Date: Thu, 14 Jul 2022 20:15:40 GMT From: John Baldwin <jhb@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: b62848b0c3ff - main - Reclaim unused ithread priorities for user time-sharing threads. Message-ID: <202207142015.26EKFe0S088377@gitrepo.freebsd.org>
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The branch main has been updated by jhb: URL: https://cgit.FreeBSD.org/src/commit/?id=b62848b0c3ffcd6c1b0f0b6e617c030acf30f603 commit b62848b0c3ffcd6c1b0f0b6e617c030acf30f603 Author: John Baldwin <jhb@FreeBSD.org> AuthorDate: 2022-07-14 20:14:58 +0000 Commit: John Baldwin <jhb@FreeBSD.org> CommitDate: 2022-07-14 20:14:58 +0000 Reclaim unused ithread priorities for user time-sharing threads. Leave one band of ithread priorities available below PI_SOFT for demoted ithreads but reclaim additional ithread priorities for use by user time-sharing threads. This is an ABI change in that PZERO moves up so old ps and top binaries will not format priorities correctly on newer kernels, but that is a cosmetic rather than functional change. Reviewed by: kib, markj Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D35647 --- sys/sys/priority.h | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/sys/sys/priority.h b/sys/sys/priority.h index 8fbb9b03f77f..ab97baeeb822 100644 --- a/sys/sys/priority.h +++ b/sys/sys/priority.h @@ -69,10 +69,10 @@ * Priorities range from 0 to 255, but differences of less then 4 (RQ_PPQ) * are insignificant. Ranges are as follows: * - * Interrupt threads: 0 - 47 - * Realtime user threads: 48 - 79 - * Top half kernel threads: 80 - 119 - * Time sharing user threads: 120 - 223 + * Interrupt threads: 0 - 15 + * Realtime user threads: 16 - 47 + * Top half kernel threads: 48 - 87 + * Time sharing user threads: 88 - 223 * Idle user threads: 224 - 255 * * XXX If/When the specific interrupt thread and top half thread ranges @@ -100,10 +100,10 @@ #define PI_SOFTCLOCK PI_SOFT #define PI_SWI(x) PI_SOFT -#define PRI_MIN_REALTIME (48) +#define PRI_MIN_REALTIME (16) #define PRI_MAX_REALTIME (PRI_MIN_KERN - 1) -#define PRI_MIN_KERN (80) +#define PRI_MIN_KERN (48) #define PRI_MAX_KERN (PRI_MIN_TIMESHARE - 1) #define PSWP (PRI_MIN_KERN + 0) @@ -117,7 +117,7 @@ #define PLOCK (PRI_MIN_KERN + 32) #define PPAUSE (PRI_MIN_KERN + 36) -#define PRI_MIN_TIMESHARE (120) +#define PRI_MIN_TIMESHARE (88) #define PRI_MAX_TIMESHARE (PRI_MIN_IDLE - 1) #define PUSER (PRI_MIN_TIMESHARE)
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