diff options
Diffstat (limited to 'drivers/gator/driver/gator_events_meminfo.c')
| -rw-r--r-- | drivers/gator/driver/gator_events_meminfo.c | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/drivers/gator/driver/gator_events_meminfo.c b/drivers/gator/driver/gator_events_meminfo.c deleted file mode 100644 index c763634ef53..00000000000 --- a/drivers/gator/driver/gator_events_meminfo.c +++ /dev/null @@ -1,225 +0,0 @@ -/** - * Copyright (C) ARM Limited 2010-2012. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - */ - -#include "gator.h" -#include <linux/workqueue.h> -#include <trace/events/kmem.h> - -#define MEMINFO_MEMFREE 0 -#define MEMINFO_MEMUSED 1 -#define MEMINFO_BUFFERRAM 2 -#define MEMINFO_TOTAL 3 - -static ulong meminfo_global_enabled; -static ulong meminfo_enabled[MEMINFO_TOTAL]; -static ulong meminfo_key[MEMINFO_TOTAL]; -static unsigned long long meminfo_buffer[MEMINFO_TOTAL * 2]; -static int meminfo_length = 0; -static unsigned int mem_event = 0; -static bool new_data_avail; - -static void wq_sched_handler(struct work_struct *wsptr); - -DECLARE_WORK(work, wq_sched_handler); - -#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0) -GATOR_DEFINE_PROBE(mm_page_free_direct, TP_PROTO(struct page *page, unsigned int order)) { -#else -GATOR_DEFINE_PROBE(mm_page_free, TP_PROTO(struct page *page, unsigned int order)) { -#endif - mem_event++; -} - -#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0) -GATOR_DEFINE_PROBE(mm_pagevec_free, TP_PROTO(struct page *page, int cold)) { -#else -GATOR_DEFINE_PROBE(mm_page_free_batched, TP_PROTO(struct page *page, int cold)) { -#endif - mem_event++; -} - -GATOR_DEFINE_PROBE(mm_page_alloc, TP_PROTO(struct page *page, unsigned int order, gfp_t gfp_flags, int migratetype)) { - mem_event++; -} - -static int gator_events_meminfo_create_files(struct super_block *sb, struct dentry *root) -{ - struct dentry *dir; - int i; - - for (i = 0; i < MEMINFO_TOTAL; i++) { - switch (i) { - case MEMINFO_MEMFREE: - dir = gatorfs_mkdir(sb, root, "Linux_meminfo_memfree"); - break; - case MEMINFO_MEMUSED: - dir = gatorfs_mkdir(sb, root, "Linux_meminfo_memused"); - break; - case MEMINFO_BUFFERRAM: - dir = gatorfs_mkdir(sb, root, "Linux_meminfo_bufferram"); - break; - default: - return -1; - } - if (!dir) { - return -1; - } - gatorfs_create_ulong(sb, dir, "enabled", &meminfo_enabled[i]); - gatorfs_create_ro_ulong(sb, dir, "key", &meminfo_key[i]); - } - - return 0; -} - -static int gator_events_meminfo_start(void) -{ - int i; - - new_data_avail = true; - for (i = 0; i < MEMINFO_TOTAL; i++) { - if (meminfo_enabled[i]) { - meminfo_global_enabled = 1; - } - } - - if (meminfo_global_enabled == 0) - return 0; - -#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0) - if (GATOR_REGISTER_TRACE(mm_page_free_direct)) -#else - if (GATOR_REGISTER_TRACE(mm_page_free)) -#endif - goto mm_page_free_exit; -#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0) - if (GATOR_REGISTER_TRACE(mm_pagevec_free)) -#else - if (GATOR_REGISTER_TRACE(mm_page_free_batched)) -#endif - goto mm_page_free_batched_exit; - if (GATOR_REGISTER_TRACE(mm_page_alloc)) - goto mm_page_alloc_exit; - - return 0; - -mm_page_alloc_exit: -#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0) - GATOR_UNREGISTER_TRACE(mm_pagevec_free); -#else - GATOR_UNREGISTER_TRACE(mm_page_free_batched); -#endif -mm_page_free_batched_exit: -#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0) - GATOR_UNREGISTER_TRACE(mm_page_free_direct); -#else - GATOR_UNREGISTER_TRACE(mm_page_free); -#endif -mm_page_free_exit: - return -1; -} - -static void gator_events_meminfo_stop(void) -{ - int i; - - if (meminfo_global_enabled) { -#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0) - GATOR_UNREGISTER_TRACE(mm_page_free_direct); - GATOR_UNREGISTER_TRACE(mm_pagevec_free); -#else - GATOR_UNREGISTER_TRACE(mm_page_free); - GATOR_UNREGISTER_TRACE(mm_page_free_batched); -#endif - GATOR_UNREGISTER_TRACE(mm_page_alloc); - } - - meminfo_global_enabled = 0; - for (i = 0; i < MEMINFO_TOTAL; i++) { - meminfo_enabled[i] = 0; - } -} - -// Must be run in a work queue as the kernel function si_meminfo() can sleep -static void wq_sched_handler(struct work_struct *wsptr) -{ - struct sysinfo info; - int i, len; - unsigned long long value; - - meminfo_length = len = 0; - - si_meminfo(&info); - for (i = 0; i < MEMINFO_TOTAL; i++) { - if (meminfo_enabled[i]) { - switch (i) { - case MEMINFO_MEMFREE: - value = info.freeram * PAGE_SIZE; - break; - case MEMINFO_MEMUSED: - value = (info.totalram - info.freeram) * PAGE_SIZE; - break; - case MEMINFO_BUFFERRAM: - value = info.bufferram * PAGE_SIZE; - break; - default: - value = 0; - break; - } - meminfo_buffer[len++] = (unsigned long long)meminfo_key[i]; - meminfo_buffer[len++] = value; - } - } - - meminfo_length = len; - new_data_avail = true; -} - -static int gator_events_meminfo_read(long long **buffer) -{ - static unsigned int last_mem_event = 0; - - if (smp_processor_id() || !meminfo_global_enabled) - return 0; - - if (last_mem_event != mem_event) { - last_mem_event = mem_event; - schedule_work(&work); - } - - if (!new_data_avail) - return 0; - - new_data_avail = false; - - if (buffer) - *buffer = meminfo_buffer; - - return meminfo_length; -} - -static struct gator_interface gator_events_meminfo_interface = { - .create_files = gator_events_meminfo_create_files, - .start = gator_events_meminfo_start, - .stop = gator_events_meminfo_stop, - .read64 = gator_events_meminfo_read, -}; - -int gator_events_meminfo_init(void) -{ - int i; - - meminfo_global_enabled = 0; - for (i = 0; i < MEMINFO_TOTAL; i++) { - meminfo_enabled[i] = 0; - meminfo_key[i] = gator_events_get_key(); - } - - return gator_events_install(&gator_events_meminfo_interface); -} -gator_events_init(gator_events_meminfo_init); |