Add a new line to top that provides a brief summary of the ZFS ARC memory
usage on hosts using ZFS. The new line displays the total amount of RAM used by the ARC along with the size of MFU, MRU, anonymous (in flight), headers, and other (miscellaneous) sub-categories. The line is not displayed on systems that are not using ZFS. Reviewed by: avg, fs@ MFC after: 3 days
This commit is contained in:
John Baldwin
parent
50a994c98b
commit
2e52fb92ff
@ -66,6 +66,7 @@ char *screenbuf = NULL;
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static char **procstate_names;
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static char **cpustate_names;
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static char **memory_names;
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static char **arc_names;
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static char **swap_names;
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static int num_procstates;
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@ -100,6 +101,8 @@ int x_brkdn = 15;
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int y_brkdn = 1;
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int x_mem = 5;
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int y_mem = 3;
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int x_arc = 5;
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int y_arc = 4;
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int x_swap = 6;
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int y_swap = 4;
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int y_message = 5;
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@ -216,6 +219,8 @@ struct statics *statics;
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num_memory = string_count(memory_names);
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lmemory = (int *)malloc(num_memory * sizeof(int));
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arc_names = statics->arc_names;
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/* calculate starting columns where needed */
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cpustate_total_length = 0;
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pp = cpustate_names;
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@ -626,6 +631,46 @@ int *stats;
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line_update(memory_buffer, new, x_mem, y_mem);
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}
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/*
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* *_arc(stats) - print "ARC: " followed by the ARC summary string
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*
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* Assumptions: cursor is on "lastline"
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* for i_arc ONLY: cursor is on the previous line
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*/
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char arc_buffer[MAX_COLS];
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i_arc(stats)
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int *stats;
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{
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if (arc_names == NULL)
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return (0);
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fputs("\nARC: ", stdout);
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lastline++;
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/* format and print the memory summary */
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summary_format(arc_buffer, stats, arc_names);
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fputs(arc_buffer, stdout);
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}
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u_arc(stats)
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int *stats;
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{
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static char new[MAX_COLS];
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if (arc_names == NULL)
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return (0);
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/* format the new line */
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summary_format(new, stats, arc_names);
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line_update(arc_buffer, new, x_arc, y_arc);
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}
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/*
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* *_swap(stats) - print "Swap: " followed by the swap summary string
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*
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@ -19,6 +19,8 @@ extern int x_brkdn; /* 15 */
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extern int y_brkdn; /* 1 */
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extern int x_mem; /* 5 */
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extern int y_mem; /* 3 */
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extern int x_arc; /* 5 */
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extern int y_arc; /* 4 */
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extern int x_swap; /* 6 */
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extern int y_swap; /* 4 */
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extern int y_message; /* 5 */
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@ -16,6 +16,7 @@ struct statics
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char **procstate_names;
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char **cpustate_names;
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char **memory_names;
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char **arc_names;
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char **swap_names;
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#ifdef ORDER
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char **order_names;
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@ -42,6 +43,7 @@ struct system_info
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int *procstates;
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int *cpustates;
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int *memory;
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int *arc;
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int *swap;
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struct timeval boottime;
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int ncpus;
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@ -121,6 +121,8 @@ int i_cpustates();
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int u_cpustates();
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int i_memory();
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int u_memory();
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int i_arc();
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int u_arc();
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int i_swap();
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int u_swap();
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int i_message();
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@ -135,6 +137,7 @@ int (*d_loadave)() = i_loadave;
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int (*d_procstates)() = i_procstates;
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int (*d_cpustates)() = i_cpustates;
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int (*d_memory)() = i_memory;
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int (*d_arc)() = i_arc;
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int (*d_swap)() = i_swap;
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int (*d_message)() = i_message;
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int (*d_header)() = i_header;
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@ -647,6 +650,7 @@ restart:
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/* display memory stats */
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(*d_memory)(system_info.memory);
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(*d_arc)(system_info.arc);
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/* display swap stats */
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(*d_swap)(system_info.swap);
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@ -712,6 +716,7 @@ restart:
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d_procstates = u_procstates;
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d_cpustates = u_cpustates;
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d_memory = u_memory;
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d_arc = u_arc;
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d_swap = u_swap;
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d_message = u_message;
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d_header = u_header;
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@ -1129,6 +1134,7 @@ reset_display()
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d_procstates = i_procstates;
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d_cpustates = i_cpustates;
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d_memory = i_memory;
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d_arc = i_arc;
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d_swap = i_swap;
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d_message = i_message;
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d_header = i_header;
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@ -176,6 +176,12 @@ char *memorynames[] = {
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"K Free", NULL
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};
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int arc_stats[7];
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char *arcnames[] = {
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"K Total, ", "K MRU, ", "K MFU, ", "K Anon, ", "K Header, ", "K Other",
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NULL
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};
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int swap_stats[7];
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char *swapnames[] = {
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"K Total, ", "K Used, ", "K Free, ", "% Inuse, ", "K In, ", "K Out",
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@ -194,6 +200,7 @@ static struct kinfo_proc *previous_procs;
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static struct kinfo_proc **previous_pref;
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static int previous_proc_count = 0;
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static int previous_proc_count_max = 0;
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static int arc_enabled;
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/* total number of io operations */
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static long total_inblock;
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@ -239,6 +246,7 @@ static int compare_tid(const void *a, const void *b);
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static const char *format_nice(const struct kinfo_proc *pp);
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static void getsysctl(const char *name, void *ptr, size_t len);
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static int swapmode(int *retavail, int *retfree);
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static void update_layout(void);
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void
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toggle_pcpustats(void)
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@ -246,24 +254,30 @@ toggle_pcpustats(void)
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if (ncpus == 1)
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return;
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update_layout();
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}
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/* Adjust display based on ncpus and the ARC state. */
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static void
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update_layout(void)
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{
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y_mem = 3;
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y_swap = 4 + arc_enabled;
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y_idlecursor = 5 + arc_enabled;
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y_message = 5 + arc_enabled;
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y_header = 6 + arc_enabled;
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y_procs = 7 + arc_enabled;
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Header_lines = 7 + arc_enabled;
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/* Adjust display based on ncpus */
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if (pcpu_stats) {
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y_mem += ncpus - 1; /* 3 */
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y_swap += ncpus - 1; /* 4 */
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y_idlecursor += ncpus - 1; /* 5 */
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y_message += ncpus - 1; /* 5 */
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y_header += ncpus - 1; /* 6 */
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y_procs += ncpus - 1; /* 7 */
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Header_lines += ncpus - 1; /* 7 */
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} else {
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y_mem = 3;
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y_swap = 4;
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y_idlecursor = 5;
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y_message = 5;
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y_header = 6;
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y_procs = 7;
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Header_lines = 7;
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y_mem = ncpus - 1;
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y_swap += ncpus - 1;
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y_idlecursor += ncpus - 1;
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y_message += ncpus - 1;
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y_header += ncpus - 1;
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y_procs += ncpus - 1;
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Header_lines += ncpus - 1;
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}
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}
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@ -271,6 +285,7 @@ int
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machine_init(struct statics *statics, char do_unames)
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{
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int i, j, empty, pagesize;
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uint64_t arc_size;
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size_t size;
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struct passwd *pw;
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@ -282,6 +297,11 @@ machine_init(struct statics *statics, char do_unames)
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size != sizeof(smpmode))
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smpmode = 0;
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size = sizeof(arc_size);
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if (sysctlbyname("kstat.zfs.misc.arcstats.size", &arc_size, &size,
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NULL, 0) == 0 && arc_size != 0)
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arc_enabled = 1;
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if (do_unames) {
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while ((pw = getpwent()) != NULL) {
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if (strlen(pw->pw_name) > namelength)
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@ -322,6 +342,10 @@ machine_init(struct statics *statics, char do_unames)
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statics->procstate_names = procstatenames;
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statics->cpustate_names = cpustatenames;
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statics->memory_names = memorynames;
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if (arc_enabled)
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statics->arc_names = arcnames;
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else
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statics->arc_names = NULL;
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statics->swap_names = swapnames;
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#ifdef ORDER
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statics->order_names = ordernames;
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@ -356,8 +380,7 @@ machine_init(struct statics *statics, char do_unames)
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pcpu_cpu_states = calloc(1, size);
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statics->ncpus = ncpus;
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if (pcpu_stats)
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toggle_pcpustats();
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update_layout();
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/* all done! */
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return (0);
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@ -408,7 +431,7 @@ get_system_info(struct system_info *si)
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struct loadavg sysload;
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int mib[2];
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struct timeval boottime;
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size_t bt_size;
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uint64_t arc_stat, arc_stat2;
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int i, j;
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size_t size;
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@ -487,6 +510,23 @@ get_system_info(struct system_info *si)
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swap_stats[6] = -1;
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}
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if (arc_enabled) {
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GETSYSCTL("kstat.zfs.misc.arcstats.size", arc_stat);
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arc_stats[0] = arc_stat >> 10;
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GETSYSCTL("vfs.zfs.mfu_size", arc_stat);
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arc_stats[1] = arc_stat >> 10;
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GETSYSCTL("vfs.zfs.mru_size", arc_stat);
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arc_stats[2] = arc_stat >> 10;
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GETSYSCTL("vfs.zfs.anon_size", arc_stat);
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arc_stats[3] = arc_stat >> 10;
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GETSYSCTL("kstat.zfs.misc.arcstats.hdr_size", arc_stat);
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GETSYSCTL("kstat.zfs.misc.arcstats.l2_hdr_size", arc_stat2);
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arc_stats[4] = arc_stat + arc_stat2 >> 10;
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GETSYSCTL("kstat.zfs.misc.arcstats.other_size", arc_stat);
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arc_stats[5] = arc_stat >> 10;
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si->arc = arc_stats;
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}
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/* set arrays and strings */
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if (pcpu_stats) {
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si->cpustates = pcpu_cpu_states;
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@ -511,8 +551,8 @@ get_system_info(struct system_info *si)
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*/
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mib[0] = CTL_KERN;
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mib[1] = KERN_BOOTTIME;
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bt_size = sizeof(boottime);
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if (sysctl(mib, 2, &boottime, &bt_size, NULL, 0) != -1 &&
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size = sizeof(boottime);
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if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 &&
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boottime.tv_sec != 0) {
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si->boottime = boottime;
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} else {
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@ -3,6 +3,7 @@
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.SH DESCRIPTION OF MEMORY
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Mem: 9220K Active, 1M Inact, 3284K Wired, 1M Cache, 2M Buf, 1320K Free
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ARC: 2048K Total, 342K MRU, 760K MFU, 272K Anon, 232K Header, 442K Other
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Swap: 91M Total, 79M Free, 13% Inuse, 80K In, 104K Out
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.TP
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.B K:
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@ -16,6 +17,7 @@ Gigabyte
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.TP
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.B %:
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1/100
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.SS Physical Memory Stats
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.TP
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.B Active:
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number of bytes active
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@ -35,6 +37,27 @@ number of bytes used for BIO-level disk caching
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.TP
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.B Free:
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number of bytes free
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.SS ZFS ARC Stats
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These stats are only displayed when the ARC is in use.
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.TP
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.B Total:
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number of wired bytes used for the ZFS ARC
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.TP
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.B MRU:
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number of ARC bytes holding most recently used data
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.TP
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.B MFU:
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number of ARC bytes holding most frequently used data
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.TP
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.B Anon:
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number of ARC bytes holding in flight data
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.TP
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.B Header:
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number of ARC bytes holding headers
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.TP
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.B Other
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miscellaneous ARC bytes
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.SS Swap Stats
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.TP
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.B Total:
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total available swap usage
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