https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=216759
--- Comment #24 from rai...@ultra-secure.de --- I still have very slow IO in FreeBSD 13.0 amd64 on KVM. Even with this kvmclock driver (compile from ports as of today). Host: ii qemu-system-x86 1:2.11+dfsg-1ubuntu7.23 amd64 QEMU full system emulation binaries (x86) Linux ewos1-com17-prod 5.8.0-48-generic #54~20.04.1-Ubuntu SMP Sat Mar 20 13:40:25 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux Guest: (freebsd <tests>) 0 # uname -a FreeBSD freebsd 13.0-RELEASE-p1 FreeBSD 13.0-RELEASE-p1 #0: Wed May 26 22:15:09 UTC 2021 r...@amd64-builder.daemonology.net:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64 (freebsd </root>) 1 # kldload kvmclock (freebsd </root>) 0 # sysctl kern.timecounter kern.timecounter.tsc_shift: 1 kern.timecounter.smp_tsc_adjust: 0 kern.timecounter.smp_tsc: 0 kern.timecounter.invariant_tsc: 0 kern.timecounter.fast_gettime: 1 kern.timecounter.tick: 1 kern.timecounter.choice: kvmclock(975) i8254(0) ACPI-fast(900) TSC-low(-100) dummy(-1000000) kern.timecounter.hardware: kvmclock kern.timecounter.alloweddeviation: 5 kern.timecounter.timehands_count: 2 kern.timecounter.stepwarnings: 0 kern.timecounter.tc.kvmclock.quality: 975 kern.timecounter.tc.kvmclock.frequency: 1000000000 kern.timecounter.tc.kvmclock.counter: 2592740499 kern.timecounter.tc.kvmclock.mask: 4294967295 kern.timecounter.tc.i8254.quality: 0 kern.timecounter.tc.i8254.frequency: 1193182 kern.timecounter.tc.i8254.counter: 56633 kern.timecounter.tc.i8254.mask: 65535 kern.timecounter.tc.ACPI-fast.quality: 900 kern.timecounter.tc.ACPI-fast.frequency: 3579545 kern.timecounter.tc.ACPI-fast.counter: 15142699 kern.timecounter.tc.ACPI-fast.mask: 16777215 kern.timecounter.tc.TSC-low.quality: -100 kern.timecounter.tc.TSC-low.frequency: 1300025233 kern.timecounter.tc.TSC-low.counter: 3482345276 kern.timecounter.tc.TSC-low.mask: 4294967295 (freebsd </root>) 0 # time dc3dd wipe=/dev/vtbd1 dc3dd 7.2.646 started at 2021-06-04 14:54:43 +0200 compiled options: command line: dc3dd wipe=/dev/vtbd1 device size: 209715200 sectors (probed), 107,374,182,400 bytes sector size: 512 bytes (probed) 2559508480 bytes ( 2.4 G ) copied ( 2% ), 145 s, 17 M/s input results for pattern `00': 4999040 sectors in output results for device `/dev/vtbd1': 4999040 sectors out dc3dd aborted at 2021-06-04 14:57:07 +0200 dc3dd wipe=/dev/vtbd1 0.79s user 1.55s system 1% cpu 2:24.62 total (freebsd </root>) 1 # sysctl kern.timecounter.hardware=TSC-low kern.timecounter.hardware: kvmclock -> TSC-low (freebsd </root>) 0 # time dc3dd wipe=/dev/vtbd1 dc3dd 7.2.646 started at 2021-06-04 14:59:07 +0200 compiled options: command line: dc3dd wipe=/dev/vtbd1 device size: 209715200 sectors (probed), 107,374,182,400 bytes sector size: 512 bytes (probed) 2588770304 bytes ( 2.4 G ) copied ( 2% ), 150 s, 16 M/s input results for pattern `00': 5056192 sectors in output results for device `/dev/vtbd1': 5056192 sectors out dc3dd aborted at 2021-06-04 15:01:37 +0200 dc3dd wipe=/dev/vtbd1 0.99s user 1.53s system 1% cpu 2:29.96 total This volume should be good for 5000 IOPs and 250MB/s. -- You are receiving this mail because: You are the assignee for the bug. _______________________________________________ freebsd-virtualization@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization To unsubscribe, send any mail to "freebsd-virtualization-unsubscr...@freebsd.org"
