> On Mar 6, 2022, at 7:41 AM, Mihai Popescu <[email protected]> wrote:
>
> Since this thread is moving slowly in another direction, let me
> reiterate my situation again: I am running a browser (mostly chromium)
> and the computer slows down on downloads. Since I've checked the
> downloads rates, I observed they are slow than my maximum 500Mbps for
> the line.
> I can reach 320Mbps maximum, but mostly it stays at 280Mbps and the
> Chromium has 30 seconds delays in everything i do.
>
> As a suggestion from Stuart, I was trying to separate tests for
> downloading and disk write. The disk looks slow.
Is the disk brand new? If I missed this somewhere, apologies.
If it’s not new, how confident are you that the region of disk where chromium
is writing data to disk has not suffered from any reallocations at the physical
layer? I find read and write performance to spinning disks is highly regulated
by physical layout more than anything else. For linear access, of course.
Getting 41 MB/sec on an old disk depending on the region you are accessing is
not out of my expectations, if the disk has reallocations in the region
accessed.
Reallocations occur when the physical media is no longer usable within
thresholds so a new sector/area is allocated elsewhere on the disk and mapped.
This causes seeks for what you consider a linear access. The hardware does
this for you and you can’t stop it nor should you want to.
Solution: Get SSD’s.
> I tried both Debian 11 and Ubuntu and the download and disk write
> jumps to 500Mbps without problems. And no, I cannot tolerate Linux
> enough to use it as a daily OS, so don't bother to recommend it. I
> cannot attain this in OpenBSD. Maybe that is the maximum possible for
> my hardware. Just asking, for the moment i can live with this delays.
> I was curious if someone with similar hardware can do better.
>
> OpenBSD 7.1-beta (GENERIC.MP) #401: Thu Mar 3 12:48:28 MST 2022
> [email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP
> real mem = 7711543296 (7354MB)
> avail mem = 7460630528 (7115MB)
> random: good seed from bootblocks
> mpath0 at root
> scsibus0 at mpath0: 256 targets
> mainbus0 at root
> bios0 at mainbus0: SMBIOS rev. 2.7 @ 0xe86ed (64 entries)
> bios0: vendor Hewlett-Packard version "K06 v02.77" date 03/22/2018
> bios0: Hewlett-Packard HP Compaq Pro 6305 SFF
> acpi0 at bios0: ACPI 5.0
> acpi0: sleep states S0 S3 S4 S5
> acpi0: tables DSDT FACP APIC FPDT MCFG HPET SSDT MSDM TCPA IVRS SSDT SSDT CRAT
> acpi0: wakeup devices SBAZ(S4) PS2K(S3) PS2M(S3) P0PC(S4) PE20(S4)
> PE21(S4) PE22(S4) BNIC(S4) PE23(S4) BR12(S4) BR14(S4) OHC1(S3)
> EHC1(S3) OHC2(S3) EHC2(S3) OHC3(S3) [...]
> acpitimer0 at acpi0: 3579545 Hz, 32 bits
> acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
> cpu0 at mainbus0: apid 16 (boot processor)
> cpu0: AMD A8-5500B APU with Radeon(tm) HD Graphics, 3194.47 MHz, 15-10-01
> cpu0:
> FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,POPCNT,AES,XSAVE,AVX,F16C,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,XOP,SKINIT,WDT,FMA4,TCE,NODEID,TBM,TOPEXT,CPCTR,ITSC,BMI1,IBPB
> cpu0: 64KB 64b/line 2-way I-cache, 16KB 64b/line 4-way D-cache, 2MB
