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author | jkoshy <jkoshy@FreeBSD.org> | 2005-04-19 04:01:25 +0000 |
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committer | jkoshy <jkoshy@FreeBSD.org> | 2005-04-19 04:01:25 +0000 |
commit | dc3444cd91762fa913e417f7f7a7a0484872f54e (patch) | |
tree | 3175e06cfbec643ca7426d756f2362160f9309d4 /sys/sys/pmckern.h | |
parent | 8c509864f2dd0cdcc6116de38bf9137583c4ab2f (diff) | |
download | FreeBSD-src-dc3444cd91762fa913e417f7f7a7a0484872f54e.zip FreeBSD-src-dc3444cd91762fa913e417f7f7a7a0484872f54e.tar.gz |
Bring a working snapshot of hwpmc(4), its associated libraries, userland utilities
and documentation into -CURRENT.
Bump FreeBSD_version.
Reviewed by: alc, jhb (kernel changes)
Diffstat (limited to 'sys/sys/pmckern.h')
-rw-r--r-- | sys/sys/pmckern.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/sys/sys/pmckern.h b/sys/sys/pmckern.h new file mode 100644 index 0000000..3c11172 --- /dev/null +++ b/sys/sys/pmckern.h @@ -0,0 +1,93 @@ +/*- + * Copyright (c) 2003, Joseph Koshy + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +/* + * PMC interface used by the base kernel. + */ + +#ifndef _SYS_PMCKERN_H_ +#define _SYS_PMCKERN_H_ + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/proc.h> +#include <sys/sx.h> + +#define PMC_FN_PROCESS_EXIT 1 +#define PMC_FN_PROCESS_EXEC 2 +#define PMC_FN_PROCESS_FORK 3 +#define PMC_FN_CSW_IN 4 +#define PMC_FN_CSW_OUT 5 + +/* hook */ +extern int (*pmc_hook)(struct thread *_td, int _function, void *_arg); +extern int (*pmc_intr)(int cpu, uintptr_t pc); + +/* SX lock protecting the hook */ +extern struct sx pmc_sx; + +/* hook invocation; for use within the kernel */ +#define PMC_CALL_HOOK(t, cmd, arg) \ +do { \ + sx_slock(&pmc_sx); \ + if (pmc_hook != NULL) \ + (pmc_hook)((t), (cmd), (arg)); \ + sx_sunlock(&pmc_sx); \ +} while (0) + +/* hook invocation that needs an exclusive lock */ +#define PMC_CALL_HOOK_X(t, cmd, arg) \ +do { \ + sx_xlock(&pmc_sx); \ + if (pmc_hook != NULL) \ + (pmc_hook)((t), (cmd), (arg)); \ + sx_xunlock(&pmc_sx); \ +} while (0) + +/* context switches cannot take locks */ +#define PMC_SWITCH_CONTEXT(t, cmd) \ +do { \ + if (pmc_hook != NULL) \ + (pmc_hook)((t), (cmd), NULL); \ +} while (0) + + +/* + * check if a process is using HWPMCs. + */ + +#define PMC_PROC_IS_USING_PMCS(p) \ + (__predict_false(atomic_load_acq_int(&(p)->p_flag) & \ + P_HWPMC)) + +/* helper functions */ +int pmc_cpu_is_disabled(int _cpu); +int pmc_cpu_is_logical(int _cpu); + +#endif /* _SYS_PMCKERN_H_ */ |