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intel/tools/aub: print better error message when mmap fails

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Aubinator creates lots of 4k mappings, so for large traces it's
possible to hit system limit on the number of mappings created
by a single process.

Ideally, aubinator should merge those mappings, but that's tricky
and I'm not sure it's worth spending time on.

Signed-off-by: Marcin Ślusarz <marcin.slusarz@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8988>
This commit is contained in:
Marcin Ślusarz 2021-02-10 12:22:11 +01:00 • committed by Marge Bot
parent 93824b6451
commit 0893f6f03f
1 changed files with 24 additions and 8 deletions
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32
src/intel/tools/aub_mem.c
View file

@ -21,6 +21,7 @@
* IN THE SOFTWARE.
*/
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
@ -136,6 +137,23 @@ cmp_phys_mem(const struct rb_node *node, const void *addr)
return cmp_uint64(mem->phys_addr, *(uint64_t *)addr);
}
static void
check_mmap_result(const void *res)
{
if (res != MAP_FAILED)
return;
if (errno == ENOMEM) {
fprintf(stderr,
"Not enough memory available or maximum number of mappings reached. "
"Consider increasing sysctl vm.max_map_count.\n");
} else {
perror("mmap");
}
abort();
}
static struct phys_mem *
ensure_phys_mem(struct aub_mem *mem, uint64_t phys_addr)
{
@ -151,7 +169,7 @@ ensure_phys_mem(struct aub_mem *mem, uint64_t phys_addr)
new_mem->data = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_SHARED,
mem->mem_fd, new_mem->fd_offset);
assert(new_mem->data != MAP_FAILED);
check_mmap_result(new_mem->data);
rb_tree_insert_at(&mem->mem, node, &new_mem->node, cmp < 0);
node = &new_mem->node;
@ -268,7 +286,7 @@ aub_mem_get_ggtt_bo(void *_mem, uint64_t address)
bo.addr = MIN2(address, start->virt_addr);
bo.size = last->virt_addr - bo.addr + 4096;
bo.map = mmap(NULL, bo.size, PROT_READ, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
assert(bo.map != MAP_FAILED);
check_mmap_result(bo.map);
for (struct ggtt_entry *i = start;
i;
@ -280,10 +298,9 @@ aub_mem_get_ggtt_bo(void *_mem, uint64_t address)
continue;
uint32_t map_offset = i->virt_addr - address;
ASSERTED void *res =
mmap((uint8_t *)bo.map + map_offset, 4096, PROT_READ,
void *res = mmap((uint8_t *)bo.map + map_offset, 4096, PROT_READ,
MAP_SHARED | MAP_FIXED, mem->mem_fd, phys_mem->fd_offset);
assert(res != MAP_FAILED);
check_mmap_result(res);
}
add_gtt_bo_map(mem, bo, false, true);
@ -346,10 +363,9 @@ aub_mem_get_ppgtt_bo(void *_mem, uint64_t address)
for (uint64_t page = address; page < end; page += 4096) {
struct phys_mem *phys_mem = ppgtt_walk(mem, mem->pml4, page);
ASSERTED void *res =
mmap((uint8_t *)bo.map + (page - bo.addr), 4096, PROT_READ,
void *res = mmap((uint8_t *)bo.map + (page - bo.addr), 4096, PROT_READ,
MAP_SHARED | MAP_FIXED, mem->mem_fd, phys_mem->fd_offset);
assert(res != MAP_FAILED);
check_mmap_result(res);
}
add_gtt_bo_map(mem, bo, true, true);