Date: Sat, 30 Apr 2011 23:28:07 +0000 (UTC) From: Attilio Rao <attilio@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r221285 - projects/largeSMP/sys/kern Message-ID: <201104302328.p3UNS7Wu067088@svn.freebsd.org>
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Author: attilio Date: Sat Apr 30 23:28:07 2011 New Revision: 221285 URL: http://svn.freebsd.org/changeset/base/221285 Log: - Remove the following sysctl: kern.sched.ipiwakeup.onecpu kern.sched.ipiwakeup.htt2 Because they are absolutely obsolete. Probabilly the whole wakeup forward mechanism should be revisited for a better fitting in modern hw. - As map2 variable is no longer used rename map3 to map2 - Fix a string by making more informative the msg and removing the arguments passing Approved by: julian Modified: projects/largeSMP/sys/kern/sched_4bsd.c Modified: projects/largeSMP/sys/kern/sched_4bsd.c ============================================================================== --- projects/largeSMP/sys/kern/sched_4bsd.c Sat Apr 30 23:12:37 2011 (r221284) +++ projects/largeSMP/sys/kern/sched_4bsd.c Sat Apr 30 23:28:07 2011 (r221285) @@ -235,16 +235,6 @@ SYSCTL_INT(_kern_sched_ipiwakeup, OID_AU &forward_wakeup_use_loop, 0, "Use a loop to find idle cpus"); -static int forward_wakeup_use_single = 0; -SYSCTL_INT(_kern_sched_ipiwakeup, OID_AUTO, onecpu, CTLFLAG_RW, - &forward_wakeup_use_single, 0, - "Only signal one idle cpu"); - -static int forward_wakeup_use_htt = 0; -SYSCTL_INT(_kern_sched_ipiwakeup, OID_AUTO, htt2, CTLFLAG_RW, - &forward_wakeup_use_htt, 0, - "account for htt"); - #endif #if 0 static int sched_followon = 0; @@ -1064,7 +1054,7 @@ static int forward_wakeup(int cpunum) { struct pcpu *pc; - cpumask_t dontuse, id, map, map2, map3, me; + cpumask_t dontuse, id, map, map2, me; mtx_assert(&sched_lock, MA_OWNED); @@ -1089,13 +1079,13 @@ forward_wakeup(int cpunum) return (0); dontuse = me | stopped_cpus | hlt_cpus_mask; - map3 = 0; + map2 = 0; if (forward_wakeup_use_loop) { SLIST_FOREACH(pc, &cpuhead, pc_allcpu) { id = pc->pc_cpumask; if ((id & dontuse) == 0 && pc->pc_curthread == pc->pc_idlethread) { - map3 |= id; + map2 |= id; } } } @@ -1106,33 +1096,19 @@ forward_wakeup(int cpunum) /* If they are both on, compare and use loop if different. */ if (forward_wakeup_use_loop) { - if (map != map3) { - printf("map (%02X) != map3 (%02X)\n", map, - map3); - map = map3; + if (map != map2) { + printf("map != map2, loop method preferred\n"); + map = map2; } } } else { - map = map3; + map = map2; } /* If we only allow a specific CPU, then mask off all the others. */ if (cpunum != NOCPU) { KASSERT((cpunum <= mp_maxcpus),("forward_wakeup: bad cpunum.")); map &= (1 << cpunum); - } else { - /* Try choose an idle die. */ - if (forward_wakeup_use_htt) { - map2 = (map & (map >> 1)) & 0x5555; - if (map2) { - map = map2; - } - } - - /* Set only one bit. */ - if (forward_wakeup_use_single) { - map = map & ((~map) + 1); - } } if (map) { forward_wakeups_delivered++;
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