diff options
| author | Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2007-07-07 23:21:49 +0900 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2007-07-10 17:33:04 +0100 |
| commit | 83fd38cabc982db041d3586a15734713f45caa31 (patch) | |
| tree | 8d26cf57da12566d291810e6e66127f851ed7425 /arch | |
| parent | 6312e0ee45236b6882cd26b2ccc167b1b91646fc (diff) | |
| download | linux-83fd38cabc982db041d3586a15734713f45caa31.tar.bz2 | |
[MIPS] Add debugfs files to show fpuemu statistics
Export contents of struct mips_fpu_emulator_stats via debugfs.
There is no way to read these statistics for now but they (at least
the "emulated" count) might be sometimes useful for performance tuning
on FPU-less CPUs.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/math-emu/cp1emu.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c index 80531b35cd61..d7f05b0abe17 100644 --- a/arch/mips/math-emu/cp1emu.c +++ b/arch/mips/math-emu/cp1emu.c @@ -35,6 +35,7 @@ * better performance by compiling with -msoft-float! */ #include <linux/sched.h> +#include <linux/debugfs.h> #include <asm/inst.h> #include <asm/bootinfo.h> @@ -1277,3 +1278,36 @@ int fpu_emulator_cop1Handler(struct pt_regs *xcp, struct mips_fpu_struct *ctx, return sig; } + +#ifdef CONFIG_DEBUG_FS +extern struct dentry *mips_debugfs_dir; +static int __init debugfs_fpuemu(void) +{ + struct dentry *d, *dir; + int i; + static struct { + const char *name; + unsigned int *v; + } vars[] __initdata = { + { "emulated", &fpuemustats.emulated }, + { "loads", &fpuemustats.loads }, + { "stores", &fpuemustats.stores }, + { "cp1ops", &fpuemustats.cp1ops }, + { "cp1xops", &fpuemustats.cp1xops }, + { "errors", &fpuemustats.errors }, + }; + + if (!mips_debugfs_dir) + return -ENODEV; + dir = debugfs_create_dir("fpuemustats", mips_debugfs_dir); + if (IS_ERR(dir)) + return PTR_ERR(dir); + for (i = 0; i < ARRAY_SIZE(vars); i++) { + d = debugfs_create_u32(vars[i].name, S_IRUGO, dir, vars[i].v); + if (IS_ERR(d)) + return PTR_ERR(d); + } + return 0; +} +__initcall(debugfs_fpuemu); +#endif |