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Message-ID: <5730322E.6020402@hisilicon.com>
Date: Mon, 9 May 2016 14:46:06 +0800
From: Chen Feng <puck.chen@...ilicon.com>
To: <saberlily.xia@...ilicon.com>, <gregkh@...uxfoundation.org>,
<arve@...roid.com>, <riandrews@...roid.com>, <labbott@...hat.com>,
<paul.gortmaker@...driver.com>, <bmarsh94@...il.com>,
<devel@...verdev.osuosl.org>, <linux-kernel@...r.kernel.org>
CC: <xuyiping@...ilicon.com>, <suzhuangluan@...ilicon.com>,
<dan.zhao@...ilicon.com>, <linuxarm@...wei.com>,
<puck.chen@...mail.com>
Subject: Re: [PATCH] ION: Sys_heap: Add cached pool to spead up cached buffer
alloc
Sorry,the order here is not right, please ignore this patch.
I will RESEND it.
On 2016/5/9 14:24, Chen Feng wrote:
> Add ion cached pool in system heap.
>
> Signed-off-by: Chen Feng <puck.chen@...ilicon.com>
> Signed-off-by: Xia Qing <saberlily.xia@...ilicon.com>
> ---
> drivers/staging/android/ion/ion_system_heap.c | 120 +++++++++++++++++---------
> 1 file changed, 79 insertions(+), 41 deletions(-)
>
> diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c
> index b69dfc7..5b7e5b0 100644
> --- a/drivers/staging/android/ion/ion_system_heap.c
> +++ b/drivers/staging/android/ion/ion_system_heap.c
> @@ -49,7 +49,8 @@ static inline unsigned int order_to_size(int order)
>
> struct ion_system_heap {
> struct ion_heap heap;
> - struct ion_page_pool *pools[0];
> + struct ion_page_pool *uncached_pools[0];
> + struct ion_page_pool *cached_pools[0];
> };
>
> static struct page *alloc_buffer_page(struct ion_system_heap *heap,
> @@ -57,39 +58,36 @@ static struct page *alloc_buffer_page(struct ion_system_heap *heap,
> unsigned long order)
> {
> bool cached = ion_buffer_cached(buffer);
> - struct ion_page_pool *pool = heap->pools[order_to_index(order)];
> + struct ion_page_pool *pool;
> struct page *page;
>
> - if (!cached) {
> - page = ion_page_pool_alloc(pool);
> - } else {
> - gfp_t gfp_flags = low_order_gfp_flags;
> -
> - if (order > 4)
> - gfp_flags = high_order_gfp_flags;
> - page = alloc_pages(gfp_flags | __GFP_COMP, order);
> - if (!page)
> - return NULL;
> - ion_pages_sync_for_device(NULL, page, PAGE_SIZE << order,
> - DMA_BIDIRECTIONAL);
> - }
> + if (!cached)
> + pool = heap->uncached_pools[order_to_index(order)];
> + else
> + pool = heap->cached_pools[order_to_index(order)];
>
> + page = ion_page_pool_alloc(pool);
> return page;
> }
>
> static void free_buffer_page(struct ion_system_heap *heap,
> struct ion_buffer *buffer, struct page *page)
> {
> + struct ion_page_pool *pool;
> unsigned int order = compound_order(page);
> bool cached = ion_buffer_cached(buffer);
>
> - if (!cached && !(buffer->private_flags & ION_PRIV_FLAG_SHRINKER_FREE)) {
> - struct ion_page_pool *pool = heap->pools[order_to_index(order)];
> -
> - ion_page_pool_free(pool, page);
> - } else {
> + if (buffer->private_flags & ION_PRIV_FLAG_SHRINKER_FREE) {
> __free_pages(page, order);
> + return;
> }
> +
> + if (!cached)
> + pool = heap->uncached_pools[order_to_index(order)];
> + else
> + pool = heap->cached_pools[order_to_index(order)];
> +
> + ion_page_pool_free(pool, page);
> }
>
>
> @@ -224,9 +222,11 @@ static int ion_system_heap_shrink(struct ion_heap *heap, gfp_t gfp_mask,
> only_scan = 1;
>
> for (i = 0; i < num_orders; i++) {
> - struct ion_page_pool *pool = sys_heap->pools[i];
> + struct ion_page_pool *pool = sys_heap->uncached_pools[i];
>
> - nr_freed = ion_page_pool_shrink(pool, gfp_mask, nr_to_scan);
> + nr_freed += ion_page_pool_shrink(pool, gfp_mask, nr_to_scan);
> + pool = sys_heap->cached_pools[i];
> + nr_freed += ion_page_pool_shrink(pool, gfp_mask, nr_to_scan);
> nr_total += nr_freed;
>
> if (!only_scan) {
> @@ -259,27 +259,69 @@ static int ion_system_heap_debug_show(struct ion_heap *heap, struct seq_file *s,
> struct ion_system_heap,
> heap);
> int i;
> + struct ion_page_pool *pool;
>
> for (i = 0; i < num_orders; i++) {
> - struct ion_page_pool *pool = sys_heap->pools[i];
> + pool = sys_heap->uncached_pools[i];
>
> - seq_printf(s, "%d order %u highmem pages in pool = %lu total\n",
> + seq_printf(s, "%d order %u highmem pages uncached %lu total\n",
> pool->high_count, pool->order,
> (PAGE_SIZE << pool->order) * pool->high_count);
> - seq_printf(s, "%d order %u lowmem pages in pool = %lu total\n",
> + seq_printf(s, "%d order %u lowmem pages uncached %lu total\n",
> pool->low_count, pool->order,
> (PAGE_SIZE << pool->order) * pool->low_count);
> }
> +
> + for (i = 0; i < num_orders; i++) {
> + pool = sys_heap->cached_pools[i];
> +
> + seq_printf(s, "%d order %u highmem pages cached %lu total\n",
> + pool->high_count, pool->order,
> + (PAGE_SIZE << pool->order) * pool->high_count);
> + seq_printf(s, "%d order %u lowmem pages cached %lu total\n",
> + pool->low_count, pool->order,
> + (PAGE_SIZE << pool->order) * pool->low_count);
> + }
> + return 0;
> +}
> +
> +static void ion_system_heap_destroy_pools(struct ion_page_pool **pools)
> +{
> + int i;
> +
> + for (i = 0; i < num_orders; i++)
> + if (pools[i])
> + ion_page_pool_destroy(pools[i]);
> +}
> +
> +static int ion_system_heap_create_pools(struct ion_page_pool **pools)
> +{
> + int i;
> + gfp_t gfp_flags = low_order_gfp_flags;
> +
> + for (i = 0; i < num_orders; i++) {
> + struct ion_page_pool *pool;
> +
> + if (orders[i])
> + gfp_flags = high_order_gfp_flags;
> +
> + pool = ion_page_pool_create(gfp_flags, orders[i]);
> + if (!pool)
> + goto err_create_pool;
> + pools[i] = pool;
> + }
> return 0;
> +err_create_pool:
> + ion_system_heap_destroy_pools(pools);
> + return -ENOMEM;
> }
>
> struct ion_heap *ion_system_heap_create(struct ion_platform_heap *unused)
> {
> struct ion_system_heap *heap;
> - int i;
>
> heap = kzalloc(sizeof(struct ion_system_heap) +
> - sizeof(struct ion_page_pool *) * num_orders,
> + sizeof(struct ion_page_pool *) * num_orders * 2,
> GFP_KERNEL);
> if (!heap)
> return ERR_PTR(-ENOMEM);
> @@ -287,24 +329,18 @@ struct ion_heap *ion_system_heap_create(struct ion_platform_heap *unused)
> heap->heap.type = ION_HEAP_TYPE_SYSTEM;
> heap->heap.flags = ION_HEAP_FLAG_DEFER_FREE;
>
> - for (i = 0; i < num_orders; i++) {
> - struct ion_page_pool *pool;
> - gfp_t gfp_flags = low_order_gfp_flags;
> + if (ion_system_heap_create_pools(heap->uncached_pools))
> + goto destroy_pools;
>
> - if (orders[i] > 4)
> - gfp_flags = high_order_gfp_flags;
> - pool = ion_page_pool_create(gfp_flags, orders[i]);
> - if (!pool)
> - goto destroy_pools;
> - heap->pools[i] = pool;
> - }
> + if (ion_system_heap_create_pools(heap->cached_pools))
> + goto destroy_uncached_pools;
>
> heap->heap.debug_show = ion_system_heap_debug_show;
> return &heap->heap;
>
> +destroy_uncached_pools:
> + ion_system_heap_destroy_pools(heap->uncached_pools);
> destroy_pools:
> - while (i--)
> - ion_page_pool_destroy(heap->pools[i]);
> kfree(heap);
> return ERR_PTR(-ENOMEM);
> }
> @@ -316,8 +352,10 @@ void ion_system_heap_destroy(struct ion_heap *heap)
> heap);
> int i;
>
> - for (i = 0; i < num_orders; i++)
> - ion_page_pool_destroy(sys_heap->pools[i]);
> + for (i = 0; i < num_orders; i++) {
> + ion_page_pool_destroy(sys_heap->uncached_pools[i]);
> + ion_page_pool_destroy(sys_heap->uncached_pools[i]);
> + }
> kfree(sys_heap);
> }
>
>
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