Date: Sat, 02 Jan 2021 20:02:18 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 252358] cp(1) of large files is causing 100% CPU utilization and poor transfer of ~168M/minute Message-ID: <bug-252358-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=252358 Bug ID: 252358 Summary: cp(1) of large files is causing 100% CPU utilization and poor transfer of ~168M/minute Product: Base System Version: CURRENT Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: guru@unixarea.de While using cp(1) to copy large files (seen with 36GByte) on UFS file systems with something like: # cp -p guru-20210102.tar.gz xxx the CPU utilization is 100% while the copied amount of data is poor (some 168MByte per minute). The cp(1) process shows in truss(1) only copy_file_range(2) sys calls with low frequency: # truss -p 37655 copy_file_range(0x3,0x0,0x4,0x0,0x200000,0x0) = 2097152 (0x200000) copy_file_range(0x3,0x0,0x4,0x0,0x200000,0x0) = 2097152 (0x200000) copy_file_range(0x3,0x0,0x4,0x0,0x200000,0x0) = 2097152 (0x200000) copy_file_range(0x3,0x0,0x4,0x0,0x200000,0x0) = 2097152 (0x200000) copy_file_range(0x3,0x0,0x4,0x0,0x200000,0x0) = 2097152 (0x200000) -- You are receiving this mail because: You are the assignee for the bug.home | help
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