[Performance regression] BCM4359/9 on S905X2
Marc Gonzalez
marc.w.gonzalez at free.fr
Mon Apr 17 07:22:36 PDT 2023
On 06/04/2023 18:35, Marc Gonzalez wrote:
> # curl -o /dev/null http://192.168.1.254:8095/fixed/1G
> % Total % Received % Xferd Average Speed Time Time Time Current
> Dload Upload Total Spent Left Speed
> 100 1024M 100 1024M 0 0 9747k 0 0:01:47 0:01:47 --:--:-- 9544k
I was able to import the bcmdhd driver from:
https://android.googlesource.com/kernel/hikey-linaro/+log/refs/heads/android-amlogic-bmeson-6.1/drivers/net/wireless/bcmdhd
as pointed out by Neil.
I switched from brcmfmac to bcmdhd with:
-CONFIG_BRCMFMAC=y
-CONFIG_BRCMDBG=y
+CONFIG_BCMDHD=y
+CONFIG_BCMDHD_FW_PATH=""
+CONFIG_BCMDHD_NVRAM_PATH=""
+CONFIG_BCMDHD_SDIO_IRQ=y
and hard-coded the FW paths in dhd_set_path_params().
Here are the benchmark results on the bcm4359 (AP6398SR3 module)
# curl -o /dev/null http://192.168.1.254:8095/fixed/1G
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 1024M 100 1024M 0 0 17.3M 0 0:00:58 0:00:58 --:--:-- 17.4M
which is noticeably faster (80%) than brcmfmac results.
FTR, system was 18.5% busy for this benchmark:
81.5653% 195114 0:swapper
13.8287% 33080 57:irq/17-ffe03000
1.3967% 3341 173:curl
1.1350% 2715 63:dhd_rxf
1.0455% 2501 129:ksdioirqd/mmc2
1.0004% 2393 62:dhd_dpc
0.0167% 40 171:perf
0.0088% 21 19:ksoftirqd/1
I was not able to get the driver to work with bcm43752 (AP6398SR32 module).
It loops with:
[ 15.221622] wl_run_escan: LEGACY_SCAN sync ID: 0, bssidx: 0
[ 15.221661] CFG80211-ERROR) wl_run_escan :
[ 15.221664] Escan set error (-37)
[ 15.229067] dhd_ioctl_entry_local invalid parameter
[ 15.233902] CFG80211-ERROR) wl_run_escan :
[ 15.233904] error (-37), cnt=1
[ 15.241056] CFG80211-ERROR) wl_cfg80211_scan :
[ 15.241059] scan error (-11)
But I may have bungled adding the "new" chip, since the driver architecture
is... [censored].
I suppose the conclusion is:
1) bcmdhd is 80% faster than brcmfmac in one download scenario
2) CPU usage scales linearly with throughput (on this system, 1% ~ 7 Mbps)
Regards
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