Date: Fri, 07 Apr 2017 07:56:25 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-amd64@FreeBSD.org Subject: [Bug 217138] head (e.g.) -r315870 for arm64: sh vs. jemalloc asserts: include/jemalloc/internal/tsd.h:687: Failed assertion: "tsd_booted" once swapped in after being swapped out (comment 10) Message-ID: <bug-217138-6-572z0zrFOI@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-217138-6@https.bugs.freebsd.org/bugzilla/> References: <bug-217138-6@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D217138 --- Comment #35 from Mark Millard <markmi@dsl-only.net> --- I've found that for the "Source for allowing" attachment I can make variations that change how much of the allocated region prefix ends up zero vs. stays good. I vary the sleep time between testing the initialized allocations and doing the fork. The longer the sleep the more zero pages show up: # diff swap_testing[56].c=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20 =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20 1c1 < // swap_testing5.c --- > // swap_testing6.c 5c5 < // cc -g -std=3Dc11 -Wpedantic -o swaptesting5 swap_testing5.c --- > // cc -g -std=3Dc11 -Wpedantic -o swaptesting5 swap_testing6.c 33c33 < sleep(30); // Potentialy force swap-out here. --- > sleep(150); // Potentialy force swap-out here. 37a38,48 > // For no-swap-out here cases: > // > // The longer the sleep here the more allocations > // that end up as zero. > // > // top's Mem Active, Inact, Wired, Bug, Free and > // Swap Total, Used, and Free stay unchanged. > // What does change is the process RES decreases > // while the process SIZE and SWAP stay unchanged > // during this sleep. >=20 NOTE: On other architectures that I've tried (such as armv6/v7) RES does not decrease during the sleep --and the problem does not happen even for as long of sleeps as I've tried. (I use "stress -m 2 --vm-bytes 900M" on armv6/v7 instead of -m 1 --vm-bytes 1800M because that large in one process is not allowed.) So watching top's RES during the sleep (longer than a few seconds) predicts the later fails-vs.-not status: If RES decreases (while other things associated with the process status stay the same) then there will be a failure. --=20 You are receiving this mail because: You are on the CC list for the bug.=
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