Make systat -swap use new kvm_swapinfo() function
This commit is contained in:
Matthew Dillon
parent
782f8687be
commit
e53c5e2053
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=43047
@ -36,7 +36,7 @@
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static char sccsid[] = "@(#)swap.c 8.3 (Berkeley) 4/29/95";
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#endif
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static const char rcsid[] =
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"$Id: swap.c,v 1.6 1998/06/09 04:17:27 imp Exp $";
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"$Id: swap.c,v 1.7 1998/10/08 09:56:10 obrien Exp $";
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#endif /* not lint */
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/*
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@ -66,36 +66,8 @@ void showspace __P((char *header, int hlen, long blocksize));
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kvm_t *kd;
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struct nlist syms[] = {
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{ "_swaplist" },/* list of free swap areas */
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#define VM_SWAPLIST 0
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{ "_swdevt" }, /* list of swap devices and sizes */
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#define VM_SWDEVT 1
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{ "_nswap" }, /* size of largest swap device */
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#define VM_NSWAP 2
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{ "_nswdev" }, /* number of swap devices */
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#define VM_NSWDEV 3
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{ "_dmmax" }, /* maximum size of a swap block */
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#define VM_DMMAX 4
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{ 0 }
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};
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static int nswap, nswdev, dmmax;
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static struct swdevt *sw;
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static long *perdev, blocksize;
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static int nfree, hlen;
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static struct rlisthdr swaplist;
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#define SVAR(var) __STRING(var) /* to force expansion */
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#define KGET(idx, var) \
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KGET1(idx, &var, sizeof(var), SVAR(var), (0))
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#define KGET1(idx, p, s, msg, rv) \
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KGET2(syms[idx].n_value, p, s, msg, rv)
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#define KGET2(addr, p, s, msg, rv) \
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if (kvm_read(kd, addr, p, s) != s) { \
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error("cannot read %s: %s", msg, kvm_geterr(kd)); \
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return rv; \
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}
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static long blocksize;
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static int hlen;
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WINDOW *
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openswap()
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@ -128,82 +100,27 @@ initswap()
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char *cp;
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static int once = 0;
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u_long ptr;
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struct kvm_swap dummy;
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if (once)
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return (1);
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if (kvm_nlist(kd, syms)) {
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snprintf(msgbuf, sizeof(msgbuf), "systat: swap: cannot find");
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cp = msgbuf + strlen(msgbuf) + 1;
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for (i = 0;
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syms[i].n_name != NULL && cp - msgbuf < sizeof(msgbuf);
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i++) {
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if (syms[i].n_value == 0) {
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snprintf(cp, sizeof(msgbuf) - (cp - msgbuf),
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" %s", syms[i].n_name);
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cp += strlen(cp) + 1;
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}
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}
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if (kvm_getswapinfo(kd, &dummy, 1, 0) < 0) {
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snprintf(msgbuf, sizeof(msgbuf), "systat: kvm_getswapinfo failed");
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error(msgbuf);
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return (0);
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}
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KGET(VM_NSWAP, nswap);
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KGET(VM_NSWDEV, nswdev);
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KGET(VM_DMMAX, dmmax);
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if ((sw = malloc(nswdev * sizeof(*sw))) == NULL ||
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(perdev = malloc(nswdev * sizeof(*perdev))) == NULL)
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err(1, "malloc");
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KGET1(VM_SWDEVT, &ptr, sizeof ptr, "swdevt", (0));
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KGET2(ptr, sw, nswdev * sizeof(*sw), "*swdevt", (0));
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once = 1;
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return (1);
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}
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static struct kvm_swap kvmsw[16];
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static int kvnsw;
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void
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fetchswap()
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{
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struct rlist head;
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struct rlist *swapptr;
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/* Count up swap space. */
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nfree = 0;
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memset(perdev, 0, nswdev * sizeof(*perdev));
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KGET1(VM_SWAPLIST, &swaplist, sizeof swaplist, "swaplist", /* none */);
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swapptr = swaplist.rlh_list;
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while (swapptr) {
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int top, bottom, next_block;
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KGET2((unsigned long)swapptr, &head,
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sizeof(struct rlist), "swapptr", /* none */);
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top = head.rl_end;
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bottom = head.rl_start;
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nfree += top - bottom + 1;
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/*
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* Swap space is split up among the configured disks.
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*
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* For interleaved swap devices, the first dmmax blocks
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* of swap space some from the first disk, the next dmmax
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* blocks from the next, and so on up to nswap blocks.
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*
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* The list of free space joins adjacent free blocks,
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* ignoring device boundries. If we want to keep track
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* of this information per device, we'll just have to
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* extract it ourselves.
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*/
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while (top / dmmax != bottom / dmmax) {
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next_block = ((bottom + dmmax) / dmmax);
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perdev[(bottom / dmmax) % nswdev] +=
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next_block * dmmax - bottom;
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bottom = next_block * dmmax;
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}
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perdev[(bottom / dmmax) % nswdev] +=
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top - bottom + 1;
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swapptr = head.rl_next;
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}
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kvnsw = kvm_getswapinfo(kd, kvmsw, 16, 0);
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}
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void
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@ -218,58 +135,61 @@ labelswap()
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mvwprintw(wnd, row++, 0, "%-5s%*s%9s %55s",
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"Disk", hlen, header, "Used",
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"/0% /10% /20% /30% /40% /50% /60% /70% /80% /90% /100");
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for (i = 0; i < nswdev; i++) {
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if (!sw[i].sw_freed)
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continue;
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p = devname(sw[i].sw_dev, S_IFBLK);
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mvwprintw(wnd, i + 1, 0, "%-5s",
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sw[i].sw_dev == NODEV ? "[NFS]" :
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p == NULL ? "??" : p);
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for (i = 0; i < kvnsw; ++i) {
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mvwprintw(wnd, i + 1, 0, "%-5s", kvmsw[i].ksw_devname);
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}
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}
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void
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showswap()
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{
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int col, div, i, j, k, avail, npfree, used, xsize, xfree;
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int i;
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int pagesize = getpagesize();
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div = blocksize / 512;
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avail = npfree = 0;
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for (i = k = 0; i < nswdev; i++) {
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/*
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* Don't report statistics for partitions which have not
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* yet been activated via swapon(8).
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*/
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if (!sw[i].sw_freed)
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continue;
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#define CONVERT(v) ((int)((quad_t)(v) * pagesize / blocksize))
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col = 5;
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mvwprintw(wnd, i + 1, col, "%*d", hlen, sw[i].sw_nblks / div);
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for (i = 0; i <= kvnsw; ++i) {
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int col = 5;
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int count;
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if (i == kvnsw) {
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if (kvnsw == 1)
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break;
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mvwprintw(
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wnd,
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i + 1,
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col,
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"%-5s",
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"Total"
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);
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col += 5;
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}
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mvwprintw(
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wnd,
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i + 1,
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col,
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"%*d",
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hlen,
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CONVERT(kvmsw[i].ksw_total)
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);
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col += hlen;
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/*
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* The first dmmax is never allocated to avoid trashing of
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* disklabels
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*/
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xsize = sw[i].sw_nblks - dmmax;
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xfree = perdev[i];
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used = xsize - xfree;
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mvwprintw(wnd, i + 1, col, "%9d ", used / div);
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for (j = (100 * used / xsize + 1) / 2; j > 0; j--)
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waddch(wnd, 'X');
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npfree++;
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avail += xsize;
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k++;
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}
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/*
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* If only one partition has been set up via swapon(8), we don't
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* need to bother with totals.
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*/
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if (npfree > 1) {
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used = avail - nfree;
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mvwprintw(wnd, k + 1, 0, "%-5s%*d%9d ",
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"Total", hlen, avail / div, used / div);
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for (j = (100 * used / avail + 1) / 2; j > 0; j--)
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mvwprintw(
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wnd,
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i + 1,
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col,
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"%9d ",
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CONVERT(kvmsw[i].ksw_used)
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);
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count = (int)((double)kvmsw[i].ksw_used * 49.999 /
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(double)kvmsw[i].ksw_total);
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while (count >= 0) {
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waddch(wnd, 'X');
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--count;
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}
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}
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}
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