Heap refinement Part 4 -- zones merged #4747

keyonjie · 2021-09-10T12:29:33Z

Merge zones SYSTEM_SHARED and RUNTIME_SHARED to the BUFFER zone, and change the corresponding callers.

RanderWang · 2021-09-13T08:53:49Z

src/lib/alloc.c

if SOF_MEM_FLAG_COHERENT == 1, then we prefer uncache addr ? the flag name is confusing. Or named SOF_MEM_FLAG_UNCACHE

RanderWang · 2021-09-13T08:56:27Z

Kconfig.xtos-dbg

means uncached buffer ? I know cache coherence but what is coherence buffer ?

Yes, so coherent (a generic term) means uncache (coherent) memory on Intel HW.

gkbldcig · 2021-09-16T23:22:28Z

Can one of the admins verify this patch?

keyonjie · 2021-10-10T00:36:44Z

@lgirdwood the CI result is becoming better now.
only fuzzy IPC and test bench issues looks valid to me, will fix them soon.

Update to initiaze the new allocated buffers to all 0s by rballoc_align() helper. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

The rballoc_align() helper will initialize new allocated buffers with 0s, update comments to document this. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

The fuzzy IPC testing reports there is memory leak if dma_trace_config IPC is sent multiple times, we should just return if the DMA trace buffer is already allocated, to avoid allocating new buffers and the leakage of the old buffers. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

When freeing blocks, we need to perform writeback and invalidate to the dirty cache lines, otherwise, they will be evicted from the cache at some point in the future, which will break the usage of the same memory region from another DSP core. Introduce a free_ptr to make sure the original 'ptr' is not changed, so we can use it for this wb/inv operation. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

Change the usage of the runtime_shared zone to the buffer zone, and the calling of rmalloc/rzalloc() from runtime_shared zone to rballoc() with SOF_MEM_ZONE_RUNTIME_SHARED flag. Change the rballoc to zeroing allocated buffers to meet the rzalloc() usage also. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

Change to use rballoc(SOF_MEM_FLAG_COHERENT,) one now. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

The mux cd could be bigger than 1KB, change to use rballoc() for allocating the buffer, to try to ensure the allocation is success. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

We are allocating more buffers from BUFFER zone now, change size of ZONEs to reflect that. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

Change the usage of the system_shared zone to the buffer zone, and the calling of rmalloc/rzalloc() from system_shared zone to rballoc() with SOF_MEM_ZONE_RUNTIME_SHARED flag. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

We are allocating more buffers from BUFFER zone now, change size of ZONEs to reflect that. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

Since there is no any usage of the runtime_shared zone now, we can remove it thoroughly now. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

Since there is no any usage of the system_shared zone now, we can remove it thoroughly now. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

Align to the new heap memory map and allocator, SYSTEM_SHARED and RUNTIME_SHARED zones are removed. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

Now buffer zone should have bigger size, and runtime zone is smaller. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

lyakh

I think the general idea of reducing the number of zones is good, but I don't think using rballoc() for all allocations is good. Could we do the opposite - remove rballoc() and use rmalloc() for all allocations?

lyakh · 2021-10-11T07:30:11Z

src/platform/library/lib/alloc.c

 		    uint32_t alignment)
 {
-	return malloc(bytes);
+	return calloc(bytes, 1);


sorry, why? I'm against this. The user can decide if they need to initialise the buffer. Often enough the whole of the buffer will be overwritten anyway. This would just waste cycles.

sorry, why? I'm against this. The user can decide if they need to initialise the buffer. Often enough the whole of the buffer will be overwritten anyway. This would just waste cycles.

this is good point, this is for alignment the testbench to the existed allocator only. In subsequent cleanup series, I will unify the allocation helpers, e.g. to remove the rballoc() thoroughly and use rmalloc()/rzalloc() correspondingly.

Can we align this with Zephyr, i.e. if Zephyr clears then we should too, if Zephyr does not clear then we clear in the caller code.

@lgirdwood are you planning to keep wrappers around Zephyr heap API or you want to use them directly? I think we should have wrappers. Firstly, they only have two kinds of allocations: aligned and unaligned. Secondly, their allocators take a heap instance as an argument, which applications commonly have no idea about. So, no zeroing (calloc()), no cache-coherency. And if we do have wrappers - let's design them and move towards that design.

lyakh · 2021-10-11T07:33:35Z

src/trace/dma-trace.c


+	/* return if already initialized */
+	if (buffer->addr)
+		return 0;


shouldn't dma_trace_enable() return immediately in this case too?

shouldn't dma_trace_enable() return immediately in this case too?

Tried that but if failed a lot according to CI result. This is only to fix the fuzzy test failure reported, may be it should be split out as a separated PR.

lyakh · 2021-10-11T07:38:54Z

src/lib/alloc.c

+	 * future, on top of the memory region now being used for
+	 * different purposes on another core.
+	 */
+	dcache_writeback_invalidate_region(ptr, block_map->block_size * hdr->size);


why writing it back? If memory is freed, its contents aren't needed any more? But anyway I guess this is superseded by #4851

why writing it back? If memory is freed, its contents aren't needed any more? But anyway I guess this is superseded by #4851

yes, it was inspired by Andy's #4851 but this is for XTOS, doing DHWBI (Data-cache hit writeback invalidate) looks like a better operation for the memory freeing to me, it follows the willing that the last changed content flushed back to memory.

sorry, not following. "Better" must have an explanation. Why write it back? Nobody needs it.

lyakh · 2021-10-11T07:41:18Z

src/arch/xtensa/lib/cpu.c

 	uint8_t *dynamic_vectors;

-	dynamic_vectors = rzalloc(SOF_MEM_ZONE_RUNTIME_SHARED, 0, 0, SOF_DYNAMIC_VECTORS_SIZE);
+	dynamic_vectors = rballoc(SOF_MEM_FLAG_COHERENT, 0, SOF_DYNAMIC_VECTORS_SIZE);


would be good to explain why. Just because it's a relatively large allocation of 1K?

lyakh · 2021-10-11T07:42:29Z

src/audio/buffer.c


 	/* allocate new buffer */
-	buffer = rzalloc(SOF_MEM_ZONE_RUNTIME_SHARED, 0, SOF_MEM_CAPS_RAM,
+	buffer = rballoc(SOF_MEM_FLAG_COHERENT, SOF_MEM_CAPS_RAM,


sorry, I'm totally confused now. I thought rballoc() was only for audio buffers. Then some other uses cropped in. Now you're suggesting even more.

sorry, I'm totally confused now. I thought rballoc() was only for audio buffers. Then some other uses cropped in. Now you're suggesting even more.

It is just replacement here, as we will remove the RUNTIME_SHARED zone thoroughly in the subsequent commits.

The naming is not so important to me, for the allocator, it doesn't know about what the required buffer will be used for, @lgirdwood asked me to do a "Part 5" to unify the rxxalloc() helpers, at that time we will have only e.g. rmalloc() and rzalloc(), and the allocator internal will decide where (which zone) it will allocate the required buffer on.

@lyakh direction of travel is simplification of allocator to align with Zephyr

lgirdwood

Lets align the clear/no clear with Zephyr.

lgirdwood · 2021-10-13T13:44:51Z

src/platform/library/lib/alloc.c

 		    uint32_t alignment)
 {
-	return malloc(bytes);
+	return calloc(bytes, 1);


Can we align this with Zephyr, i.e. if Zephyr clears then we should too, if Zephyr does not clear then we clear in the caller code.

lgirdwood · 2021-10-15T14:03:05Z

@keyonjie @lyakh lets simplify further in alloc.c/h and in wrapper.c and take us closer to POSIX here (which will also align with Zephyr as updates are merged). Can we consolidate our memory APIs to

/* reuse current caps */
#define SOF_MEM_CAPS_RAM			(1 << 0)
#define SOF_MEM_CAPS_ROM			(1 << 1)
#define SOF_MEM_CAPS_EXT			(1 << 2) /**< external */
#define SOF_MEM_CAPS_LP			(1 << 3) /**< low power */
#define SOF_MEM_CAPS_HP			(1 << 4) /**< high performance */
#define SOF_MEM_CAPS_DMA			(1 << 5) /**< DMA'able */
#define SOF_MEM_CAPS_CACHE			(1 << 6) /**< cacheable */
#define SOF_MEM_CAPS_EXEC			(1 << 7) /**< executable */

void *rmalloc(size_t size, uint32_t caps);
void rfree(void *ptr);
void *rcalloc(size_t nmemb, size_t size, uint32_t caps);
void *rrealloc(void *ptr, size_t size, uint32_t caps);

This means we can delete enum mem_zone

keyonjie · 2021-10-18T07:33:54Z

void *rmalloc(size_t size, uint32_t caps);
void rfree(void *ptr);
void *rcalloc(size_t nmemb, size_t size, uint32_t caps);
void *rrealloc(void *ptr, size_t size, uint32_t caps);
This means we can delete `enum mem_zone`

Sure, maybe "rcalloc" -> "rzalloc".

By the way, should the allocator always return uncached address as we don't have flag param for those APIs?

lgirdwood · 2021-10-18T15:04:38Z

void *rmalloc(size_t size, uint32_t caps);
void rfree(void *ptr);
void *rcalloc(size_t nmemb, size_t size, uint32_t caps);
void *rrealloc(void *ptr, size_t size, uint32_t caps);
This means we can delete `enum mem_zone`
Sure, maybe "rcalloc" -> "rzalloc".

Yep, that's fine.

By the way, should the allocator always return uncached address as we don't have flag param for those APIs?

Look here

#define SOF_MEM_CAPS_CACHE			(1 << 6) /**< cacheable */

We already have a cached flag, so should use it. Btw, @kv2019i has now aligned Zephyr to use same cache/uncache mapping now as xtos so your updates should align on both xtos and zephyr :)

keyonjie · 2021-10-19T07:18:06Z

CAPS_CACHE

Hi @lgirdwood let me try to clarify it.

Now the CAPS_CACHE is somewhat confusion, the flag doesn't mean anything, it is listed in all zones in memory.c.

And the usage of it from the topology don't tell any difference wrt this flag:

dnl Memory capabilities for different buffer types on Tigerlake
define(`PLATFORM_DAI_MEM_CAP',
        MEMCAPS(MEM_CAP_RAM, MEM_CAP_DMA, MEM_CAP_CACHE, MEM_CAP_HP))
define(`PLATFORM_HOST_MEM_CAP',
        MEMCAPS(MEM_CAP_RAM, MEM_CAP_DMA, MEM_CAP_CACHE, MEM_CAP_HP))
define(`PLATFORM_PASS_MEM_CAP',
        MEMCAPS(MEM_CAP_RAM, MEM_CAP_DMA, MEM_CAP_CACHE, MEM_CAP_HP))
define(`PLATFORM_COMP_MEM_CAP', MEMCAPS(MEM_CAP_RAM, MEM_CAP_CACHE))

So maybe we can add a new flag e.g. MEM_CAP_DIRECT_ADDRESS if we want to use it to denote if the zone is uncached address used only, but for this kind of zone, do we intend to return cached address/ptr to the user in allocation APIs?

lgirdwood · 2021-10-19T13:26:24Z

And the usage of it from the topology don't tell any difference wrt this flag:
dnl Memory capabilities for different buffer types on Tigerlake
define(`PLATFORM_DAI_MEM_CAP',
        MEMCAPS(MEM_CAP_RAM, MEM_CAP_DMA, MEM_CAP_CACHE, MEM_CAP_HP))
define(`PLATFORM_HOST_MEM_CAP',
        MEMCAPS(MEM_CAP_RAM, MEM_CAP_DMA, MEM_CAP_CACHE, MEM_CAP_HP))
define(`PLATFORM_PASS_MEM_CAP',
        MEMCAPS(MEM_CAP_RAM, MEM_CAP_DMA, MEM_CAP_CACHE, MEM_CAP_HP))
define(`PLATFORM_COMP_MEM_CAP', MEMCAPS(MEM_CAP_RAM, MEM_CAP_CACHE))
So maybe we can add a new flag e.g. MEM_CAP_DIRECT_ADDRESS if we want to use it to denote if the zone is uncached address used only, but for this kind of zone, do we intend to return cached address/ptr to the user in allocation APIs?

The point here is that API callers who pass SOF_MEM_CAPS_CACHE will get the cached address and those who don't pass it will get uncached.

keyonjie · 2021-10-21T05:51:09Z

So maybe we can add a new flag e.g. MEM_CAP_DIRECT_ADDRESS if we want to use it to denote if the zone is uncached address used only, but for this kind of zone, do we intend to return cached address/ptr to the user in allocation APIs?

The point here is that API callers who pass SOF_MEM_CAPS_CACHE will get the cached address and those who don't pass it will get uncached.

That's doable, if we are aligned on that, we might need to revisit all API callers as most of them are not following that at the moment, almost none of the caller uses SOF_MEM_CAPS_CACHE explicitly when they are asking for cached address except the audio buffer from the topoloies:

src/arch/xtensa/schedule/task.c:86:		ctx->stack_base = rballoc(0, SOF_MEM_CAPS_RAM,
src/audio/drc/drc.c:76:	state->pre_delay_buffers[0] = rballoc(0, SOF_MEM_CAPS_RAM, bytes_total);
src/audio/codec_adapter/codec_adapter.c:517:		codec->runtime_params = rballoc(0, SOF_MEM_CAPS_RAM, size);
src/audio/codec_adapter/codec/generic.c:43:		dst->data = rballoc(0, SOF_MEM_CAPS_RAM, size);
src/audio/codec_adapter/codec/generic.c:49:		dst->data = rballoc(0, SOF_MEM_CAPS_RAM, size);
src/audio/codec_adapter/codec/generic.c:151:		ptr = rballoc(0, SOF_MEM_CAPS_RAM, size);
src/audio/codec_adapter/codec/passthrough.c:29:	codec->cpd.in_buff = rballoc(0, SOF_MEM_CAPS_RAM, cd->period_bytes);
src/audio/codec_adapter/codec/passthrough.c:36:	codec->cpd.out_buff = rballoc(0, SOF_MEM_CAPS_RAM, cd->period_bytes);
src/audio/dai.c.rej:8:+	dd = rballoc(SOF_MEM_FLAG_COHERENT, SOF_MEM_CAPS_RAM, sizeof(*dd));
src/audio/component.c:258:	blob_handler->data = rballoc(0, SOF_MEM_CAPS_RAM, size);
src/audio/component.c:321:		blob_handler->data_new = rballoc(0, SOF_MEM_CAPS_RAM,
src/audio/tdfb/tdfb.c:380:		cd->fir_delay = rballoc(0, SOF_MEM_CAPS_RAM, delay_size);
src/audio/eq_fir/eq_fir.c:296:	cd->fir_delay = rballoc(0, SOF_MEM_CAPS_RAM, delay_size);
src/audio/base_fw.c:172:	tuple_data = rballoc(0, SOF_MEM_CAPS_RAM, size);
src/audio/src/src.c:613:	cd->delay_lines = rballoc(0, SOF_MEM_CAPS_RAM, delay_lines_size);
src/audio/igo_nr/igo_nr.c:308:	cd->p_handle = rballoc(0, SOF_MEM_CAPS_RAM, cd->igo_lib_info.handle_size);
src/audio/smart_amp/smart_amp.c:84:	sad->mod_handle = rballoc(0, SOF_MEM_CAPS_RAM, mem_sz);
src/audio/smart_amp/smart_amp.c:93:	hspk->buf.frame_in = rballoc(0, SOF_MEM_CAPS_RAM, size);
src/audio/smart_amp/smart_amp.c:100:	hspk->buf.frame_out = rballoc(0, SOF_MEM_CAPS_RAM, size);
src/audio/smart_amp/smart_amp.c:107:	hspk->buf.frame_iv = rballoc(0, SOF_MEM_CAPS_RAM, size);
src/audio/smart_amp/smart_amp.c:114:	hspk->buf.input = rballoc(0, SOF_MEM_CAPS_RAM, size);
src/audio/smart_amp/smart_amp.c:121:	hspk->buf.output = rballoc(0, SOF_MEM_CAPS_RAM, size);
src/audio/smart_amp/smart_amp.c:128:	hspk->buf.voltage = rballoc(0, SOF_MEM_CAPS_RAM, size);
src/audio/smart_amp/smart_amp.c:135:	hspk->buf.current = rballoc(0, SOF_MEM_CAPS_RAM, size);
src/audio/smart_amp/smart_amp.c:142:	hspk->buf.ff.buf = rballoc(0, SOF_MEM_CAPS_RAM, size);
src/audio/smart_amp/smart_amp.c:149:	hspk->buf.ff_out.buf = rballoc(0, SOF_MEM_CAPS_RAM, size);
src/audio/smart_amp/smart_amp.c:156:	hspk->buf.fb.buf = rballoc(0, SOF_MEM_CAPS_RAM, size);
src/audio/smart_amp/smart_amp.c:163:	hspk->dsmhandle = rballoc(0, SOF_MEM_CAPS_RAM, size);
src/audio/smart_amp/smart_amp.c:199:	caldata->data = rballoc(0, SOF_MEM_CAPS_RAM, size);

src/drivers/intel/pmc-ipc.c:136:	_pmc = rmalloc(SOF_MEM_ZONE_SYS, 0, SOF_MEM_CAPS_RAM,
src/drivers/dw/ssi-spi.c:513:	spi_devices = rmalloc(SOF_MEM_ZONE_SYS, 0, SOF_MEM_CAPS_RAM,
src/platform/library/lib/alloc.c:19:void *rmalloc(enum mem_zone zone, uint32_t flags, uint32_t caps, size_t bytes)
src/schedule/zephyr_ll.c:496:	sch = rmalloc(SOF_MEM_ZONE_SYS, 0, SOF_MEM_CAPS_RAM, sizeof(*sch));

lgirdwood · 2021-10-21T16:04:11Z

That's doable, if we are aligned on that, we might need to revisit all API callers as most of them are not following that at the moment, almost none of the caller uses SOF_MEM_CAPS_CACHE explicitly when they are asking for cached address except the audio buffer from the topoloies:

Great, that's what we need to do. Thanks !

keyonjie · 2021-12-20T02:05:07Z

This is only improvement not mandatory, I have no more time to work on this, closing it.

keyonjie requested review from RanderWang, akloniex, bardliao, dbaluta, lbetlej, lgirdwood, libinyang, lyakh, mmaka1, mrajwa and plbossart as code owners September 10, 2021 12:29

keyonjie marked this pull request as draft September 13, 2021 01:54

RanderWang reviewed Sep 13, 2021

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keyonjie force-pushed the heap_refinement branch 3 times, most recently from b7ad7cf to 00633db Compare September 15, 2021 07:43

keyonjie force-pushed the heap_refinement branch from 00633db to 8739299 Compare September 17, 2021 03:15

keyonjie mentioned this pull request Sep 22, 2021

Minor fixes #4753

Merged

keyonjie force-pushed the heap_refinement branch 8 times, most recently from 359dd45 to 029ad51 Compare September 28, 2021 09:22

keyonjie force-pushed the heap_refinement branch 2 times, most recently from a4fdaec to bf05d38 Compare October 9, 2021 05:40

keyonjie requested a review from yaochunhung as a code owner October 9, 2021 16:00

keyonjie added 14 commits October 11, 2021 13:59

testbench: alloc: update rballoc_align with buffer initialized

79e0727

Update to initiaze the new allocated buffers to all 0s by rballoc_align() helper. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

alloc: update comments with 0s initialized for rballoc_align()

59afda0

The rballoc_align() helper will initialize new allocated buffers with 0s, update comments to document this. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

tools: testbench: remove the usage of RUNTIME_SHARED zone

de206ad

Change to use rballoc(SOF_MEM_FLAG_COHERENT,) one now. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

mux: use rballoc() for allocating big buffer

39bb769

The mux cd could be bigger than 1KB, change to use rballoc() for allocating the buffer, to try to ensure the allocation is success. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

memory: move buffers from runtime_shared ZONE to buffer ZONE

079ffe5

We are allocating more buffers from BUFFER zone now, change size of ZONEs to reflect that. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

alloc: remove the usage of system_shared zone

00992ee

Change the usage of the system_shared zone to the buffer zone, and the calling of rmalloc/rzalloc() from system_shared zone to rballoc() with SOF_MEM_ZONE_RUNTIME_SHARED flag. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

memory: move buffers from system ZONE to buffer ZONE

bf6289c

We are allocating more buffers from BUFFER zone now, change size of ZONEs to reflect that. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

alloc: remove the runtime_shared zone

96487ce

Since there is no any usage of the runtime_shared zone now, we can remove it thoroughly now. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

alloc: remove the system_shared zone

8ec50db

Since there is no any usage of the system_shared zone now, we can remove it thoroughly now. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

cmocka: align to the remove the shared zones

1a1526a

Align to the new heap memory map and allocator, SYSTEM_SHARED and RUNTIME_SHARED zones are removed. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

memory: update configurations to adapt to the new allocator

acbbfa5

Now buffer zone should have bigger size, and runtime zone is smaller. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>

keyonjie force-pushed the heap_refinement branch from af098ac to acbbfa5 Compare October 11, 2021 06:00

lyakh requested changes Oct 11, 2021

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keyonjie mentioned this pull request Oct 12, 2021

Minor fixes #4860

Closed

lgirdwood reviewed Oct 13, 2021

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ranj063 mentioned this pull request Oct 20, 2021

[Do Not Review] Secondary core tearing down series #4718

Closed

keyonjie closed this Dec 20, 2021

Heap refinement Part 4 -- zones merged #4747

Heap refinement Part 4 -- zones merged #4747

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