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authorFlorin Coras <fcoras@cisco.com>2021-12-22 12:54:17 -0800
committerDave Barach <openvpp@barachs.net>2021-12-23 16:17:57 +0000
commitcdfe8abc613a0aa936963d31bc60cec86a5c641d (patch)
treeb0a075e152358b692a53f6545a5e3345c9df2264 /src/vnet/session
parente6387b2b9fdaca33d50c1074dda5d41e1092e8ad (diff)
session svm: track fs and seg manager index in fs
Simplifies allocation of fifos as fifo segment and segment manager indices can be set at alloc time. Type: improvement Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: Ibd357b3ff0279d8deefcdcb17010b4068007ccb7
Diffstat (limited to 'src/vnet/session')
-rw-r--r--src/vnet/session/application_local.c4
-rw-r--r--src/vnet/session/segment_manager.c58
2 files changed, 20 insertions, 42 deletions
diff --git a/src/vnet/session/application_local.c b/src/vnet/session/application_local.c
index 6d1c9654197..83def8eb730 100644
--- a/src/vnet/session/application_local.c
+++ b/src/vnet/session/application_local.c
@@ -621,10 +621,6 @@ ct_init_accepted_session (app_worker_t *server_wrk, ct_connection_t *ct,
ls->tx_fifo->shr->master_session_index = ls->session_index;
ls->rx_fifo->master_thread_index = ls->thread_index;
ls->tx_fifo->master_thread_index = ls->thread_index;
- ls->rx_fifo->segment_manager = sm_index;
- ls->tx_fifo->segment_manager = sm_index;
- ls->rx_fifo->segment_index = fs_index;
- ls->tx_fifo->segment_index = fs_index;
seg_handle = segment_manager_segment_handle (sm, fs);
segment_manager_segment_reader_unlock (sm);
diff --git a/src/vnet/session/segment_manager.c b/src/vnet/session/segment_manager.c
index cbf6207060c..3b05cd024de 100644
--- a/src/vnet/session/segment_manager.c
+++ b/src/vnet/session/segment_manager.c
@@ -154,6 +154,8 @@ segment_manager_add_segment_inline (segment_manager_t *sm, uword segment_size,
* Save segment index before dropping lock, if any held
*/
fs_index = fs - sm->segments;
+ fs->fs_index = fs_index;
+ fs->sm_index = segment_manager_index (sm);
/*
* Set watermarks in segment
@@ -698,19 +700,16 @@ segment_manager_del_sessions_filter (segment_manager_t *sm,
}
int
-segment_manager_try_alloc_fifos (fifo_segment_t * fifo_segment,
- u32 thread_index,
+segment_manager_try_alloc_fifos (fifo_segment_t *fs, u32 thread_index,
u32 rx_fifo_size, u32 tx_fifo_size,
- svm_fifo_t ** rx_fifo, svm_fifo_t ** tx_fifo)
+ svm_fifo_t **rx_fifo, svm_fifo_t **tx_fifo)
{
rx_fifo_size = clib_max (rx_fifo_size, sm_main.default_fifo_size);
- *rx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
- rx_fifo_size,
+ *rx_fifo = fifo_segment_alloc_fifo_w_slice (fs, thread_index, rx_fifo_size,
FIFO_SEGMENT_RX_FIFO);
tx_fifo_size = clib_max (tx_fifo_size, sm_main.default_fifo_size);
- *tx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
- tx_fifo_size,
+ *tx_fifo = fifo_segment_alloc_fifo_w_slice (fs, thread_index, tx_fifo_size,
FIFO_SEGMENT_TX_FIFO);
if (*rx_fifo == 0)
@@ -718,19 +717,19 @@ segment_manager_try_alloc_fifos (fifo_segment_t * fifo_segment,
/* This would be very odd, but handle it... */
if (*tx_fifo != 0)
{
- fifo_segment_free_fifo (fifo_segment, *tx_fifo);
+ fifo_segment_free_fifo (fs, *tx_fifo);
*tx_fifo = 0;
}
- return -1;
+ return SESSION_E_SEG_NO_SPACE;
}
if (*tx_fifo == 0)
{
if (*rx_fifo != 0)
{
- fifo_segment_free_fifo (fifo_segment, *rx_fifo);
+ fifo_segment_free_fifo (fs, *rx_fifo);
*rx_fifo = 0;
}
- return -1;
+ return SESSION_E_SEG_NO_SPACE;
}
return 0;
@@ -744,8 +743,6 @@ sm_lookup_segment_and_alloc_fifos (segment_manager_t *sm,
{
uword free_bytes, max_free_bytes;
fifo_segment_t *cur, *fs = 0;
- u32 fs_index;
- int rv;
max_free_bytes = props->rx_fifo_size + props->tx_fifo_size - 1;
@@ -764,11 +761,9 @@ sm_lookup_segment_and_alloc_fifos (segment_manager_t *sm,
if (PREDICT_FALSE (!fs))
return SESSION_E_SEG_NO_SPACE;
- fs_index = segment_manager_segment_index (sm, fs);
- rv = segment_manager_try_alloc_fifos (fs, thread_index, props->rx_fifo_size,
- props->tx_fifo_size, rx_fifo, tx_fifo);
-
- return rv ? SESSION_E_SEG_NO_SPACE : fs_index;
+ return segment_manager_try_alloc_fifos (
+ fs, thread_index, props->rx_fifo_size, props->tx_fifo_size, rx_fifo,
+ tx_fifo);
}
static int
@@ -789,7 +784,7 @@ sm_lock_and_alloc_segment_and_fifos (segment_manager_t *sm,
* some fifos or allocated a segment */
rv = sm_lookup_segment_and_alloc_fifos (sm, props, thread_index, rx_fifo,
tx_fifo);
- if (rv > 0)
+ if (!rv)
goto done;
new_fs_index =
@@ -809,8 +804,6 @@ sm_lock_and_alloc_segment_and_fifos (segment_manager_t *sm,
goto done;
}
- rv = new_fs_index;
-
done:
clib_rwlock_writer_unlock (&sm->segments_rwlock);
@@ -825,11 +818,9 @@ segment_manager_alloc_session_fifos (segment_manager_t * sm,
svm_fifo_t ** tx_fifo)
{
segment_manager_props_t *props;
- u32 sm_index;
- int fs_index;
+ int rv;
props = segment_manager_properties_get (sm);
- sm_index = segment_manager_index (sm);
/*
* Fast path: find the first segment with enough free space and
@@ -838,8 +829,8 @@ segment_manager_alloc_session_fifos (segment_manager_t * sm,
segment_manager_segment_reader_lock (sm);
- fs_index = sm_lookup_segment_and_alloc_fifos (sm, props, thread_index,
- rx_fifo, tx_fifo);
+ rv = sm_lookup_segment_and_alloc_fifos (sm, props, thread_index, rx_fifo,
+ tx_fifo);
segment_manager_segment_reader_unlock (sm);
@@ -847,18 +838,9 @@ segment_manager_alloc_session_fifos (segment_manager_t * sm,
* Slow path: if no fifo segment or alloc fail grab writer lock and try
* to allocate new segment
*/
- if (PREDICT_FALSE (fs_index < 0))
- {
- fs_index = sm_lock_and_alloc_segment_and_fifos (sm, props, thread_index,
- rx_fifo, tx_fifo);
- if (fs_index < 0)
- return fs_index;
- }
-
- (*tx_fifo)->segment_manager = sm_index;
- (*rx_fifo)->segment_manager = sm_index;
- (*tx_fifo)->segment_index = fs_index;
- (*rx_fifo)->segment_index = fs_index;
+ if (PREDICT_FALSE (rv < 0))
+ return sm_lock_and_alloc_segment_and_fifos (sm, props, thread_index,
+ rx_fifo, tx_fifo);
return 0;
}