From: Jian P. <ji...@br...> - 2011-04-19 01:13:11
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I am running Linux 2.6.31 and enabled Oprofile support in kernel image, and run simple testing as follow, # opcontrol --init # # opcontrol --vmlinux=/root/vmlinux-initrd-7468b0-opf # # opcontrol --separate=kernel # # opcontrol --event=CYCLES:5000 # # opcontrol --status Daemon not running Event 0: CYCLES:5000:0:1:1 Separate options: library kernel vmlinux file: /root/vmlinux-initrd-7468b0-opf Image filter: none Call-graph depth: 0 # # # opcontrol --start /bin/opcontrol: line 1081: echo: write error: Invalid argument Using 2.6+ OProfile kernel interface. Reading module info. Using log file /var/lib/oprofile/samples/oprofiled.log Daemon started. Profiler running. # # # opcontrol --stop Stopping profiling. # # # opreport --symbols Overflow stats not available warning: /bin/bash could not be found. warning: /bin/busybox could not be found. warning: /bin/ophelp could not be found. warning: /bin/oprofiled could not be found. warning: /lib/ld-uClibc-0.9.29.so could not be found. warning: /lib/libdl-0.9.29.so could not be found. warning: /lib/libgcc_s.so.1 could not be found. warning: /lib/libuClibc-0.9.29.so could not be found. warning: /root/vmlinux-initrd-7468b0-opf could not be found. CPU: Broadcom BMIPS3300, speed 405 MHz (estimated) Counted CYCLES events (Processor cycles (PClock)) with a unit mask of 0x00 (No unit mask) count 5000 samples % image name app name symbol name 389217 62.4515 vmlinux-initrd-7468b0-opf vmlinux-initrd-7468b0-opf /root/vmlinux-initrd-7468b0-opf 159935 25.6622 oprofiled oprofiled /bin/oprofiled 18333 2.9416 bash bash /bin/bash 16124 2.5872 vmlinux-initrd-7468b0-opf busybox /root/vmlinux-initrd-7468b0-opf 12276 1.9697 vmlinux-initrd-7468b0-opf bash /root/vmlinux-initrd-7468b0-opf 7200 1.1553 vmlinux-initrd-7468b0-opf oprofiled /root/vmlinux-initrd-7468b0-opf 7139 1.1455 ld-uClibc-0.9.29.so busybox /lib/ld-uClibc-0.9.29.so 4908 0.7875 libuClibc-0.9.29.so bash /lib/libuClibc-0.9.29.so 2663 0.4273 vmlinux-initrd-7468b0-opf ophelp /root/vmlinux-initrd-7468b0-opf 1319 0.2116 ld-uClibc-0.9.29.so ophelp /lib/ld-uClibc-0.9.29.so 1282 0.2057 busybox busybox /bin/busybox 1185 0.1901 libuClibc-0.9.29.so busybox /lib/libuClibc-0.9.29.so 555 0.0891 ld-uClibc-0.9.29.so bash /lib/ld-uClibc-0.9.29.so 462 0.0741 libuClibc-0.9.29.so oprofiled /lib/libuClibc-0.9.29.so 369 0.0592 libuClibc-0.9.29.so ophelp /lib/libuClibc-0.9.29.so 208 0.0334 ophelp ophelp /bin/ophelp 40 0.0064 libgcc_s.so.1 bash /lib/libgcc_s.so.1 11 0.0018 libgcc_s.so.1 ophelp /lib/libgcc_s.so.1 5 8.0e-04 libdl-0.9.29.so bash /lib/libdl-0.9.29.so WHY there is warning while all files can be located??? warning: /root/vmlinux-initrd-7468b0-opf could not be found. Is that the reason why no symbol info was dumped? How to fix it? Thanks, Jian |