ligang/vpp
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

svm session: use new clib mem apis for segments

Browse Source 
"sh memory map" now reports shared memory segments mapped by session
layer for applications.

Type: improvement

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: I7debdcd06c7728abfb5cf817a1ccc37de495472c
This commit is contained in:
Florin Coras
2020-09-28 23:40:28 -07:00
committed by Damjan Marion
parent 5aa34d54de
commit 2a7c0b6fc0
7 changed files with 96 additions and 66 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
src/svm/fifo_segment.c
View File

@ -1362,7 +1362,7 @@ format_fifo_segment_type (u8 * s, va_list * args)
ssvm_segment_type_t st = ssvm_type (&sp->ssvm);
if (st == SSVM_SEGMENT_PRIVATE)
s = format (s, "%s", "private-heap");
s = format (s, "%s", "private");
else if (st == SSVM_SEGMENT_MEMFD)
s = format (s, "%s", "memfd");
else if (st == SSVM_SEGMENT_SHM)
@ -1400,7 +1400,7 @@ format_fifo_segment (u8 * s, va_list * args)
if (fs == 0)
{
s = format (s, "%-15s%15s%15s%15s%15s%15s", "Name", "Type",
s = format (s, "%-20s%10s%15s%15s%15s%15s", "Name", "Type",
"HeapSize (M)", "ActiveFifos", "FreeFifos", "Address");
return s;
}
@ -1409,7 +1409,7 @@ format_fifo_segment (u8 * s, va_list * args)
active_fifos = fifo_segment_num_fifos (fs);
free_fifos = fifo_segment_num_free_fifos (fs);
s = format (s, "%-15v%15U%15llu%15u%15u%15llx", ssvm_name (&fs->ssvm),
s = format (s, "%-20v%10U%15llu%15u%15u%15llx", ssvm_name (&fs->ssvm),
format_fifo_segment_type, fs, size >> 20ULL, active_fifos,
free_fifos, address);

117
src/svm/ssvm.c
View File

@ -29,7 +29,6 @@ int
ssvm_master_init_shm (ssvm_private_t * ssvm)
{
int ssvm_fd;
clib_mem_vm_map_t mapa = { 0 };
u8 junk = 0, *ssvm_filename;
ssvm_shared_header_t *sh;
uword page_size, requested_va = 0;
@ -84,19 +83,18 @@ ssvm_master_init_shm (ssvm_private_t * ssvm)
clib_mem_vm_randomize_va (&requested_va, min_log2 (page_size));
}
mapa.requested_va = requested_va;
mapa.size = ssvm->ssvm_size;
mapa.fd = ssvm_fd;
mapa.numa_node = ssvm->numa;
if (clib_mem_vm_ext_map (&mapa))
sh = clib_mem_vm_map_shared (uword_to_pointer (requested_va, void *),
ssvm->ssvm_size, ssvm_fd, 0,
(char *) ssvm->name);
if (sh == CLIB_MEM_VM_MAP_FAILED)
{
clib_unix_warning ("mmap");
close (ssvm_fd);
return SSVM_API_ERROR_MMAP;
}
close (ssvm_fd);
sh = mapa.addr;
CLIB_MEM_UNPOISON (sh, sizeof (*sh));
sh->master_pid = ssvm->my_pid;
sh->ssvm_size = ssvm->ssvm_size;
@ -206,7 +204,10 @@ ssvm_delete_shm (ssvm_private_t * ssvm)
vec_free (fn);
vec_free (ssvm->name);
munmap ((void *) ssvm->sh, ssvm->ssvm_size);
if (ssvm->i_am_master)
clib_mem_vm_unmap (ssvm->sh);
else
munmap ((void *) ssvm->sh, ssvm->ssvm_size);
}
/**
@ -215,44 +216,60 @@ ssvm_delete_shm (ssvm_private_t * ssvm)
int
ssvm_master_init_memfd (ssvm_private_t * memfd)
{
int log2_page_size, n_pages;
uword page_size;
ssvm_shared_header_t *sh;
void *oldheap;
clib_mem_vm_alloc_t alloc = { 0 };
clib_error_t *err;
if (memfd->ssvm_size == 0)
return SSVM_API_ERROR_NO_SIZE;
ASSERT (vec_c_string_is_terminated (memfd->name));
alloc.name = (char *) memfd->name;
alloc.size = memfd->ssvm_size;
alloc.flags = CLIB_MEM_VM_F_SHARED;
alloc.requested_va = memfd->requested_va;
if (memfd->numa)
memfd->fd = clib_mem_vm_create_fd (CLIB_MEM_PAGE_SZ_DEFAULT,
(char *) memfd->name);
if (memfd->fd == CLIB_MEM_ERROR)
{
alloc.numa_node = memfd->numa;
alloc.flags |= CLIB_MEM_VM_F_NUMA_PREFER;
}
if ((err = clib_mem_vm_ext_alloc (&alloc)))
{
clib_error_report (err);
clib_unix_warning (0, "failed to create memfd");
return SSVM_API_ERROR_CREATE_FAILURE;
}
memfd->fd = alloc.fd;
memfd->sh = (ssvm_shared_header_t *) alloc.addr;
log2_page_size = clib_mem_get_fd_log2_page_size (memfd->fd);
if (log2_page_size == 0)
{
clib_unix_warning (0, "cannot determine page size");
return SSVM_API_ERROR_CREATE_FAILURE;
}
n_pages = ((memfd->ssvm_size - 1) >> log2_page_size) + 1;
if ((ftruncate (memfd->fd, n_pages << log2_page_size)) == -1)
{
clib_unix_warning (0, "memfd ftruncate failure");
return SSVM_API_ERROR_CREATE_FAILURE;
}
sh = clib_mem_vm_map_shared (uword_to_pointer (memfd->requested_va, void *),
memfd->ssvm_size, memfd->fd, 0,
(char *) memfd->name);
if (sh == CLIB_MEM_VM_MAP_FAILED)
{
clib_unix_warning ("memfd map (fd %d)", memfd->fd);
close (memfd->fd);
return SSVM_API_ERROR_CREATE_FAILURE;
}
memfd->sh = sh;
memfd->my_pid = getpid ();
memfd->i_am_master = 1;
page_size = 1ull << alloc.log2_page_size;
sh = memfd->sh;
sh->master_pid = memfd->my_pid;
sh->ssvm_size = memfd->ssvm_size;
sh->ssvm_va = pointer_to_uword (sh);
sh->type = SSVM_SEGMENT_MEMFD;
page_size = 1 << log2_page_size;
sh->heap = clib_mem_create_heap (((u8 *) sh) + page_size,
memfd->ssvm_size - page_size,
1 /* locked */ , "ssvm master memfd");
@ -327,7 +344,10 @@ void
ssvm_delete_memfd (ssvm_private_t * memfd)
{
vec_free (memfd->name);
clib_mem_vm_free (memfd->sh, memfd->ssvm_size);
if (memfd->i_am_master)
clib_mem_vm_unmap (memfd->sh);
else
clib_mem_vm_free (memfd->sh, memfd->ssvm_size);
close (memfd->fd);
}
@ -337,34 +357,35 @@ ssvm_delete_memfd (ssvm_private_t * memfd)
int
ssvm_master_init_private (ssvm_private_t * ssvm)
{
uword pagesize = clib_mem_get_page_size (), rnd_size = 0;
clib_mem_vm_alloc_t alloc = { 0 };
uword page_size, log2_page_size, rnd_size = 0;
ssvm_shared_header_t *sh;
clib_error_t *err;
void *oldheap;
u8 *heap;
rnd_size = clib_max (ssvm->ssvm_size + (pagesize - 1), ssvm->ssvm_size);
rnd_size &= ~(pagesize - 1);
alloc.name = (char *) ssvm->name;
alloc.size = rnd_size + pagesize;
if (ssvm->numa)
log2_page_size = clib_mem_get_log2_page_size ();
if (log2_page_size == 0)
{
alloc.numa_node = ssvm->numa;
alloc.flags |= CLIB_MEM_VM_F_NUMA_PREFER;
}
if ((err = clib_mem_vm_ext_alloc (&alloc)))
{
clib_error_report (err);
clib_unix_warning (0, "cannot determine page size");
return SSVM_API_ERROR_CREATE_FAILURE;
}
heap = clib_mem_create_heap ((u8 *) alloc.addr + pagesize, rnd_size,
page_size = 1 << log2_page_size;
rnd_size = clib_max (ssvm->ssvm_size + (page_size - 1), ssvm->ssvm_size);
rnd_size &= ~(page_size - 1);
sh = clib_mem_vm_map (0, rnd_size + page_size, log2_page_size,
(char *) ssvm->name);
if (sh == CLIB_MEM_VM_MAP_FAILED)
{
clib_unix_warning ("private map failed");
return SSVM_API_ERROR_CREATE_FAILURE;
}
heap = clib_mem_create_heap ((u8 *) sh + page_size, rnd_size,
1 /* locked */ , "ssvm master private");
if (heap == 0)
{
clib_unix_warning ("mheap alloc");
clib_unix_warning ("heap alloc");
return -1;
}
@ -376,7 +397,6 @@ ssvm_master_init_private (ssvm_private_t * ssvm)
ssvm->requested_va = ~0;
/* First page in allocated memory is set aside for the shared header */
sh = alloc.addr;
ssvm->sh = sh;
clib_memset (sh, 0, sizeof (*sh));
@ -384,7 +404,10 @@ ssvm_master_init_private (ssvm_private_t * ssvm)
sh->ssvm_size = rnd_size;
sh->ssvm_va = pointer_to_uword (heap);
sh->type = SSVM_SEGMENT_PRIVATE;
sh->name = ssvm->name;
oldheap = ssvm_push_heap (sh);
sh->name = format (0, "%s", ssvm->name, 0);
ssvm_pop_heap (oldheap);
return 0;
}
@ -401,7 +424,7 @@ ssvm_delete_private (ssvm_private_t * ssvm)
{
vec_free (ssvm->name);
clib_mem_destroy_heap (ssvm->sh->heap);
clib_mem_vm_free (ssvm->sh, ssvm->ssvm_size + clib_mem_get_page_size ());
clib_mem_vm_unmap (ssvm->sh);
}
int

2
src/svm/ssvm.h
View File

@ -85,7 +85,7 @@ typedef struct
uword requested_va;
u32 my_pid;
u8 *name;
u8 numa; /**< Numa requested at alloc time */
u8 numa; /**< UNUSED: numa requested at alloc time */
int i_am_master;
union

7
src/vnet/session/application.c
View File

@ -876,11 +876,8 @@ vnet_application_attach (vnet_app_attach_args_t * a)
if (application_is_proxy (app))
{
application_setup_proxy (app);
/*
* I suspect the segment manager pool gets reallocated (because a new listener
* is added, and each listener has a segment manager) so sm becomes a dangling
* reference. That's why we need to re-grab sm.
*/
/* The segment manager pool is reallocated because a new listener
* is added. Re-grab segment manager to avoid dangling reference */
sm = segment_manager_get (app_wrk->first_segment_manager);
}

8
src/vnet/session/application_worker.c
View File

@ -180,12 +180,12 @@ app_worker_alloc_segment_manager (app_worker_t * app_wrk)
{
sm = segment_manager_get (app_wrk->first_segment_manager);
app_wrk->first_segment_manager_in_use = 1;
return sm;
}
sm = segment_manager_alloc ();
else
{
sm = segment_manager_alloc ();
}
sm->app_wrk_index = app_wrk->wrk_index;
return sm;
}

14
src/vnet/session/segment_manager.c
View File

@ -138,11 +138,16 @@ segment_manager_add_segment (segment_manager_t * sm, uword segment_size)
}
}
else
seg_name = format (0, "%s%c", "process-private", 0);
{
app_worker_t *app_wrk = app_worker_get (sm->app_wrk_index);
application_t *app = application_get (app_wrk->app_index);
seg_name = format (0, "%v segment%c", app->name, 0);
}
fs->ssvm.ssvm_size = segment_size;
fs->ssvm.name = seg_name;
fs->ssvm.requested_va = baseva;
/* clib_mem_vm_map_shared consumes first page before requested_va */
fs->ssvm.requested_va = baseva + page_size;
if ((rv = ssvm_master_init (&fs->ssvm, props->segment_type)))
{
@ -192,7 +197,9 @@ segment_manager_del_segment (segment_manager_t * sm, fifo_segment_t * fs)
if (ssvm_type (&fs->ssvm) != SSVM_SEGMENT_PRIVATE)
{
clib_valloc_free (&smm->va_allocator, fs->ssvm.requested_va);
/* clib_mem_vm_map_shared consumes first page before requested_va */
clib_valloc_free (&smm->va_allocator,
fs->ssvm.requested_va - clib_mem_get_page_size ());
if (!segment_manager_app_detached (sm))
{
@ -947,6 +954,7 @@ segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input,
}));
/* *INDENT-ON* */
vlib_cli_output (vm, "\n");
}
if (show_segments)
{

8
src/vnet/session/session.c
View File

@ -1496,8 +1496,9 @@ session_vpp_event_queues_allocate (session_main_t * smm)
eqs->ssvm_size = eqs_size;
eqs->i_am_master = 1;
eqs->my_pid = vpp_pid;
eqs->name = format (0, "%s%c", "evt-qs-segment", 0);
eqs->requested_va = smm->session_baseva;
eqs->name = format (0, "%s%c", "session: evt-qs-segment", 0);
/* clib_mem_vm_map_shared consumes first page before requested_va */
eqs->requested_va = smm->session_baseva + clib_mem_get_page_size ();
if (ssvm_master_init (eqs, SSVM_SEGMENT_MEMFD))
{
@ -1661,6 +1662,7 @@ session_manager_main_enable (vlib_main_t * vm)
session_main_t *smm = &session_main;
vlib_thread_main_t *vtm = vlib_get_thread_main ();
u32 num_threads, preallocated_sessions_per_worker;
uword margin = 8 << 12;
session_worker_t *wrk;
int i;
@ -1691,7 +1693,7 @@ session_manager_main_enable (vlib_main_t * vm)
session_vpp_event_queues_allocate (smm);
/* Initialize fifo segment main baseva and timeout */
sm_args->baseva = smm->session_baseva + smm->evt_qs_segment_size;
sm_args->baseva = smm->session_baseva + smm->evt_qs_segment_size + margin;
sm_args->size = smm->session_va_space_size;
segment_manager_main_init (sm_args);