Date: Wed, 20 Sep 2017 21:26:53 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-scsi@FreeBSD.org Subject: [Bug 221956] cam iosched: Schedule cam_iosched_ticker() quanta times per second Message-ID: <bug-221956-5312-pxQQYFYtrd@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-221956-5312@https.bugs.freebsd.org/bugzilla/> References: <bug-221956-5312@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D221956 --- Comment #3 from commit-hook@freebsd.org --- A commit references this bug: Author: imp Date: Wed Sep 20 21:25:56 UTC 2017 New revision: 323831 URL: https://svnweb.freebsd.org/changeset/base/323831 Log: cam iosched: Schedule cam_iosched_ticker() quanta times per second Previously callout_reset() was called with a "ticks" value that was off by one. As a result cam_iosched_ticker() was called a bit too frequently: On systems with hz=3D1000 a quanta value of 200 resulted in ~250 calls and a value of 100 in ~111 calls. For the "queue_depth" and "bandwidth" limiters the difference doesn't matter but the "iops" limiter depends on the scheduling to enforce the correct maximum. PR: 221956 Obtained from: ElectroBSD Submitted by: Fabian Keil Differential Revision: https://reviews.freebsd.org/D12350 Changes: head/sys/cam/cam_iosched.c --=20 You are receiving this mail because: You are the assignee for the bug.=
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