Date: Tue, 21 Mar 2017 13:55:21 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-virtualization@FreeBSD.org Subject: [Bug 216759] [kern] Memory speed with small blocks (1K) up to 35 times slower than host system (under QEMU emulation, but not only) Message-ID: <bug-216759-27103-01cHSRymqL@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-216759-27103@https.bugs.freebsd.org/bugzilla/> References: <bug-216759-27103@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D216759 --- Comment #16 from deJong <hellrider8881@yahoo.com> --- I have tested the patch set and unfortunately it made no difference root@testbsd11:~ # sysctl kern.timecounter.choice kern.timecounter.choice: TSC-low(-100) i8254(0) ACPI-fast(900) HPET(950) dummy(-1000000) root@testbsd11:~ # sysbench --num-threads=3D1 --test=3Dmemory --memory-total-size=3D1G --memory-block-size=3D1K run sysbench 0.4.12: multi-threaded system evaluation benchmark Running the test with following options: Number of threads: 1 Doing memory operations speed test Memory block size: 1K Memory transfer size: 1024M Memory operations type: write Memory scope type: global Threads started! Done. Operations performed: 1048576 (34976.80 ops/sec) 1024.00 MB transferred (34.16 MB/sec) Test execution summary: total time: 29.9792s total number of events: 1048576 total time taken by event execution: 21.9685 per-request statistics: min: 0.02ms avg: 0.02ms max: 22.21ms approx. 95 percentile: 0.01ms Threads fairness: events (avg/stddev): 1048576.0000/0.00 execution time (avg/stddev): 21.9685/0.00 So either the problem is somewhere else or these patches does not apply to = this situation, it would be good if someone can confirm or deny this. --=20 You are receiving this mail because: You are the assignee for the bug.=
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