Date: Mon, 29 Jun 1998 22:40:20 -0400 (EDT) From: Yee Man Chan <ymc@eecs.umich.edu> To: freebsd-hackers@FreeBSD.ORG Subject: client-server problem Message-ID: <Pine.GSO.3.96.980629221622.1437A-300000@shivam.eecs.umich.edu>
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This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. Send mail to mime@docserver.cac.washington.edu for more info. ---559023410-851401618-899173587=:1437 Content-Type: TEXT/PLAIN; CHARSET=US-ASCII Content-ID: <Pine.GSO.3.96.980629222834.1442B@shivam.eecs.umich.edu> Hi, I wrote a simple client-server program (attached). What it does is: 1. Client sends a string of n (n is a parameter) bytes 2. Server receives the string and sends the bytes it received back to the client. Usage: Run server -n 100 in one shell and client -n 100 in the other shell. Then the n mentioned above will be set to 100. The program assumes both client and server are on the same machine, so nothing should go to the network. Here is how the program performs under FreeBSD 3.0-CURRENT with different n: 1-100 Very fast 101-207 Very Slow (This range is the strangest I've ever seen) 208-1024 Very fast (just like 1-100) >1024 strange errors like unknown host or connection timedout Any clue? Yee Man ---559023410-851401618-899173587=:1437 Content-Type: TEXT/PLAIN; charset=US-ASCII; name="client.c" Content-Transfer-Encoding: BASE64 Content-ID: <Pine.GSO.3.96.980629224020.1464B@shivam.eecs.umich.edu> Content-Description: I2luY2x1ZGUgPHN0ZGlvLmg+DQojaW5jbHVkZSA8c3RkbGliLmg+DQojaW5j bHVkZSA8dW5pc3RkLmg+DQojaW5jbHVkZSA8bmV0ZGIuaD4NCiNpbmNsdWRl IDxlcnJuby5oPg0KI2luY2x1ZGUgPHN5cy90aW1lLmg+DQojaW5jbHVkZSA8 c3lzL3R5cGVzLmg+DQojaW5jbHVkZSA8c3lzL3NvY2tldC5oPg0KI2luY2x1 ZGUgPG5ldGluZXQvaW4uaD4NCiNpbmNsdWRlIDxuZXRpbmV0L3RjcC5oPg0K DQoNCiNpZm5kZWYgQlVGU0laDQojZGVmaW5lIEJVRlNJWiA0MDk2DQojZW5k aWYNCg0KI2lmbmRlZiBUUlVFIA0KI2RlZmluZSBUUlVFIDENCiNlbmRpZg0K DQojaWZuZGVmIEZBTFNFDQojZGVmaW5lIEZBTFNFIDANCiNlbmRpZg0KDQoj ZGVmaW5lIFNNQUxMQlVGIDgwDQoNCiNkZWZpbmUgREVGQVVMVF9QT1JUIDQ4 OTgNCiNkZWZpbmUgTkFTQV9GT1JNQVQgIiVbXiBdIC0gLSBcWyVbXl1dXSBc IiVzICVzICVbXlwiXVwiICVkICVkIiANCiNkZWZpbmUgTkFTQV9USU1FX0ZP Uk1BVCAiJVteL10vJVteL10vJVteOl06JVteOl06JVteOl06JVteIF0gJXMi 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