* [dpdk-test-report]|SUCCESS | dpdk|f62f4a375f| Intel-Testing
@ 2023-02-20 12:15 sys_stv
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From: sys_stv @ 2023-02-20 12:15 UTC (permalink / raw)
To: test-report
Cc: Thomas Monjalon, lijuan.tu, daxuex.gao, David Marchand,
Fengnan Chang, chenyux.huang
[-- Attachment #1: Type: text/plain, Size: 4750 bytes --]
Test-Label: intel-Testing
Test-Status: SUCCESS
_Testing PASS
DPDK git repo: dpdk
commit f62f4a375ff496abf66e48d5e1b1c442b86a82c1
Author: Fengnan Chang <changfengnan@bytedance.com>
Date: Fri Feb 10 14:30:22 2023 +0800
malloc: optimize 4K allocations
Here is a simple test case:
"
uint64_t entry_time, time;
size_t size = 4096;
unsigned align = 4096;
for (int j = 0; j < 10; j++) {
entry_time = rte_get_timer_cycles();
for (int i = 0; i < 2000; i++) {
rte_malloc(NULL, size, align);
}
time = (rte_get_timer_cycles()-entry_time) * 1000000 /
rte_get_timer_hz();
printf("total open time %lu avg time %lu\n", time, time/2000);
}
"
Single rte_malloc cost time may becomes worse as the number of malloc
increases, In my env, first round avg time is 15us, second is 44us,
third is 77us, fourth is 168us...
The reason is, in the malloc process, malloc_elem_alloc may split new_elem
if there have too much free space after new_elem, and insert the trailer
into freelist. When alloc 4k with align 4k, the trailer very likely insert
to free_head[2] again, it makes free_head[2] longer. when alloc 4k again,
it will search free_head[2] from begin, with the number of malloc
increases, search free_head[2] need more time, so the performance will
become worse.
Same problem will also occurs in alloc 64k with align 64k, but if alloc
4k with align 64, doesn't have this problem.
Fix this by adjust free_head list size range, make free_head[3] hold
elements which bigger or equal 4k, free_head[4] hold elements which bigger
or equal 16k.
In terms of probabilities, when alloc 4k or 16k, the probability of
finding a suitable elem from a larger size list is greater than from a
smaller size list.
Signed-off-by: Fengnan Chang <changfengnan@bytedance.com>
Acked-by: Morten Brørup <mb@smartsharesystems.com>
Testing Summary : 18 Case Done, 18 Successful, 0 Failures
Testbed #1: 9 Case Done, 9 Successful, 0 Failures
* Test result details:
+-------------+---------------------------+-------+
| suite | case | status|
+-------------+---------------------------+-------+
| asan_smoke | test_rxtx_with_ASan_enable| passed|
| pf_smoke | test_pf_jumbo_frames | passed|
| pf_smoke | test_pf_rss | passed|
| pf_smoke | test_pf_tx_rx_queue | passed|
| vf_smoke | test_vf_jumbo_frames | passed|
| vf_smoke | test_vf_rss | passed|
| vf_smoke | test_vf_tx_rx_queue | passed|
| virtio_smoke| test_virtio_loopback | passed|
| virtio_smoke| test_virtio_pvp | passed|
+-------------+---------------------------+-------+
* Environment:
OS : Ubuntu 20.04.5 LTS
Kernel : 5.8.0-63-generic
GCC : 9.4.0-1ubuntu1~20.04.1
NIC : Ethernet Controller E810-C for SFP
Target : x86_64-native-linuxapp-gcc
Testbed #2: 9 Case Done, 9 Successful, 0 Failures
* Test result details:
+-------------+---------------------------+-------+
| suite | case | status|
+-------------+---------------------------+-------+
| asan_smoke | test_rxtx_with_ASan_enable| passed|
| pf_smoke | test_pf_jumbo_frames | passed|
| pf_smoke | test_pf_rss | passed|
| pf_smoke | test_pf_tx_rx_queue | passed|
| vf_smoke | test_vf_rss | passed|
| vf_smoke | test_vf_tx_rx_queue | passed|
| vf_smoke | test_vf_jumbo_frames | n/a |
| virtio_smoke| test_virtio_loopback | passed|
| virtio_smoke| test_virtio_pvp | passed|
+-------------+---------------------------+-------+
* Environment:
OS : Ubuntu 20.04.5 LTS
Kernel : 5.13.0-30-generic
GCC : 9.4.0-1ubuntu1~20.04.1
NIC : Ethernet Controller XL710 for 40GbE QSFP+
Target : x86_64-native-linuxapp-gcc
TestPlan:
pf_smoke: http://git.dpdk.org/tools/dts/tree/test_plans/pf_smoke_test_plan.rst
vf_smoke: http://git.dpdk.org/tools/dts/tree/test_plans/vf_smoke_test_plan.rst
asan_smoke: http://git.dpdk.org/tools/dts/tree/test_plans/asan_smoke_test_plan.rst
TestSuite:
pf_smoke: http://git.dpdk.org/tools/dts/tree/tests/TestSuite_pf_smoke.py
vf_smoke: http://git.dpdk.org/tools/dts/tree/tests/TestSuite_vf_smoke.py
virtio_smoke: http://git.dpdk.org/tools/dts/tree/tests/TestSuite_virtio_smoke.py
asan_smoke: http://git.dpdk.org/tools/dts/tree/tests/TestSuite_asan_smoke.py
DPDK STV team
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