network profile
| bio | website | |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 1 year, 7 months |
| seen | Apr 2 at 18:50 | |
| stats | profile views | 7 |
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May 4 |
awarded | Popular Question |
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Jan 12 |
awarded | Supporter |
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Jan 11 |
comment |
When the TCP engine decides to send an ACK? For uploading, between two ACKs, there are around 22 frames transmitted. My guess is that, for uploading the delayed ACK is activated. Because, the time between ACKs is 0.6ms which is smaller than TCP_DELACK_MAX(2ms) and larger than TCP_DELACK_MIN(0.4ms). What you think? |
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Jan 10 |
comment |
When the TCP engine decides to send an ACK? Yes, the main reason for this is the capabilities of CPU. My PC is capable of sending a packet every 12.5us average while the router sends a packet every 90us average. So, the uploading should be 7 time faster, but it didn't. That's why I think the ACK also has a quite important influence. |
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Jan 10 |
comment |
When the TCP engine decides to send an ACK? This is exactly what I saw for the downloading, my PC ACKs after receiving two packets but not for the uploading. Besides, where the kernel's implementation for ACKing every other data packet? |
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Jan 10 |
asked | When the TCP engine decides to send an ACK? |
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Jan 10 |
asked | Needs help to understand the wireshark results of a data transferring |
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Dec 17 |
revised |
Why data sending is heavier for CPU than data receiving? complement information |
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Dec 17 |
suggested | suggested edit on Why data sending is heavier for CPU than data receiving? |
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Dec 16 |
comment |
Why data sending is heavier for CPU than data receiving? It's MBit, not Megabyte. |
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Dec 16 |
asked | Why data sending is heavier for CPU than data receiving? |
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Nov 5 |
awarded | Editor |
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Nov 5 |
revised |
tftp server configuration under ubuntu, Access violation added 282 characters in body |
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Nov 5 |
asked | tftp server configuration under ubuntu, Access violation |
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Oct 26 |
awarded | Scholar |
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Oct 26 |
accepted | Looking for advice to find the bottleneck of Samba server |
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Oct 26 |
comment |
Looking for advice to find the bottleneck of Samba server Hi, I found the problems. In fact, it is the ehternet card in the PC which runs on 100mbit that put the limits. The arm in NAS router quick enough, so it has to wait in order not overflowing the ehternet card buffer. That's explain why there are so many default_idle. Thanks |
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Oct 25 |
comment |
Looking for advice to find the bottleneck of Samba server Hi @adaptr, thanks for your answer. As you said SMB has considerable protocol overhead. But I am still not clear if this can explain the 37% of default_idle function. I think if the portion goes down to around 10%, the CPU can have more clocks available to handle smbd process which in turn increase its performance. |
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Oct 25 |
awarded | Student |
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Oct 25 |
asked | Looking for advice to find the bottleneck of Samba server |
