cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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stats.c (2969B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/* FS-Cache statistics
      3 *
      4 * Copyright (C) 2021 Red Hat, Inc. All Rights Reserved.
      5 * Written by David Howells (dhowells@redhat.com)
      6 */
      7
      8#define FSCACHE_DEBUG_LEVEL CACHE
      9#include <linux/proc_fs.h>
     10#include <linux/seq_file.h>
     11#include "internal.h"
     12
     13/*
     14 * operation counters
     15 */
     16atomic_t fscache_n_volumes;
     17atomic_t fscache_n_volumes_collision;
     18atomic_t fscache_n_volumes_nomem;
     19atomic_t fscache_n_cookies;
     20atomic_t fscache_n_cookies_lru;
     21atomic_t fscache_n_cookies_lru_expired;
     22atomic_t fscache_n_cookies_lru_removed;
     23atomic_t fscache_n_cookies_lru_dropped;
     24
     25atomic_t fscache_n_acquires;
     26atomic_t fscache_n_acquires_ok;
     27atomic_t fscache_n_acquires_oom;
     28
     29atomic_t fscache_n_invalidates;
     30
     31atomic_t fscache_n_updates;
     32EXPORT_SYMBOL(fscache_n_updates);
     33
     34atomic_t fscache_n_relinquishes;
     35atomic_t fscache_n_relinquishes_retire;
     36atomic_t fscache_n_relinquishes_dropped;
     37
     38atomic_t fscache_n_resizes;
     39atomic_t fscache_n_resizes_null;
     40
     41atomic_t fscache_n_read;
     42EXPORT_SYMBOL(fscache_n_read);
     43atomic_t fscache_n_write;
     44EXPORT_SYMBOL(fscache_n_write);
     45atomic_t fscache_n_no_write_space;
     46EXPORT_SYMBOL(fscache_n_no_write_space);
     47atomic_t fscache_n_no_create_space;
     48EXPORT_SYMBOL(fscache_n_no_create_space);
     49atomic_t fscache_n_culled;
     50EXPORT_SYMBOL(fscache_n_culled);
     51
     52/*
     53 * display the general statistics
     54 */
     55int fscache_stats_show(struct seq_file *m, void *v)
     56{
     57	seq_puts(m, "FS-Cache statistics\n");
     58	seq_printf(m, "Cookies: n=%d v=%d vcol=%u voom=%u\n",
     59		   atomic_read(&fscache_n_cookies),
     60		   atomic_read(&fscache_n_volumes),
     61		   atomic_read(&fscache_n_volumes_collision),
     62		   atomic_read(&fscache_n_volumes_nomem)
     63		   );
     64
     65	seq_printf(m, "Acquire: n=%u ok=%u oom=%u\n",
     66		   atomic_read(&fscache_n_acquires),
     67		   atomic_read(&fscache_n_acquires_ok),
     68		   atomic_read(&fscache_n_acquires_oom));
     69
     70	seq_printf(m, "LRU    : n=%u exp=%u rmv=%u drp=%u at=%ld\n",
     71		   atomic_read(&fscache_n_cookies_lru),
     72		   atomic_read(&fscache_n_cookies_lru_expired),
     73		   atomic_read(&fscache_n_cookies_lru_removed),
     74		   atomic_read(&fscache_n_cookies_lru_dropped),
     75		   timer_pending(&fscache_cookie_lru_timer) ?
     76		   fscache_cookie_lru_timer.expires - jiffies : 0);
     77
     78	seq_printf(m, "Invals : n=%u\n",
     79		   atomic_read(&fscache_n_invalidates));
     80
     81	seq_printf(m, "Updates: n=%u rsz=%u rsn=%u\n",
     82		   atomic_read(&fscache_n_updates),
     83		   atomic_read(&fscache_n_resizes),
     84		   atomic_read(&fscache_n_resizes_null));
     85
     86	seq_printf(m, "Relinqs: n=%u rtr=%u drop=%u\n",
     87		   atomic_read(&fscache_n_relinquishes),
     88		   atomic_read(&fscache_n_relinquishes_retire),
     89		   atomic_read(&fscache_n_relinquishes_dropped));
     90
     91	seq_printf(m, "NoSpace: nwr=%u ncr=%u cull=%u\n",
     92		   atomic_read(&fscache_n_no_write_space),
     93		   atomic_read(&fscache_n_no_create_space),
     94		   atomic_read(&fscache_n_culled));
     95
     96	seq_printf(m, "IO     : rd=%u wr=%u\n",
     97		   atomic_read(&fscache_n_read),
     98		   atomic_read(&fscache_n_write));
     99
    100	netfs_stats_show(m);
    101	return 0;
    102}