From: Ben Gras <ben@minix3.org>
Date: Wed, 1 Jun 2005 09:34:18 +0000 (+0000)
Subject: Added support for lock()/unlock() timing registration; also phys_zero system
X-Git-Tag: v3.1.0~790
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/zpipe.c?a=commitdiff_plain;h=e0ffcdadd1910681c46ddaeb7bb5004a35871aa6;p=minix.git

Added support for lock()/unlock() timing registration; also phys_zero system
call
---

diff --git a/include/minix/com.h b/include/minix/com.h
index 6121c516d..e52cf1a2b 100755
--- a/include/minix/com.h
+++ b/include/minix/com.h
@@ -196,7 +196,6 @@
  * modifying the system call numbers. The numbers here determine which call
  * is made from the call vector.
  */ 
-#define NR_SYS_CALLS	33	/* number of system calls */ 
 #  define SYS_TIMES	 0	/* sys_times(proc_nr, bufptr) */
 #  define SYS_XIT	 1	/* sys_xit(parent, proc) */
 #  define SYS_GETSIG     2	/* sys_getsig(proc_nr, sig_map) */
@@ -230,6 +229,8 @@
 #  define SYS_VIRCOPY   30	/* sys_vircopy(src,seg,addr,dst,seg,addr,cnt) */
 #  define SYS_PHYSCOPY  31 	/* sys_physcopy(src_addr,dst_addr,count) */
 #  define SYS_VIRVCOPY  32	/* sys_virvcopy(vec_ptr, vec_size) */
+#  define SYS_PHYSZERO  33	/* sys_physzero(addr,count) */
+#define NR_SYS_CALLS	34	/* number of system calls */ 
 
 /* Field names for SYS_MEM, SYS_KMALLOC. */
 #define MEM_CHUNK_BASE	m4_l1	/* physical base address */
@@ -328,6 +329,7 @@
 #   define GET_SCHEDINFO  10	/* get scheduling queues */
 #   define GET_PROC 	  11	/* get process slot if given process */
 #   define GET_MACHINE 	  12	/* get machine information */
+#   define GET_LOCKTIMING 13	/* get lock()/unlock() latency timing */
 #define I_PROC_NR      m7_i4	/* calling process */
 #define I_VAL_PTR      m7_p1	/* virtual address at caller */ 
 #define I_VAL_LEN      m7_i1	/* max length of value */
@@ -373,6 +375,9 @@
 #define PR_IP_PTR       m1_p3	/* initial value for ip after exec */
 #define PR_MEM_PTR	m1_p1	/* tells where memory map is for sys_newmap */
 
+/* Field names for SYS_PHYSZERO */
+#define PZ_MEM_PTR	m1_p1	/* base */
+#define PZ_COUNT	m1_i1	/* count */
 
 /*===========================================================================*
  *                Miscellaneous messages, mainly used by IS		     *
diff --git a/include/minix/config.h b/include/minix/config.h
index 6d8ccb4f3..51d81f7ed 100755
--- a/include/minix/config.h
+++ b/include/minix/config.h
@@ -122,7 +122,17 @@
 #define	NR_RS_LINES	   0	/* # rs232 terminals (0 to 4) */
 #define	NR_PTYS		   32	/* # pseudo terminals (0 to 64) */
 
-#define ENABLE_MESSAGE_STATS	0
+/* these timing functions use quite a bit more kernel memory to hold
+ * timing data.
+ */
+#define ENABLE_INT_TIMING	0
+#define ENABLE_LOCK_TIMING	0
+
+#if ENABLE_LOCK_TIMING
+#define TIMING_POINTS		20
+#define TIMING_CATEGORIES	20
+#define TIMING_NAME		10
+#endif
 
 /*===========================================================================*
  *	There are no user-settable parameters after this line		     *
diff --git a/include/minix/syslib.h b/include/minix/syslib.h
index 2e034255a..7c2d89554 100755
--- a/include/minix/syslib.h
+++ b/include/minix/syslib.h
@@ -102,6 +102,7 @@ _PROTOTYPE(int sys_vircopy, (int src_proc, int src_seg, vir_bytes src_vir,
 	sys_physcopy(NONE, PHYS_SEG, src_phys, NONE, PHYS_SEG, dst_phys, bytes)
 _PROTOTYPE(int sys_physcopy, (int src_proc, int src_seg, vir_bytes src_vir,
 	int dst_proc, int dst_seg, vir_bytes dst_vir, phys_bytes bytes)	);
+_PROTOTYPE(int sys_physzero, (phys_bytes base, phys_bytes bytes)	);
 
 _PROTOTYPE(int sys_umap, (int proc_nr, int seg, vir_bytes vir_addr,
 	 vir_bytes bytes, phys_bytes *phys_addr) 			);
@@ -124,6 +125,7 @@ _PROTOTYPE(int sys_kmalloc, (size_t size, phys_bytes *phys_base)		);
 #define sys_getkenv(k,kl,v,vl)	sys_getinfo(GET_KENV, v,vl, k,kl)
 #define sys_getschedinfo(v1,v2)	sys_getinfo(GET_SCHEDINFO, v1,0, v2,0)
 #define sys_getkaddr(dst)	sys_getinfo(GET_KADDRESSES, dst, 0,0,0)
+#define sys_getlocktimings(dst)	sys_getinfo(GET_LOCKTIMING, dst, 0,0,0)
 _PROTOTYPE(int sys_getinfo, (int request, void *val_ptr, int val_len,
 				 void *key_ptr, int key_len)		);
 _PROTOTYPE(int sys_exit, (int status)					);
diff --git a/include/minix/type.h b/include/minix/type.h
index 1869c3011..c78221778 100755
--- a/include/minix/type.h
+++ b/include/minix/type.h
@@ -119,4 +119,15 @@ struct machine {
   int vdu_vga;
 };
 
+/* Timing data of lock()/unlock() sequences, if selected to be compiled in. */
+
+#if ENABLE_LOCK_TIMING
+struct lock_timedata {
+	char names[TIMING_NAME];
+	unsigned long lock_timings[TIMING_POINTS];
+	unsigned long lock_timings_range[2];
+	unsigned long binsize, resets, misses, measurements;
+};
+#endif
+
 #endif /* _TYPE_H */