lproc_obdfilter.c

来自「lustre 1.6.5 source code」· C语言 代码 · 共 459 行 · 第 1/2 页

void filter_tally(struct obd_export *exp, struct page **pages, int nr_pages,
                  unsigned long *blocks, int blocks_per_page, int wr)
{
        struct filter_obd *filter = &exp->exp_obd->u.filter;
        struct filter_export_data *fed = &exp->exp_filter_data;
        struct page *last_page = NULL;
        unsigned long *last_block = NULL;
        unsigned long discont_pages = 0;
        unsigned long discont_blocks = 0;
        int i;

        if (nr_pages == 0)
                return;

        lprocfs_oh_tally_log2(&filter->fo_filter_stats.hist[BRW_R_PAGES + wr],
                              nr_pages);
        lprocfs_oh_tally_log2(&fed->fed_brw_stats.hist[BRW_R_PAGES + wr],
                              nr_pages);
        if (exp->exp_nid_stats && exp->exp_nid_stats->nid_brw_stats)
                lprocfs_oh_tally_log2(&exp->exp_nid_stats->nid_brw_stats->hist[BRW_W_PAGES + wr],
                                      nr_pages);

        while (nr_pages-- > 0) {
                if (last_page && (*pages)->index != (last_page->index + 1))
                        discont_pages++;
                last_page = *pages;
                pages++;
                for (i = 0; i < blocks_per_page; i++) {
                        if (last_block && *blocks != (*last_block + 1))
                                discont_blocks++;
                        last_block = blocks++;
                }
        }

        lprocfs_oh_tally(&filter->fo_filter_stats.hist[BRW_R_DISCONT_PAGES +wr],
                         discont_pages);
        lprocfs_oh_tally(&fed->fed_brw_stats.hist[BRW_R_DISCONT_PAGES + wr],
                         discont_pages);
        lprocfs_oh_tally(&filter->fo_filter_stats.hist[BRW_R_DISCONT_BLOCKS+wr],
                         discont_blocks);
        lprocfs_oh_tally(&fed->fed_brw_stats.hist[BRW_R_DISCONT_BLOCKS + wr],
                         discont_blocks);

        if (exp->exp_nid_stats && exp->exp_nid_stats->nid_brw_stats) {
                lprocfs_oh_tally_log2(&exp->exp_nid_stats->nid_brw_stats->hist[BRW_W_DISCONT_PAGES + wr],
                                      discont_pages);
                lprocfs_oh_tally_log2(&exp->exp_nid_stats->nid_brw_stats->hist[BRW_W_DISCONT_BLOCKS + wr],
                                      discont_blocks);
        }
}

#define pct(a,b) (b ? a * 100 / b : 0)

static void display_brw_stats(struct seq_file *seq, char *name, char *units,
        struct obd_histogram *read, struct obd_histogram *write, int log2)
{
        unsigned long read_tot, write_tot, r, w, read_cum = 0, write_cum = 0;
        int i;

        seq_printf(seq, "\n%26s read      |     write\n", " ");
        seq_printf(seq, "%-22s %-5s %% cum %% |  %-5s %% cum %%\n", 
                   name, units, units);

        read_tot = lprocfs_oh_sum(read);
        write_tot = lprocfs_oh_sum(write);
        for (i = 0; i < OBD_HIST_MAX; i++) {
                r = read->oh_buckets[i];
                w = write->oh_buckets[i];
                read_cum += r;
                write_cum += w;
                if (read_cum == 0 && write_cum == 0)
                        continue;

                if (!log2) 
                        seq_printf(seq, "%u", i);
                else if (i < 10)
                        seq_printf(seq, "%u", 1<<i);
                else if (i < 20)
                        seq_printf(seq, "%uK", 1<<(i-10));
                else
                        seq_printf(seq, "%uM", 1<<(i-20));

                seq_printf(seq, ":\t\t%10lu %3lu %3lu   | %4lu %3lu %3lu\n",
                           r, pct(r, read_tot), pct(read_cum, read_tot), 
                           w, pct(w, write_tot), pct(write_cum, write_tot));

                if (read_cum == read_tot && write_cum == write_tot)
                        break;
        }
}

static void brw_stats_show(struct seq_file *seq, struct brw_stats *brw_stats)
{
        struct timeval now;

        /* this sampling races with updates */
        do_gettimeofday(&now);
        seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
                   now.tv_sec, now.tv_usec);

        display_brw_stats(seq, "pages per bulk r/w", "rpcs",
                          &brw_stats->hist[BRW_R_PAGES],
                          &brw_stats->hist[BRW_W_PAGES], 1);

        display_brw_stats(seq, "discontiguous pages", "rpcs",
                          &brw_stats->hist[BRW_R_DISCONT_PAGES],
                          &brw_stats->hist[BRW_W_DISCONT_PAGES], 0);

        display_brw_stats(seq, "discontiguous blocks", "rpcs",
                          &brw_stats->hist[BRW_R_DISCONT_BLOCKS],
                          &brw_stats->hist[BRW_W_DISCONT_BLOCKS], 0);

        display_brw_stats(seq, "disk fragmented I/Os", "ios",
                          &brw_stats->hist[BRW_R_DIO_FRAGS],
                          &brw_stats->hist[BRW_W_DIO_FRAGS], 0);

#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
        display_brw_stats(seq, "disk I/Os in flight", "ios",
                          &brw_stats->hist[BRW_R_RPC_HIST],
                          &brw_stats->hist[BRW_W_RPC_HIST], 0);

        {
                char title[24];
                sprintf(title, "I/O time (1/%ds)", HZ);
                display_brw_stats(seq, title, "ios",
                                  &brw_stats->hist[BRW_R_IO_TIME],
                                  &brw_stats->hist[BRW_W_IO_TIME], 1);
        }

        display_brw_stats(seq, "disk I/O size", "ios",
                          &brw_stats->hist[BRW_R_DISK_IOSIZE],
                          &brw_stats->hist[BRW_W_DISK_IOSIZE], 1);
#endif
}

#undef pct

static int filter_brw_stats_seq_show(struct seq_file *seq, void *v)
{
        struct obd_device *dev = seq->private;
        struct filter_obd *filter = &dev->u.filter;

        brw_stats_show(seq, &filter->fo_filter_stats);

        return 0;
}

static ssize_t filter_brw_stats_seq_write(struct file *file, const char *buf,
                                       size_t len, loff_t *off)
{
        struct seq_file *seq = file->private_data;
        struct obd_device *dev = seq->private;
        struct filter_obd *filter = &dev->u.filter;
        int i;

        for (i = 0; i < BRW_LAST; i++)
                lprocfs_oh_clear(&filter->fo_filter_stats.hist[i]);

        return len;
}

LPROC_SEQ_FOPS(filter_brw_stats);

int lproc_filter_attach_seqstat(struct obd_device *dev)
{
        return lprocfs_obd_seq_create(dev, "brw_stats", 0444,
                                      &filter_brw_stats_fops, dev);
}

static int filter_per_export_stats_seq_show(struct seq_file *seq, void *v)
{
        struct filter_export_data *fed = seq->private;

        brw_stats_show(seq, &fed->fed_brw_stats);

        return 0;
}

static ssize_t filter_per_export_stats_seq_write(struct file *file,
                                       const char *buf, size_t len, loff_t *off)
{
        struct seq_file *seq = file->private_data;
        struct filter_export_data *fed = seq->private;
        int i;

        for (i = 0; i < BRW_LAST; i++)
                lprocfs_oh_clear(&fed->fed_brw_stats.hist[i]);

        return len;
}

LPROC_SEQ_FOPS(filter_per_export_stats);

void lprocfs_filter_init_vars(struct lprocfs_static_vars *lvars)
{
    lvars->module_vars  = lprocfs_filter_module_vars;
    lvars->obd_vars     = lprocfs_filter_obd_vars;
}

static int filter_per_nid_stats_seq_show(struct seq_file *seq, void *v)
{
        nid_stat_t *tmp = seq->private;

        if (tmp->nid_brw_stats)
                brw_stats_show(seq, tmp->nid_brw_stats);

        return 0;
}

static ssize_t filter_per_nid_stats_seq_write(struct file *file,
                                              const char *buf, size_t len,
                                              loff_t *off)
{
        struct seq_file *seq = file->private_data;
        nid_stat_t *tmp = seq->private;
        int i;

        if (tmp->nid_brw_stats)
                for (i = 0; i < BRW_LAST; i++)
                        lprocfs_oh_clear(&tmp->nid_brw_stats->hist[i]);

        return len;
}

LPROC_SEQ_FOPS(filter_per_nid_stats);

#endif /* LPROCFS */