
Abseil Team
|
4ed8e46f1b |
Force a conservative allocation for pointers to methods in Condition objects.
In order for Condition to work on Microsoft platforms, it has to store pointers to methods that are larger than we usually expect. MSVC pointers to methods from class hierarchies that employ multiple inheritance or virtual inheritance are strictly larger than pointers to methods in class hierarchies that only employ single inheritance. This change introduces an opaque declaration of a class, which is not fulfilled. This declaration is used to calculate the size of the Condition method pointer allocation. Because the declaration is of unspecified inheritance, the compiler is forced to use a conservatively large allocation, which will thereby accommodate all method pointer sizes. Because the `method_` and `function_` callbacks are only populated in mutually exclusive conditions, they can be allowed to take up the same space in the Condition object. This change combines the `method_` and `function_` fields and renames the new field to `callback_`. The constructor logic is updated to reflect the new field. PiperOrigin-RevId: 486701312 Change-Id: If06832cc26f27d91e295183e44dc29440af5f9db |
2 years ago |
|
Abseil Team
|
b3e64c4168 |
Mutex: Fix stall on single-core systems
On single-core systems, a thread could be preempted while holding an absl::Mutex, or even worse, the spin lock. If a FIFO thread wakes up and tries to acquire this lock, it might not be able to yield() to the sleeping thread. Within MutexDelay(), a yield() and a sleep(10us) are used to yield the CPU. The yield() would do nothing if the calling thread holds the highest priority in the system. The 10us sleep() may not be able to reach the scheduler either, if the system is slow enough. This code path is known to be reachable in the following scenarios: - a FIFO thread calls LockSlowLoop() with spin lock held by a normal thread - a FIFO thread calls LockWhen*() with the Mutex held by a normal thread for a long time - a FIFO thread calls Await*(), releases the Mutex to be held by a normal thread for a long time This CL adds a mutex global for the sleep time, and sets it using the return time of the a yield() call. Yield() must reach the scheduler even when it fails to yield to anyone, and would allow sleep() to do the same. A small constant multiplier (5) is also applied to overcome uncontrollable factors in the runtime and help sleep() to consistently yield to another thread. Upper and lower bounds for the sleep time is also controlled to block any unreasonable values. PiperOrigin-RevId: 483459711 Change-Id: I14efadbadaf9244a2462f377b515147bda651c89 |
2 years ago |
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Abseil Team
|
76466b85fb |
Changes mutex unlock profiling
PiperOrigin-RevId: 479667897 Change-Id: I6085df8bfcfb009806230f8d71b576a1371a4d1f |
2 years ago |
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Abseil Team
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69199fcebe |
Fix "unsafe narrowing" warnings in absl, 9/n.
Addresses failures with the following, in some files: -Wshorten-64-to-32 -Wimplicit-int-conversion -Wsign-compare -Wsign-conversion -Wtautological-unsigned-zero-compare (This specific CL focuses on miscellaneous non-test source files.) Bug: chromium:1292951 PiperOrigin-RevId: 473054605 Change-Id: Ifd7b24966613ca915511a3a607095508068200b8 |
2 years ago |
|
Abseil Team
|
b308bc0651 |
Changes mutex profiling
PiperOrigin-RevId: 471545981 Change-Id: I4d2c8b6d4f1e58976915bda78a77178b8bf80da8 |
2 years ago |
|
Abseil Team
|
751ade00ee |
Fix "unsafe narrowing" warnings in absl, 3/n.
Addresses failures with the following, in some files: -Wshorten-64-to-32 -Wimplicit-int-conversion -Wsign-compare -Wsign-conversion -Wtautological-unsigned-zero-compare (This specific CL focuses on .cc files in dirs n-t, except string.) Bug: chromium:1292951 PiperOrigin-RevId: 465287204 Change-Id: I0fe98ff78bf3c08d86992019eb626755f8b6803e |
2 years ago |
Elijah Conners
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0e0d8054dc
|
fix: properly create the b integer
Signed-off-by: Elijah Conners <business@elijahpepe.com> |
2 years ago |
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Elijah Conners
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68da198e67
|
fix(mutex): safely call snprintf
In the PostSynchEvent() function, the pos integer uses an implementation of snprintf that is fundamentally unsafe: since the return value of snprintf is the number of characters that would have been written to the buffer, if an operation reaches the end of the buffer with more than one character discarded, the return value will be greater than the buffer size, requiring a check of the buffer's current size. Signed-off-by: Elijah Conners <business@elijahpepe.com> |
2 years ago |
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Abseil Team
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aac2279f22 |
absl: fix live-lock in CondVar
CondVar::WaitWithTimeout can live-lock when timeout is racing with Signal/SignalAll and Signal/SignalAll thread is not scheduled due to priorities, affinity or other scheduler artifacts. This could lead to stalls of up to tens of seconds in some cases. PiperOrigin-RevId: 449159670 Change-Id: I64bbd277c1f91964cfba3306ba8a80eeadf85f64 |
3 years ago |
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Abseil Team
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731d4021ae |
Fix typo: "a the condition" -> "a condition".
PiperOrigin-RevId: 443723710 Change-Id: Ic39b0cf2b289efa9cd9434616949dd08a1a35117 |
3 years ago |
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Abseil Team
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04610889a9 |
Export of internal Abseil changes
-- 3fad46c668edd864a62511f2a6875b8b79e38f34 by Evan Brown <ezb@google.com>: Use switches instead of lookup tables for zap_desig_waker and ignore_waiting_writers so that we can avoid dTLB misses. See, e.g., https://godbolt.org/z/a7Gb9vzzj. Also, now that these are functions, follow function style in naming and comments. PiperOrigin-RevId: 418654693 -- ba5107744023a4e9163a44d706fbe8e4a1bc0fd9 by Abseil Team <absl-team@google.com>: Check for Clang before attempting to expand __clang_major__. This avoids a warning about an undefined macro on Windows when compiling with MinGW-GCC. PiperOrigin-RevId: 418287329 GitOrigin-RevId: 3fad46c668edd864a62511f2a6875b8b79e38f34 Change-Id: I28104980c4d3b204537b248447a6bd1022c9ef5d |
3 years ago |
|
Abseil Team
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52d41a9ec2 |
Export of internal Abseil changes
-- 81f95fcf85b75b84f9892c73123501472b9cff33 by Martijn Vels <mvels@google.com>: Introduce GetEstimatedMemoryUsage(CordMemoryAccounting::kFairShare) Memory usage analysis is moved into a separate cord_analysis.cc source. PiperOrigin-RevId: 416370158 -- 6bc7b1348fd27fe53f100c9eabd47f4f2cb9c19c by Abseil Team <absl-team@google.com>: Support scoped enum in absl::Substitute. PiperOrigin-RevId: 416345422 -- 6399f4f6ae05ebcd67664ebd844902f699ab8ec7 by Abseil Team <absl-team@google.com>: Correct the computation of contention cycles Currently, we record contention cycles from the first time a thread started waiting on a mutex. Consider a situation in which two threads, T1 and T2, run a loop at the top of which they acquire a common mutex and release it at the end of the loop body. Further assume that T2 is never able to acquire the mutex as T1 repeatedly acquires and then releases the mutex. In this case, we would expect that the reported contention cycles would be increase linearly over time. But currently we observe a quadratic behavior in the reported waiting time as mentioned in b/14684244#comment10. To fix the issue, this CL records the contention cycles experienced by all the threads woken up when the mutex is released. Further, contention_start_cycles is set to the current time since the contention cycles for the time already passed has been taken into account. With this CL, we get a linear increase in the waiting time, the expected behavior. PiperOrigin-RevId: 416322593 -- 149c1637c8a0f1a38e5a8f9f27e5803a2015a554 by Jorg Brown <jorg@google.com>: Make Status::EmptyString more efficient by constructing it in global space, rather than on the heap. See https://godbolt.org/z/8M9n7YqcY for reduced code size. PiperOrigin-RevId: 416307833 -- 3b4562a8be5a3c80077cb67b0a32c97419058380 by Abseil Team <absl-team@google.com>: Clarify the usage of RegisterMutexProfiler PiperOrigin-RevId: 416146130 GitOrigin-RevId: 81f95fcf85b75b84f9892c73123501472b9cff33 Change-Id: Iccb72d7ee617e6ebe226a38170d62e0849b43480 |
3 years ago |
|
Abseil Team
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1065514ef3 |
Export of internal Abseil changes
--
07240ca7822d007cdcc79f2c40bd58b2c2010348 by Abseil Team <absl-team@google.com>:
Correct the comment from "AlphaNum" to "Arg".
PiperOrigin-RevId: 416139192
--
adcba4a6b3763626e1db7b1e8c108b3114903557 by Martijn Vels <mvels@google.com>:
Fix NewExternalRep() to require data being non-empty, and remove nullptr return.
PiperOrigin-RevId: 416135865
--
c0d14cd918fb16f15d1d84de9284b5c5ecc1f8f2 by Abseil Team <absl-team@google.com>:
Fix doc comment for absl::ascii_isprint().
The comment was incorrectly saying that it includes all whitespace.
It doesn't; the only whitespace char it includes is ' '.
PiperOrigin-RevId: 416112524
--
d83327800159c07002b6865e21232a12463e02dd by Abseil Team <absl-team@google.com>:
Internal change
PiperOrigin-RevId: 416099978
--
baf11e9ca42ca9140cdbf8075f971db8d65b1195 by Ilya Tokar <tokarip@google.com>:
Prevent compiler from optimizing Group_Match* benchmarks away.
Currently we benchmark single store of precomputed value.
Not all affected benchmarks show performance changes:
BM_Group_Match 0.53ns ± 1% 0.53ns ± 0% -0.42% (p=0.038 n=10+10)
BM_Group_MatchEmpty 0.26ns ± 1% 0.26ns ± 1% ~ (p=1.000 n=10+10)
BM_Group_MatchEmptyOrDeleted 0.26ns ± 1% 0.26ns ± 1% ~ (p=0.121 n=10+10)
BM_Group_CountLeadingEmptyOrDeleted 0.26ns ± 1% 0.45ns ± 0% +70.05% (p=0.000 n=10+8)
BM_Group_MatchFirstEmptyOrDeleted 0.26ns ± 0% 0.44ns ± 1% +65.91% (p=0.000 n=8+9)
But inspecting the generated code shows the difference,
e. g. BM_Group_MatchFirstEmptyOrDeleted
Before:
add $0xffffffffffffffff,%rbx
jne 30
After:
pcmpeqd %xmm0,%xmm0
pcmpgtb -0x30(%rbp),%xmm0
pmovmskb %xmm0,%eax
add: 0x23$0xffffffffffffffff,%rbx
jne 40
PiperOrigin-RevId: 416083515
--
122fbff893dc4571b3e75e4b241eb4495b925610 by Abseil Team <absl-team@google.com>:
Put namespace guard in ABSL_DECLARE_FLAG to make declaring a flag in a namespace a compiler error instead of a linker error.
PiperOrigin-RevId: 416036072
--
020fd8a20f5fa319e948846e003391fcb9e03868 by Ilya Tokar <tokarip@google.com>:
Make Cord::InlineRep::set_data unconditionally zero out memory.
Currently there is a single case where we don't zero out memory
as an optimization. Unconditional zeroing doesn't show any changes
in benchmarks, except for the unrelated improvement:
BM_CordPartialCopyToCord/1M/1 12.6ns ± 4% 12.6ns ± 4% ~ (p=0.857 n=16+19)
BM_CordPartialCopyToCord/1M/128 44.9ns ± 7% 45.0ns ± 3% ~ (p=0.468 n=18+17)
BM_CordPartialCopyToCord/1M/1k 64.5ns ± 4% 61.4ns ± 4% -4.82% (p=0.000 n=19+17)
BM_CordPartialCopyToCord/1M/8k 139ns ± 3% 128ns ±15% -7.76% (p=0.009 n=17+20)
BM_CordPartialCopyToCord/1M/16k 193ns ± 6% 168ns ± 6% -13.17% (p=0.000 n=17+17)
BM_CordPartialCopyToCord/4M/16k 199ns ± 4% 177ns ± 4% -11.36% (p=0.000 n=17+18)
BM_CordPartialCopyToCord/4M/32k 275ns ± 3% 250ns ± 4% -9.00% (p=0.000 n=18+18)
BM_CordPartialCopyToCord/4M/64k 291ns ± 4% 266ns ± 5% -8.53% (p=0.000 n=18+16)
BM_CordPartialCopyToCord/4M/128k 322ns ± 5% 291ns ± 4% -9.43% (p=0.000 n=20+18)
BM_CordPartialCopyToCord/8M/32k 281ns ± 5% 251ns ± 4% -10.38% (p=0.000 n=20+16)
BM_CordPartialCopyToCord/8M/64k 293ns ± 6% 267ns ± 4% -8.87% (p=0.000 n=16+19)
BM_CordPartialCopyToCord/8M/128k 334ns ± 3% 305ns ± 2% -8.56% (p=0.000 n=17+16)
This is clearly an alignmnet effect since number of the executed instructions is the same:
M_CordPartialCopyToCord/1M/1 155 ± 0% 155 ± 0% ~ (all samples are equal)
BM_CordPartialCopyToCord/1M/128 446 ± 0% 446 ± 0% ~ (p=0.332 n=36+39)
BM_CordPartialCopyToCord/1M/1k 473 ± 0% 473 ± 0% ~ (p=0.969 n=40+40)
BM_CordPartialCopyToCord/1M/8k 808 ± 0% 808 ± 0% ~ (p=0.127 n=40+39)
BM_CordPartialCopyToCord/1M/16k 957 ± 0% 957 ± 0% ~ (p=0.532 n=40+40)
BM_CordPartialCopyToCord/4M/16k 952 ± 0% 952 ± 0% ~ (p=0.686 n=39+39)
BM_CordPartialCopyToCord/4M/32k 1.12k ± 0% 1.12k ± 0% ~ (p=0.690 n=40+40)
BM_CordPartialCopyToCord/4M/64k 1.23k ± 0% 1.23k ± 0% ~ (p=0.182 n=40+39)
BM_CordPartialCopyToCord/4M/128k 1.44k ± 0% 1.44k ± 0% ~ (p=0.711 n=40+40)
BM_CordPartialCopyToCord/8M/32k 1.12k ± 0% 1.12k ± 0% ~ (p=0.697 n=40+40)
BM_CordPartialCopyToCord/8M/64k 1.23k ± 0% 1.23k ± 0% +0.00% (p=0.049 n=40+40)
BM_CordPartialCopyToCord/8M/128k 1.44k ± 0% 1.44k ± 0% ~ (p=0.507 n=40+40)
This makes code simpler and doesn't regress performance.
PiperOrigin-RevId: 415560574
--
37305b2690b31682088749e4d62f40d7095bdc54 by Derek Mauro <dmauro@google.com>:
Internal change
PiperOrigin-RevId: 415558737
--
86aaed569b9e743c1eb813a5f48def978a793db3 by Martijn Vels <mvels@google.com>:
Internal change
PiperOrigin-RevId: 415515201
--
6cdb8786cdcb4fa0b8a4b72fc98940877d1fdeff by Abseil Team <absl-team@google.com>:
Update SubmitMutexProfileData to accept wait_cycles instead of wait_timestamp
PiperOrigin-RevId: 415360871
--
9f979d307aa16ad09f214e04876cbe84395c0901 by Abseil Team <absl-team@google.com>:
absl::flat_hash_set compiles with -Wconversion -Wsign-compare
PiperOrigin-RevId: 415357498
--
9eceb14174708f15e61259d449b214a8a4c7f9e7 by Abseil Team <absl-team@google.com>:
Fix AddressIsReadable for the corner case of (aligned) addr == NULL.
PiperOrigin-RevId: 415307792
--
1a39ffe55898375e2d7f88c17c99db5a1b95b313 by Martijn Vels <mvels@google.com>:
Internal change
PiperOrigin-RevId: 415162872
--
64378549b110d5f5762185a5906c520fba70f0e7 by Abseil Team <absl-team@google.com>:
Fix a typo in the comments
PiperOrigin-RevId: 415088461
--
41aae8322e913b82710153c22b97c611fdb6e1fb by Abseil Team <absl-team@google.com>:
Switch from `connect` to `rt_sigreturn` -- the latter is much less problematic
for system call sandboxes.
PiperOrigin-RevId: 415073965
--
870c5e3388b6a35611bff538626fe7a1c8c87171 by Abseil Team <absl-team@google.com>:
Add ABSL_HAVE_HWADDRESS_SANITIZER and ABSL_HAVE_LEAK_SANITIZER
PiperOrigin-RevId: 414871189
--
f213ed60a66b58da7ac40555adfb1d529ff0a4db by Derek Mauro <dmauro@google.com>:
Remove reference to __SANITIZE_MEMORY__, which does not exist
It appears to have been copied by pattern matching from the ASAN/TSAN
code blocks.
|
3 years ago |
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Abseil Team
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2e9532cc6c |
Export of internal Abseil changes
-- 5ed5dc9e17c66c298ee31cefc941a46348d8ad34 by Abseil Team <absl-team@google.com>: Fix typo. PiperOrigin-RevId: 362040582 -- ac704b53a49becc42f77e4529d3952f8e7d18ce4 by Abseil Team <absl-team@google.com>: Fix a typo in a comment. PiperOrigin-RevId: 361576641 -- d20ccb27b7e9b53481e9192c1aae5202c06bfcb1 by Derek Mauro <dmauro@google.com>: Remove the inline keyword from functions that aren't defined in the header. This may fix #910. PiperOrigin-RevId: 361551300 -- aed9ae1dffa7b228dcb6ffbeb2fe06a13970c72b by Laramie Leavitt <lar@google.com>: Propagate nice/strict/naggy state on absl::MockingBitGen. Allowing NiceMocks reduces the log spam for un-mocked calls, and it enables nicer setup with ON_CALL, so it is desirable to support it in absl::MockingBitGen. Internally, gmock tracks object "strictness" levels using an internal API; in order to achieve the same results we detect when the MockingBitGen is wrapped in a Nice/Naggy/Strict and wrap the internal implementation MockFunction in the same type. This is achieved by providing overloads to the Call() function, and passing the mock object type down into it's own RegisterMock call, where a compile-time check verifies the state and creates the appropriate mock function. PiperOrigin-RevId: 361233484 -- 96186023fabd13d01d32d60d9c7ac4ead1aeb989 by Abseil Team <absl-team@google.com>: Ensure that trivial types are passed by value rather than reference PiperOrigin-RevId: 361217450 -- e1135944835d27f77e8119b8166d8fb6aa25f906 by Evan Brown <ezb@google.com>: Internal change. PiperOrigin-RevId: 361215882 -- 583fe6c94c1c2ef757ef6e78292a15fbe4030e35 by Evan Brown <ezb@google.com>: Increase the minimum number of slots per node from 3 to 4. We also rename kNodeValues (and related names) to kNodeSlots to make it clear that they are about the number of slots per node rather than the number of values per node - kMinNodeValues keeps the same name because it's actually about the number of values rather than the number of slots. Motivation: I think the expected number of values per node, assuming random insertion order, is the average of the maximum and minimum numbers of values per node (kNodeSlots and kMinNodeValues). For large and/or even kNodeSlots, this is ~75% of kNodeSlots, but for kNodeSlots=3, this is ~67% of kNodeSlots. kMinNodeValues (which corresponds to worst-case occupancy) is ~33% of kNodeSlots, when kNodeSlots=3, compared to 50% for even kNodeSlots. This results in higher memory overhead per value, and since this case (kNodeSlots=3) is used when values are large, it seems worth fixing. PiperOrigin-RevId: 361171495 GitOrigin-RevId: 5ed5dc9e17c66c298ee31cefc941a46348d8ad34 Change-Id: I8e33b5df1f987a77112093821085c410185ab51a |
4 years ago |
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Abseil Team
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0b5af594fc |
Export of internal Abseil changes
-- 1a5831c2b4b85e0151b7952e47f4b80827937620 by Laramie Leavitt <lar@google.com>: Implement FuzzingBitGen, an adapter which allows existing randomized tests which use absl::BitGenRef to easily integrate with fuzz testing. I found myself implementing a similar option in our tensorstore project to fuzz test a storage layer and figured that it would be more useful as a common tool with defaults that take the non-random path. This is similar to the FuzzedDataProvider mechanism which generates random values from a fuzz string, and is used to generate fuzz test inputs, and internally it uses FuzzedDataProvider. The basic technique used here is to construct mocking lambdas for all of the absl mock distribution configurations, and forwarding the parameters to fuzzing-specific implementations that call into FuzzedDataProvider. The default paths for the distributions are either the bounds or a median value. PiperOrigin-RevId: 358432715 -- e7968538c5ef5cd0b9822dbeac0f659b5e7d49b3 by Derek Mauro <dmauro@google.com>: Give extern C symbols a unique name when the inline namespace is given. This partially addresses #851 PiperOrigin-RevId: 358403842 GitOrigin-RevId: 1a5831c2b4b85e0151b7952e47f4b80827937620 Change-Id: Id5ca0251498e390a8efa7210a17cc2cabb2c7dd8 |
4 years ago |
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Abseil Team
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322ae2420d |
Export of internal Abseil changes
-- 1609589925459c2c0b2a17912c0d65227f709db9 by Abseil Team <absl-team@google.com>: Clarify the "Potential Mutex deadlock" reason message. PiperOrigin-RevId: 351367862 -- 88bf28863db2c2d2d48767c3e4dfab6a48bdff79 by Abseil Team <absl-team@google.com>: Print CPU number is fault handler. This CL adds code to print CPU number inside the fault handler. This is only supported on Linux. The CPU number is also a hint only. There is no guarantee that it is indeed the CPU on which a fault happened. PiperOrigin-RevId: 351238373 -- 66a9c8e44b5744fec1ca0d7b8db7e1d50772d9a2 by Samuel Benzaquen <sbenza@google.com>: Add better error message for ODR violations of flags. PiperOrigin-RevId: 351197423 -- 6efd1efb341563148dd43255aaa4bf959dfd9554 by Chris Kennelly <ckennelly@google.com>: Assume bitwise builtins are available on GCC. These are long-standing builtins but are not consistently detected by ABSL_HAVE_BUILTIN. PiperOrigin-RevId: 350814036 GitOrigin-RevId: 1609589925459c2c0b2a17912c0d65227f709db9 Change-Id: Ied3fd2f135187f2c316b403fba45f3bbaea54138 |
4 years ago |
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Abseil Team
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62ce712ecc |
Export of internal Abseil changes
-- b927776da818c674a674e46a7bbbdd54170a0ad3 by Todd Lipcon <tlipcon@google.com>: Include priority in the calculation of mutex waiter equivalence This changes the behavior of the absl::Mutex wait list to take into account waiter priority when creating "skip chains". A skip chain on the wait list is a set of adjacent waiters that share some property and enable skipping during traversal. Prior to this CL, the skip chains were formed of waiters with the same wait type (e.g. exclusive vs read) and Condition. With this CL, the priority is also taken into account. This avoids O(n) behavior when enqueueing a waiter onto a wait list where the oldest waiter is at a lower priority than the waiter to be enqueued. With the prior notion of equivalence class, a skip chain could contain waiters of different priority, so we had to walk the linked list one-by-one until finding the appropriate insertion point. With the new equivalence class computation, we can skip past all of the equivalent waiters to find the right insertion point. This gives a substantial improvement to the enqueue performance in the case where there's already a waiter at lower priority. Note that even though this code path isn't a hot one, it's performed while holding the Mutex's spinlock, which prevents other threads from unlocking the Mutex, so minimizing the time under the critical section can have "knock-on" throughput benefits. Notable performance differences: name old cpu/op new cpu/op delta BM_MutexEnqueue/multiple_priorities:0/threads:4 8.60µs ± 7% 8.69µs ± 6% ~ (p=0.365 n=19+20) BM_MutexEnqueue/multiple_priorities:0/threads:64 8.47µs ± 5% 8.64µs ±10% ~ (p=0.569 n=19+20) BM_MutexEnqueue/multiple_priorities:0/threads:128 8.56µs ± 3% 8.55µs ± 6% ~ (p=0.563 n=17+17) BM_MutexEnqueue/multiple_priorities:0/threads:512 8.98µs ± 8% 8.86µs ± 4% ~ (p=0.232 n=19+17) BM_MutexEnqueue/multiple_priorities:1/threads:4 6.64µs ±10% 6.45µs ± 4% ~ (p=0.097 n=20+17) BM_MutexEnqueue/multiple_priorities:1/threads:64 15.2µs ± 8% 9.1µs ± 4% -39.93% (p=0.000 n=20+17) BM_MutexEnqueue/multiple_priorities:1/threads:128 22.3µs ± 6% 9.4µs ± 4% -57.82% (p=0.000 n=20+17) BM_MutexEnqueue/multiple_priorities:1/threads:512 61.5µs ± 3% 10.1µs ± 8% -83.53% (p=0.000 n=20+20) name old time/op new time/op delta BM_Mutex/real_time/threads:1 19.6ns ± 4% 19.8ns ±11% ~ (p=0.534 n=17+17) BM_Mutex/real_time/threads:112 120ns ±17% 122ns ±14% ~ (p=0.988 n=20+18) BM_MutexEnqueue/multiple_priorities:0/threads:4 5.18µs ± 6% 5.23µs ± 6% ~ (p=0.428 n=19+20) BM_MutexEnqueue/multiple_priorities:0/threads:64 5.06µs ± 5% 5.18µs ±10% ~ (p=0.235 n=19+20) BM_MutexEnqueue/multiple_priorities:0/threads:128 5.16µs ± 3% 5.14µs ± 6% ~ (p=0.474 n=17+17) BM_MutexEnqueue/multiple_priorities:0/threads:512 5.40µs ± 8% 5.32µs ± 5% ~ (p=0.196 n=20+18) BM_MutexEnqueue/multiple_priorities:1/threads:4 3.99µs ±10% 3.88µs ± 3% ~ (p=0.074 n=20+17) BM_MutexEnqueue/multiple_priorities:1/threads:64 8.48µs ± 9% 5.41µs ± 3% -36.20% (p=0.000 n=20+16) BM_MutexEnqueue/multiple_priorities:1/threads:128 12.2µs ± 6% 5.6µs ± 4% -54.43% (p=0.000 n=20+17) BM_MutexEnqueue/multiple_priorities:1/threads:512 32.1µs ± 3% 5.9µs ± 8% -81.45% (p=0.000 n=20+20) ... BM_Contended<absl::Mutex>/cs_ns:2000/num_prios:2/real_time/threads:32 1.69µs ± 4% 1.66µs ± 2% -1.91% (p=0.000 n=20+20) BM_Contended<absl::Mutex>/cs_ns:2000/num_prios:2/real_time/threads:48 1.90µs ± 2% 1.82µs ± 2% -4.09% (p=0.000 n=20+19) BM_Contended<absl::Mutex>/cs_ns:2000/num_prios:2/real_time/threads:64 2.19µs ± 2% 1.80µs ± 1% -17.89% (p=0.000 n=20+20) BM_Contended<absl::Mutex>/cs_ns:2000/num_prios:2/real_time/threads:96 2.18µs ± 5% 1.81µs ± 1% -16.94% (p=0.000 n=17+19) BM_Contended<absl::Mutex>/cs_ns:2000/num_prios:2/real_time/threads:128 2.18µs ± 1% 1.91µs ± 2% -12.33% (p=0.000 n=19+20) BM_Contended<absl::Mutex>/cs_ns:2000/num_prios:2/real_time/threads:192 2.27µs ± 2% 1.89µs ± 1% -16.79% (p=0.000 n=20+19) BM_Contended<absl::Mutex>/cs_ns:2000/num_prios:2/real_time/threads:256 2.36µs ± 2% 1.83µs ± 1% -22.25% (p=0.000 n=20+19) PiperOrigin-RevId: 350775432 -- e7812590e5dbd75d21e2e8762713bd04c0353ef6 by Todd Lipcon <tlipcon@google.com>: Fix test timeouts for sequence_lock_test on TSAN PiperOrigin-RevId: 350680903 -- 3090d8154d875f3eabce48876321ae8d6a197302 by Todd Lipcon <tlipcon@google.com>: Add benchmarks for Mutex performance with multiple priorities This adds a new benchmark to mutex_benchmark which forces threads to go through the slow "Enqueue" path. The benchmark runs with varying numbers of threads and with/without the presence of a lower-priority waiter. PiperOrigin-RevId: 350655403 GitOrigin-RevId: b927776da818c674a674e46a7bbbdd54170a0ad3 Change-Id: If739e5e205f0d3867661a52466b8f64e7e033b22 |
4 years ago |
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Abseil Team
|
bb7fb2c7bf |
Export of internal Abseil changes
-- 4e789887c5e2d3e531499c6c761a10bf60272969 by Abseil Team <absl-team@google.com>: Remove a branch from MutexDelay. Store the mutex sleep limit in the static so that it's not calculated every time. Remove num_cpus from the static data because it's not used anymore. The size of static data is 2 QWORDS after this change. PiperOrigin-RevId: 350069849 GitOrigin-RevId: 4e789887c5e2d3e531499c6c761a10bf60272969 Change-Id: Ic374c63c8a7011b5f8931459e44a7841d4b2a2e6 |
4 years ago |
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Abseil Team
|
f3f785ab59 |
Export of internal Abseil changes
-- 5bd06440e700fefd6eadd577d7d69c51f15c63e0 by Abseil Team <absl-team@google.com>: Add if-guard to futex.h so that it doesn't fail to parse for unsupported platforms PiperOrigin-RevId: 336880375 -- 8b3d3bb4ad123fc9f648f0e397b2eddd88dc0c02 by Derek Mauro <dmauro@google.com>: Fix race in AddressIsReadable file descriptors using stronger memory ordering PiperOrigin-RevId: 336874423 -- 1d8bf23747009cca29129b80c2793bc91443dd55 by Derek Mauro <dmauro@google.com>: Avoid -Wundef warnings on ABSL_HAVE_THREAD_LOCAL PiperOrigin-RevId: 336792406 -- 562a480f029c600c1d3b1428da6a9b09e8952a74 by Derek Mauro <dmauro@google.com>: Fix preprocessor condition for symbols __tsan_mutex_read_lock and __tsan_mutex_try_lock PiperOrigin-RevId: 336732571 GitOrigin-RevId: 5bd06440e700fefd6eadd577d7d69c51f15c63e0 Change-Id: Id9bb331baec74b9d80c7b228959a7739bc30e694 |
4 years ago |
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Abseil Team
|
4b2fbb4adb |
Export of internal Abseil changes
-- a5af5874c1c5cc02bd2a748d455321f82b6f2a93 by Andy Getzendanner <durandal@google.com>: fix compile fails with asan and -Wredundant-decls Import of https://github.com/abseil/abseil-cpp/pull/801 PiperOrigin-RevId: 336693223 -- ed9df42ab2b742386c6692c2bed015374c919d9c by Derek Mauro <dmauro@google.com>: Fix integer conversion warning Fixes #814 PiperOrigin-RevId: 336651814 -- 0ab4c23884e72dce17b67c1eb520f9dbb802565d by Derek Mauro <dmauro@google.com>: Internal change PiperOrigin-RevId: 336585378 -- eba0e3dccd52a6e91bcff84075bef0affc650b74 by Matt Kulukundis <kfm@google.com>: Add bitset operations to Futex helper. PiperOrigin-RevId: 336409368 -- 8b0709a8b4500bf5f0af4b602d76a298d81645e8 by Abseil Team <absl-team@google.com>: Fix code indentation in a comment. PiperOrigin-RevId: 336368167 -- bc3961c87a7e7760c10319a5b0349c279f7ae3ad by Samuel Benzaquen <sbenza@google.com>: Improve performance of the registry: - Reduce contention - Reduce memory usage for each flag by `6*sizeof(void*)`. - Replace one immortal allocation per-flag with a single one for all the flags - Slightly improve single-threaded performance by avoiding the std::map indirections. PiperOrigin-RevId: 336365904 -- 264ad9f28f935aad8b6b1437f8bf804fa9104346 by Abseil Team <absl-team@google.com>: Fix typo in comment on absl::Condition. PiperOrigin-RevId: 336311680 -- b5b808a8c75ca0df7b09eff9a423ec171d80f771 by Derek Mauro <dmauro@google.com>: Add missing Apache license headers PiperOrigin-RevId: 336294980 -- 89446c3a4793df8b95060385cf3e219357c3db1d by Andy Soffer <asoffer@google.com>: Internal changes PiperOrigin-RevId: 336287465 -- 57c8be4e294881bc79a6a44b8e4bf7ecbb19b9b9 by Matt Kulukundis <kfm@google.com>: Extract Futex from an implementation detail of Wait to a private interface. PiperOrigin-RevId: 336123209 GitOrigin-RevId: a5af5874c1c5cc02bd2a748d455321f82b6f2a93 Change-Id: Ie5a0ebe28e571814e3e11d4c05ca308523ccf311 |
4 years ago |
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Abseil Team
|
184cf25241 |
Export of internal Abseil changes
-- 587e6db882749fa7faa12815e614afab04d218b9 by Derek Mauro <dmauro@google.com>: Use attribute detection for other sanitizer related attributes PiperOrigin-RevId: 324077073 -- 3ee55e4935b4235516b1fcac3c55945e510f7afc by Evan Brown <ezb@google.com>: Simplify CordRepExternal allocation/deallocation. I think this can save some memory when `Releaser` is empty and when on platforms where alignof(CordRepExternal) < (default `::operator new` alignment). We no longer need the API requirement that alignof(Releaser) <= (default `::operator new` alignment). Also remove another static_assert from a TODO in cord_internal.h and fix some warnings about calling std::move on a forwarding reference. PiperOrigin-RevId: 324053720 -- 9fc78436565eb3b204d4aa425ee3773354392f45 by Derek Mauro <dmauro@google.com>: Use auto-detected sanitizer attributes for ASAN, MSAN, and TSAN builds PiperOrigin-RevId: 323831461 GitOrigin-RevId: 587e6db882749fa7faa12815e614afab04d218b9 Change-Id: Ie0e4a2846d7f66988a2d81a5e50721b62fdb3d6d |
4 years ago |
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Abseil Team
|
55c04eb920 |
Export of internal Abseil changes
-- 69b3ab092ee0fef3d27f589e709280c341f006c6 by Greg Falcon <gfalcon@google.com>: Import of CCTZ from GitHub. PiperOrigin-RevId: 321005878 -- 3a4038cd0cea6455453a7ae82f2de7e91d7e2bc1 by Abseil Team <absl-team@google.com>: Google-internal changes only. PiperOrigin-RevId: 320994821 -- f9d9a93782924df6ffc351a271c239ca4bdff3c8 by Derek Mauro <dmauro@google.com>: Update Linux latest toolchains, most notably to GCC 10.1 This create a new "hybrid" docker image that includes the latest versions of both GCC and LLVM. Since the LLVM build targets Debian 10, but Debian 10 uses an older version of libstdc++ that doesn't have full C++20 support, the easiest solution is to use the GCC/Debian 10 base image from DockerHub and copy LLVM into it. This also includes fixes to get the build working with the new toolchains. PiperOrigin-RevId: 320991795 -- 43129cd66dc4439b36d85030800a3929f20d9f86 by Abseil Team <absl-team@google.com>: Rollback import of CCTZ from GitHub (breaks MSAN tests) - e87b391f0d10ae9c3d2e70e4a3633337d2c5e643 handle "slim" TZif files in TimeZoneInfo::ExtendTransitio... by Bradley White <14679271+devbww@users.noreply.github.com> PiperOrigin-RevId: 320978767 -- 2a343a55f297d433c1521920f0bd20ddd2dc71e8 by Derek Mauro <dmauro@google.com>: Use ABSL_HAVE_ATTRIBUTE in thread_annotations.h PiperOrigin-RevId: 320956378 -- f6f3e8333c9ef6e6441586be6587bbfb1c8c8127 by Gennadiy Rozental <rogeeff@google.com>: Import of CCTZ from GitHub. PiperOrigin-RevId: 320952592 -- 3cc2bcce3533ac1233c0536232b07eea45fe8ed0 by Derek Mauro <dmauro@google.com>: Internal change PiperOrigin-RevId: 320862698 -- 4e22066476744609e42c475b55e3cbd874f04c39 by Gennadiy Rozental <rogeeff@google.com>: Internal change PiperOrigin-RevId: 320461277 GitOrigin-RevId: 69b3ab092ee0fef3d27f589e709280c341f006c6 Change-Id: I36f547711e7078d52f2e0a1ff3f4c903056a2b9e |
4 years ago |
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Abseil Team
|
81f34df834 |
Export of internal Abseil changes
-- 739f9fb80212c21c015fec473e9e29803a156ef9 by Derek Mauro <dmauro@google.com>: Define FlagStateInterface::~FlagStateInterface() in the translation unit in which it is actually declared Fixes #717 PiperOrigin-RevId: 319083605 -- 913ef1f23113268b22d636d3ae3b992862efdb1a by Derek Mauro <dmauro@google.com>: Fix ABSL_LOCK_RETURNED statement PiperOrigin-RevId: 319078667 -- a43b1413da1770d638147c73e7e1693cfaf869c7 by Derek Mauro <dmauro@google.com>: Fix redeclaration ‘absl::Cord::InlineRep::kMaxInline’, which differs in ‘constexpr’ Fixes #725 PiperOrigin-RevId: 319060910 -- 1ad7d491a80f6c9de78a6fc20f09b7765d224503 by Abseil Team <absl-team@google.com>: Make absl SpinLock trivially destructible when possible PiperOrigin-RevId: 319049456 -- 659ecad3578dfa669854a82279fa590002bdb37f by Derek Mauro <dmauro@google.com>: Remove the static initialization of global variables used by absl::Mutex as requested by Chromium PiperOrigin-RevId: 319031204 -- 609c491d8bb4f8bb3b44c5a4c0bee51c583df24c by Abseil Team <absl-team@google.com>: Add implementation of %a and %A to absl::StrFormat. Prior to this it just fell back to sprintf. PiperOrigin-RevId: 318888039 -- 5e8ae6392bcd135248aac14c4b9f2a5116868678 by Abseil Team <absl-team@google.com>: Google-internal changes only. PiperOrigin-RevId: 318857077 -- 4a2578e33e8442954e29e5f0380ddfcf0f033f0d by Greg Falcon <gfalcon@google.com>: Change of enum constants to accommodate internal change. PiperOrigin-RevId: 318844716 -- 4b578b102816260c213675759f4c15911735578a by Abseil Team <absl-team@google.com>: Internal change PiperOrigin-RevId: 318704453 -- 0ee82fd24d548b260c9229fa1f54571dae1dfa24 by Gennadiy Rozental <rogeeff@google.com>: Allow lookup of retired flags. At the moment we issue warning on attempt to find a retired flag. This way we can't even check if flag is retired without issuing the warning. With this change we will only issue the warning if one tries to access any functionality of retired flag but it's name "is retired" status, and type. PiperOrigin-RevId: 318605017 -- 3e35fe9b4c79f636fa328c59e2aabb93e29b7c99 by Abseil Team <absl-team@google.com>: Fix error return from InstallSymbolDecorator(). PiperOrigin-RevId: 318490405 -- ae46063f3eb2998cb961f62a359d932e5908a4bc by Abseil Team <absl-team@google.com>: Do not make copies of iterated collection elements into the loop variable. PiperOrigin-RevId: 318423139 -- d06a075a12aab5f6ab98474677ce50d588b21de3 by Abseil Team <absl-team@google.com>: add missing word making the error code better English PiperOrigin-RevId: 318335052 GitOrigin-RevId: 739f9fb80212c21c015fec473e9e29803a156ef9 Change-Id: Id77a0a4b1959036b00555deef40e82d51884fbc1 |
4 years ago |
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Abseil Team
|
b86fff162e |
Export of internal Abseil changes
-- 517dc7eba9878290fc93c6523dc6d6e2c49b8c1e by Abseil Team <absl-team@google.com>: Handle 'nan' in HumanReadableInt::ToInt64. PiperOrigin-RevId: 318121226 -- 4fa6103b46dbc1375d416810dba591ab4f4898d1 by Abseil Team <absl-team@google.com>: Promote `float`s to `double`s before formatting. This will bring StrFormat behavior more in line with that of sprintf. PiperOrigin-RevId: 318091841 -- e4083a4b64b077d8520ccd8e0ca90da24f4ea24d by Abseil Team <absl-team@google.com>: Google-internal changes only. PiperOrigin-RevId: 318069900 -- ab24f60127db089bccaf5fb7d2d1967c76f34768 by Greg Falcon <gfalcon@google.com>: Inclusive language fix: Stop using blacklist/whitelist terminology in Abseil. PiperOrigin-RevId: 317925379 -- 52b56a27a773ea7c10ea8fd456ed606b9d778947 by Abseil Team <absl-team@google.com>: Add test for floats and label tests for double properly. PiperOrigin-RevId: 317916380 -- 0f405960ab5b34d673244fda8bb9141c8f5c1a4f by Abseil Team <absl-team@google.com>: Remove the static initialization of global variables used by absl::Mutex as requested by Chromium PiperOrigin-RevId: 317911430 -- ce8cb49d8f4f68950fd111682657ba57d5a09ca0 by Abseil Team <absl-team@google.com>: Internal Change PiperOrigin-RevId: 317864956 -- a781948e09fb8406d21a494b2fa4f78edaf9c2ea by Abseil Team <absl-team@google.com>: Swap ABSL_DLL / ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES order to fix clang-cl builds. PiperOrigin-RevId: 317858053 -- 4ba197f0dd2cbf8f9b96cebffd878c8847d6ce8d by Gennadiy Rozental <rogeeff@google.com>: Migrate use of annotation macros to ABSL namespaced names PiperOrigin-RevId: 317792057 GitOrigin-RevId: 517dc7eba9878290fc93c6523dc6d6e2c49b8c1e Change-Id: I1a0c04d01adbdc5106b68fd69c97c31f822e11dc |
4 years ago |
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Abseil Team
|
10cb35e459 |
Export of internal Abseil changes
-- b548087c24ae7c2c709e8040a118b5e312d18e2e by Derek Mauro <dmauro@google.com>: Remove the static initialization of global variables used by absl::Mutex as requested by Chromium PiperOrigin-RevId: 317676541 -- f198f5da1e966772efa978ba019bd23576899794 by Greg Miller <jgm@google.com>: fix: work around gcc-4.8 bug in disjunction See https://godbolt.org/z/i7-AmM for a repro of the bug. I realize that Abseil no longer supports gcc 4.8 officially (https://abseil.io/docs/cpp/platforms/platforms), but Cloud C++ still supports gcc 4.8 officially, and so it would be nice to get this simple fix in. fixes https://github.com/abseil/abseil-cpp/issues/718 PiperOrigin-RevId: 317484459 -- ed233f646530c6c0948213b643cc6919db1bee90 by Chris Kennelly <ckennelly@google.com>: Avoid determining the size of the duration unit at runtime. PiperOrigin-RevId: 317376300 -- 73d4011c17fcf747a990176924a7adc69d443533 by Greg Falcon <gfalcon@google.com>: Change spelling of internal detail from `Invoke`/`InvokeT` to `invoke`/`invoke_result_t`. This matches the spelling of the C++17 standard library names that perform the same operations. PiperOrigin-RevId: 317311527 GitOrigin-RevId: b548087c24ae7c2c709e8040a118b5e312d18e2e Change-Id: I131809ff0b92cfdb0d96dc94e94d9c6f751cb0ac |
5 years ago |
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Abseil Team
|
2eba343b51 |
Export of internal Abseil changes
-- baf626d27ff1547776745f3b601cc42f703d4bdf by Greg Falcon <gfalcon@google.com>: Import of CCTZ from GitHub. PiperOrigin-RevId: 315486679 -- 39d4e7f9214c5a74e4ee4b8a7f4af26479925029 by Gennadiy Rozental <rogeeff@google.com>: Avoid order dependant test cases. PiperOrigin-RevId: 315327948 -- 8feb187703a28bb0c5cfc5dd6091e3faa90a8e61 by Gennadiy Rozental <rogeeff@google.com>: Avoid order dependant test cases. PiperOrigin-RevId: 315317018 -- cffd8fddad15908ec9de7f21f65b20528972e3fa by Gennadiy Rozental <rogeeff@google.com>: Avoid order dependant test cases. PiperOrigin-RevId: 315311587 -- 48997a0ceb231b75c14eb4b1eb3b66af69e49f42 by Tom Manshreck <shreck@google.com>: Nit: remove extra "the" PiperOrigin-RevId: 314959763 -- 9516f44a4b5d3055427c95e80c8c04a6321e4221 by Gennadiy Rozental <rogeeff@google.com>: Import of CCTZ from GitHub. PiperOrigin-RevId: 314925147 -- 4f8691d74a4eb42ed03ef29c9588a01b78829941 by Abseil Team <absl-team@google.com>: Uninclude util/bits/bits.h PiperOrigin-RevId: 314858384 -- 02b42a8ec5e5561b29b4e5f93cc1482c3c72ef2d by Abseil Team <absl-team@google.com>: Google-internal changes only. PiperOrigin-RevId: 314855667 -- 146013d69dabafbe2030e23ced7b741d9e8d417c by Gennadiy Rozental <rogeeff@google.com>: Uninclude util/bits/bits.h PiperOrigin-RevId: 314838927 GitOrigin-RevId: baf626d27ff1547776745f3b601cc42f703d4bdf Change-Id: I2602286fb13cf35a88bdd80fe0b44974d4388d46 |
5 years ago |
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Abseil Team
|
a8b03d90e0 |
Export of internal Abseil changes
-- 5b9d5ce21074c0541432555d383d1b9c5898b553 by Gennadiy Rozental <rogeeff@google.com>: Convert FlagSaver into public API PiperOrigin-RevId: 314799739 -- 5f796c9862b1177f161f4b10fe1a84698ebbb5cf by Abseil Team <absl-team@google.com>: Google-internal changes only. PiperOrigin-RevId: 314786474 -- 67f2ae0ac5ae73bcd9d57a058ac4fea8fc1243ba by Gennadiy Rozental <rogeeff@google.com>: Makes sure stacktrace_generic is only used with glibc. Fixes #701 PiperOrigin-RevId: 314726944 -- efb1ef3636b0698b79d3ee3590f12c4dff32a3cb by Samuel Benzaquen <sbenza@google.com>: Take the bits into account when reserving the space for the operation, not just the exponent. PiperOrigin-RevId: 314622744 GitOrigin-RevId: 5b9d5ce21074c0541432555d383d1b9c5898b553 Change-Id: I080a5e333e2dc1545b5aa0417882f7ac7116a20c |
5 years ago |
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Abseil Team
|
768eb2ca28 |
Export of internal Abseil changes
-- f012012ef78234a6a4585321b67d7b7c92ebc266 by Laramie Leavitt <lar@google.com>: Slight restructuring of absl/random/internal randen implementation. Convert round-keys.inc into randen_round_keys.cc file. Consistently use a 128-bit pointer type for internal method parameters. This allows simpler pointer arithmetic in C++ & permits removal of some constants and casts. Remove some redundancy in comments & constexpr variables. Specifically, all references to Randen algorithm parameters use RandenTraits; duplication in RandenSlow removed. PiperOrigin-RevId: 312190313 -- dc8b42e054046741e9ed65335bfdface997c6063 by Abseil Team <absl-team@google.com>: Internal change. PiperOrigin-RevId: 312167304 -- f13d248fafaf206492c1362c3574031aea3abaf7 by Matthew Brown <matthewbr@google.com>: Cleanup StrFormat extensions a little. PiperOrigin-RevId: 312166336 -- 9d9117589667afe2332bb7ad42bc967ca7c54502 by Derek Mauro <dmauro@google.com>: Internal change PiperOrigin-RevId: 312105213 -- 9a12b9b3aa0e59b8ee6cf9408ed0029045543a9b by Abseil Team <absl-team@google.com>: Complete IGNORE_TYPE macro renaming. PiperOrigin-RevId: 311999699 -- 64756f20d61021d999bd0d4c15e9ad3857382f57 by Gennadiy Rozental <rogeeff@google.com>: Switch to fixed bytes specific default value. This fixes the Abseil Flags for big endian platforms. PiperOrigin-RevId: 311844448 -- bdbe6b5b29791dbc3816ada1828458b3010ff1e9 by Laramie Leavitt <lar@google.com>: Change many distribution tests to use pcg_engine as a deterministic source of entropy. It's reasonable to test that the BitGen itself has good entropy, however when testing the cross product of all random distributions x all the architecture variations x all submitted changes results in a large number of tests. In order to account for these failures while still using good entropy requires that our allowed sigma need to account for all of these independent tests. Our current sigma values are too restrictive, and we see a lot of failures, so we have to either relax the sigma values or convert some of the statistical tests to use deterministic values. This changelist does the latter. PiperOrigin-RevId: 311840096 GitOrigin-RevId: f012012ef78234a6a4585321b67d7b7c92ebc266 Change-Id: Ic84886f38ff30d7d72c126e9b63c9a61eb729a1a |
5 years ago |