From: Paul Mackerras Date: Tue, 24 Mar 2009 05:52:34 +0000 (+1100) Subject: perf_counter tools: remove glib dependency and fix bugs in kerneltop.c X-Git-Tag: v2.6.31-rc1~383^2~440 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cbe46555dc4de6403cd757139d42289b5f21abb9;p=pandora-kernel.git perf_counter tools: remove glib dependency and fix bugs in kerneltop.c The glib dependency in kerneltop.c is only for a little bit of list manipulation, and I find it inconvenient. This adds a 'next' field to struct source_line, which lets us link them together into a list. The code to do the linking ourselves turns out to be no longer or more difficult than using glib. This also fixes a few other problems: - We need to #include to get PATH_MAX on powerpc. - We need to #include rather than have our own definitions of __u64 and __s64; on powerpc the installed headers define them to be unsigned long and long respectively, and if we have our own, different definition here that causes a compile error. - This takes out the x86 setting of errno from -ret in sys_perf_counter_open. My experiments on x86 indicate that the glibc syscall() does this for us already. - We had two CPU migration counters in the default set, which seems unnecessary; I changed one of them to a context switch counter. - In perfstat mode we were printing CPU cycles and instructions as milliseconds, and the cpu clock and task clock counters as events. This fixes that. - In perfstat mode we were still printing a blank line after the first counter, which was a holdover from when a task clock counter was automatically included as the first counter. This removes the blank line. - On a test machine here, parse_symbols() and parse_vmlinux() were taking long enough (almost 0.5 seconds) for the mmap buffer to overflow before we got to the first mmap_read() call, so this moves them before we open all the counters. - The error message if sys_perf_counter_open fails needs to use errno, not -fd[i][counter]. Signed-off-by: Paul Mackerras Acked-by: Peter Zijlstra Acked-by: Mike Galbraith Cc: Arjan van de Ven Orig-LKML-Reference: <18888.29986.340328.540512@cargo.ozlabs.ibm.com> Signed-off-by: Ingo Molnar --- Reading git-diff-tree failed