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Bugs item #2819559, was opened at 2009-07-10 16:06 Message generated for change (Tracker Item Submitted) made by mera-nn You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=703942&aid=2819559&group_id=125852 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: SFTP Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: mera (mera-nn) Assigned to: Nobody/Anonymous (nobody) Summary: high cpu usage during SFTP copying (nonblock mode) Initial Comment: Using test sftp copying binary , high cpu usage observed. Seems curl uses nonblock mode so sftp usage using curl library is high. Originally issue observed using curl library. The logs below: Using latest libssh2 [r...@localhost simple]# pwd /root/libssh2-1.1/example/simple [r...@localhost simple]#./sftp_write 192.168.35.75 user pass test.sftp /tmp/test.block Fingerprint: 11 12 A1 54 1C 8D 65 40 DD 45 EC F9 12 25 A0 59 libssh2_sftp_init()! libssh2_sftp_open()! libssh2_sftp_open() is done, now send data! all done cpu usage is OK: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2611 root 15 0 4808 1544 1264 S 11.7 0.1 0:01.48 lt-sftp_write [r...@localhost simple]# ./sftp_write_nonblock 192.168.35.75 user pass test.sftp /tmp/test.nonblock Fingerprint: 11 12 A1 54 1C 8D 65 40 DD 45 EC F9 12 25 A0 59 libssh2_sftp_init()! libssh2_sftp_open()! libssh2_sftp_open() is done, now send data! all done High cpu usage !!! PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2561 root 25 0 4804 1464 1244 R 99.3 0.1 0:09.71 lt-sftp_write_non_block RedHat Enterprise Linux Server 5.1. But, I tested this scenario on 3 platforms. Same effect. So, I think won't be a big problem to reproduce this issue on any Linux platform. Please, confirm. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=703942&aid=2819559&group_id=125852 ------------------------------------------------------------------------------ Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge _______________________________________________ libssh2-devel mailing list libssh2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libssh2-devel
