leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity
74ce1896c6
linux/arch/mips/math-emu/me-debugfs.c
Aleksandar Markovic 454854ace2 MIPS: math-emu: Add FP emu debugfs stats for individual instructions 
Add FP emulation debugfs statistics for individual instructions. The
debugfs files that contain counter values are placed in a separate
directory called "instructions". This means that the default path for
these new stat is "/sys/kernel/debug/mips/fpuemustats/instructions".

Each instruction counter is mapped to the debugfs file that has the
same name as instruction name. The lowercase is choosen as more
commonly used case for instruction names.

One example of usage:

mips_host::/sys/kernel/debug/mips/fpuemustats/instructions # grep "" *

The shortened output of this command is:

abs.d:34
abs.s:5711
add.d:10401
add.s:399307
bc1eqz:3199
...
...
...
sub.s:167211
trunc.l.d:375
trunc.l.s:8054
trunc.w.d:421
trunc.w.s:27032

The limitation of this patch is that it handles R6 FP emulation
instructions only. There are altogether 114 handled instructions.

Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com>
Signed-off-by: Goran Ferenc <goran.ferenc@imgtec.com>
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Cc: Douglas Leung <douglas.leung@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Maciej W. Rozycki <macro@imgtec.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Petar Jovanovic <petar.jovanovic@imgtec.com>
Cc: Raghu Gandham <raghu.gandham@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/17145/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29 15:21:57 +02:00

379 lines
12 KiB
C
Raw Blame History

#include <linux/cpumask.h>
#include <linux/debugfs.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/percpu.h>
#include <linux/types.h>
#include <asm/debug.h>
#include <asm/fpu_emulator.h>
#include <asm/local.h>
DEFINE_PER_CPU(struct mips_fpu_emulator_stats, fpuemustats);
static int fpuemu_stat_get(void *data, u64 *val)
{
int cpu;
unsigned long sum = 0;
for_each_online_cpu(cpu) {
struct mips_fpu_emulator_stats *ps;
local_t *pv;
ps = &per_cpu(fpuemustats, cpu);
pv = (void *)ps + (unsigned long)data;
sum += local_read(pv);
}
*val = sum;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(fops_fpuemu_stat, fpuemu_stat_get, NULL, "%llu\n");
/*
* Used to obtain names for a debugfs instruction counter, given field name
* in fpuemustats structure. For example, for input "cmp_sueq_d", the output
* would be "cmp.sueq.d". This is needed since dots are not allowed to be
* used in structure field names, and are, on the other hand, desired to be
* used in debugfs item names to be clearly associated to corresponding
* MIPS FPU instructions.
*/
static void adjust_instruction_counter_name(char *out_name, char *in_name)
{
int i = 0;
strcpy(out_name, in_name);
while (in_name[i] != '\0') {
if (out_name[i] == '_')
out_name[i] = '.';
i++;
}
}
static int fpuemustats_clear_show(struct seq_file *s, void *unused)
{
__this_cpu_write((fpuemustats).emulated, 0);
__this_cpu_write((fpuemustats).loads, 0);
__this_cpu_write((fpuemustats).stores, 0);
__this_cpu_write((fpuemustats).branches, 0);
__this_cpu_write((fpuemustats).cp1ops, 0);
__this_cpu_write((fpuemustats).cp1xops, 0);
__this_cpu_write((fpuemustats).errors, 0);
__this_cpu_write((fpuemustats).ieee754_inexact, 0);
__this_cpu_write((fpuemustats).ieee754_underflow, 0);
__this_cpu_write((fpuemustats).ieee754_overflow, 0);
__this_cpu_write((fpuemustats).ieee754_zerodiv, 0);
__this_cpu_write((fpuemustats).ieee754_invalidop, 0);
__this_cpu_write((fpuemustats).ds_emul, 0);
__this_cpu_write((fpuemustats).abs_s, 0);
__this_cpu_write((fpuemustats).abs_d, 0);
__this_cpu_write((fpuemustats).add_s, 0);
__this_cpu_write((fpuemustats).add_d, 0);
__this_cpu_write((fpuemustats).bc1eqz, 0);
__this_cpu_write((fpuemustats).bc1nez, 0);
__this_cpu_write((fpuemustats).ceil_w_s, 0);
__this_cpu_write((fpuemustats).ceil_w_d, 0);
__this_cpu_write((fpuemustats).ceil_l_s, 0);
__this_cpu_write((fpuemustats).ceil_l_d, 0);
__this_cpu_write((fpuemustats).class_s, 0);
__this_cpu_write((fpuemustats).class_d, 0);
__this_cpu_write((fpuemustats).cmp_af_s, 0);
__this_cpu_write((fpuemustats).cmp_af_d, 0);
__this_cpu_write((fpuemustats).cmp_eq_s, 0);
__this_cpu_write((fpuemustats).cmp_eq_d, 0);
__this_cpu_write((fpuemustats).cmp_le_s, 0);
__this_cpu_write((fpuemustats).cmp_le_d, 0);
__this_cpu_write((fpuemustats).cmp_lt_s, 0);
__this_cpu_write((fpuemustats).cmp_lt_d, 0);
__this_cpu_write((fpuemustats).cmp_ne_s, 0);
__this_cpu_write((fpuemustats).cmp_ne_d, 0);
__this_cpu_write((fpuemustats).cmp_or_s, 0);
__this_cpu_write((fpuemustats).cmp_or_d, 0);
__this_cpu_write((fpuemustats).cmp_ueq_s, 0);
__this_cpu_write((fpuemustats).cmp_ueq_d, 0);
__this_cpu_write((fpuemustats).cmp_ule_s, 0);
__this_cpu_write((fpuemustats).cmp_ule_d, 0);
__this_cpu_write((fpuemustats).cmp_ult_s, 0);
__this_cpu_write((fpuemustats).cmp_ult_d, 0);
__this_cpu_write((fpuemustats).cmp_un_s, 0);
__this_cpu_write((fpuemustats).cmp_un_d, 0);
__this_cpu_write((fpuemustats).cmp_une_s, 0);
__this_cpu_write((fpuemustats).cmp_une_d, 0);
__this_cpu_write((fpuemustats).cmp_saf_s, 0);
__this_cpu_write((fpuemustats).cmp_saf_d, 0);
__this_cpu_write((fpuemustats).cmp_seq_s, 0);
__this_cpu_write((fpuemustats).cmp_seq_d, 0);
__this_cpu_write((fpuemustats).cmp_sle_s, 0);
__this_cpu_write((fpuemustats).cmp_sle_d, 0);
__this_cpu_write((fpuemustats).cmp_slt_s, 0);
__this_cpu_write((fpuemustats).cmp_slt_d, 0);
__this_cpu_write((fpuemustats).cmp_sne_s, 0);
__this_cpu_write((fpuemustats).cmp_sne_d, 0);
__this_cpu_write((fpuemustats).cmp_sor_s, 0);
__this_cpu_write((fpuemustats).cmp_sor_d, 0);
__this_cpu_write((fpuemustats).cmp_sueq_s, 0);
__this_cpu_write((fpuemustats).cmp_sueq_d, 0);
__this_cpu_write((fpuemustats).cmp_sule_s, 0);
__this_cpu_write((fpuemustats).cmp_sule_d, 0);
__this_cpu_write((fpuemustats).cmp_sult_s, 0);
__this_cpu_write((fpuemustats).cmp_sult_d, 0);
__this_cpu_write((fpuemustats).cmp_sun_s, 0);
__this_cpu_write((fpuemustats).cmp_sun_d, 0);
__this_cpu_write((fpuemustats).cmp_sune_s, 0);
__this_cpu_write((fpuemustats).cmp_sune_d, 0);
__this_cpu_write((fpuemustats).cvt_d_l, 0);
__this_cpu_write((fpuemustats).cvt_d_s, 0);
__this_cpu_write((fpuemustats).cvt_d_w, 0);
__this_cpu_write((fpuemustats).cvt_l_s, 0);
__this_cpu_write((fpuemustats).cvt_l_d, 0);
__this_cpu_write((fpuemustats).cvt_s_d, 0);
__this_cpu_write((fpuemustats).cvt_s_l, 0);
__this_cpu_write((fpuemustats).cvt_s_w, 0);
__this_cpu_write((fpuemustats).cvt_w_s, 0);
__this_cpu_write((fpuemustats).cvt_w_d, 0);
__this_cpu_write((fpuemustats).div_s, 0);
__this_cpu_write((fpuemustats).div_d, 0);
__this_cpu_write((fpuemustats).floor_w_s, 0);
__this_cpu_write((fpuemustats).floor_w_d, 0);
__this_cpu_write((fpuemustats).floor_l_s, 0);
__this_cpu_write((fpuemustats).floor_l_d, 0);
__this_cpu_write((fpuemustats).maddf_s, 0);
__this_cpu_write((fpuemustats).maddf_d, 0);
__this_cpu_write((fpuemustats).max_s, 0);
__this_cpu_write((fpuemustats).max_d, 0);
__this_cpu_write((fpuemustats).maxa_s, 0);
__this_cpu_write((fpuemustats).maxa_d, 0);
__this_cpu_write((fpuemustats).min_s, 0);
__this_cpu_write((fpuemustats).min_d, 0);
__this_cpu_write((fpuemustats).mina_s, 0);
__this_cpu_write((fpuemustats).mina_d, 0);
__this_cpu_write((fpuemustats).mov_s, 0);
__this_cpu_write((fpuemustats).mov_d, 0);
__this_cpu_write((fpuemustats).msubf_s, 0);
__this_cpu_write((fpuemustats).msubf_d, 0);
__this_cpu_write((fpuemustats).mul_s, 0);
__this_cpu_write((fpuemustats).mul_d, 0);
__this_cpu_write((fpuemustats).neg_s, 0);
__this_cpu_write((fpuemustats).neg_d, 0);
__this_cpu_write((fpuemustats).recip_s, 0);
__this_cpu_write((fpuemustats).recip_d, 0);
__this_cpu_write((fpuemustats).rint_s, 0);
__this_cpu_write((fpuemustats).rint_d, 0);
__this_cpu_write((fpuemustats).round_w_s, 0);
__this_cpu_write((fpuemustats).round_w_d, 0);
__this_cpu_write((fpuemustats).round_l_s, 0);
__this_cpu_write((fpuemustats).round_l_d, 0);
__this_cpu_write((fpuemustats).rsqrt_s, 0);
__this_cpu_write((fpuemustats).rsqrt_d, 0);
__this_cpu_write((fpuemustats).sel_s, 0);
__this_cpu_write((fpuemustats).sel_d, 0);
__this_cpu_write((fpuemustats).seleqz_s, 0);
__this_cpu_write((fpuemustats).seleqz_d, 0);
__this_cpu_write((fpuemustats).selnez_s, 0);
__this_cpu_write((fpuemustats).selnez_d, 0);
__this_cpu_write((fpuemustats).sqrt_s, 0);
__this_cpu_write((fpuemustats).sqrt_d, 0);
__this_cpu_write((fpuemustats).sub_s, 0);
__this_cpu_write((fpuemustats).sub_d, 0);
__this_cpu_write((fpuemustats).trunc_w_s, 0);
__this_cpu_write((fpuemustats).trunc_w_d, 0);
__this_cpu_write((fpuemustats).trunc_l_s, 0);
__this_cpu_write((fpuemustats).trunc_l_d, 0);
return 0;
}
static int fpuemustats_clear_open(struct inode *inode, struct file *file)
{
return single_open(file, fpuemustats_clear_show, inode->i_private);
}
static const struct file_operations fpuemustats_clear_fops = {
.open = fpuemustats_clear_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int __init debugfs_fpuemu(void)
{
struct dentry *fpuemu_debugfs_base_dir;
struct dentry *fpuemu_debugfs_inst_dir;
struct dentry *d, *reset_file;
if (!mips_debugfs_dir)
return -ENODEV;
fpuemu_debugfs_base_dir = debugfs_create_dir("fpuemustats",
mips_debugfs_dir);
if (!fpuemu_debugfs_base_dir)
return -ENOMEM;
reset_file = debugfs_create_file("fpuemustats_clear", 0444,
mips_debugfs_dir, NULL,
&fpuemustats_clear_fops);
if (!reset_file)
return -ENOMEM;
#define FPU_EMU_STAT_OFFSET(m) \
offsetof(struct mips_fpu_emulator_stats, m)
#define FPU_STAT_CREATE(m) \
do { \
d = debugfs_create_file(#m, 0444, fpuemu_debugfs_base_dir, \
(void *)FPU_EMU_STAT_OFFSET(m), \
&fops_fpuemu_stat); \
if (!d) \
return -ENOMEM; \
} while (0)
FPU_STAT_CREATE(emulated);
FPU_STAT_CREATE(loads);
FPU_STAT_CREATE(stores);
FPU_STAT_CREATE(branches);
FPU_STAT_CREATE(cp1ops);
FPU_STAT_CREATE(cp1xops);
FPU_STAT_CREATE(errors);
FPU_STAT_CREATE(ieee754_inexact);
FPU_STAT_CREATE(ieee754_underflow);
FPU_STAT_CREATE(ieee754_overflow);
FPU_STAT_CREATE(ieee754_zerodiv);
FPU_STAT_CREATE(ieee754_invalidop);
FPU_STAT_CREATE(ds_emul);
fpuemu_debugfs_inst_dir = debugfs_create_dir("instructions",
fpuemu_debugfs_base_dir);
if (!fpuemu_debugfs_inst_dir)
return -ENOMEM;
#define FPU_STAT_CREATE_EX(m) \
do { \
char name[32]; \
\
adjust_instruction_counter_name(name, #m); \
\
d = debugfs_create_file(name, 0444, fpuemu_debugfs_inst_dir, \
(void *)FPU_EMU_STAT_OFFSET(m), \
&fops_fpuemu_stat); \
if (!d) \
return -ENOMEM; \
} while (0)
FPU_STAT_CREATE_EX(abs_s);
FPU_STAT_CREATE_EX(abs_d);
FPU_STAT_CREATE_EX(add_s);
FPU_STAT_CREATE_EX(add_d);
FPU_STAT_CREATE_EX(bc1eqz);
FPU_STAT_CREATE_EX(bc1nez);
FPU_STAT_CREATE_EX(ceil_w_s);
FPU_STAT_CREATE_EX(ceil_w_d);
FPU_STAT_CREATE_EX(ceil_l_s);
FPU_STAT_CREATE_EX(ceil_l_d);
FPU_STAT_CREATE_EX(class_s);
FPU_STAT_CREATE_EX(class_d);
FPU_STAT_CREATE_EX(cmp_af_s);
FPU_STAT_CREATE_EX(cmp_af_d);
FPU_STAT_CREATE_EX(cmp_eq_s);
FPU_STAT_CREATE_EX(cmp_eq_d);
FPU_STAT_CREATE_EX(cmp_le_s);
FPU_STAT_CREATE_EX(cmp_le_d);
FPU_STAT_CREATE_EX(cmp_lt_s);
FPU_STAT_CREATE_EX(cmp_lt_d);
FPU_STAT_CREATE_EX(cmp_ne_s);
FPU_STAT_CREATE_EX(cmp_ne_d);
FPU_STAT_CREATE_EX(cmp_or_s);
FPU_STAT_CREATE_EX(cmp_or_d);
FPU_STAT_CREATE_EX(cmp_ueq_s);
FPU_STAT_CREATE_EX(cmp_ueq_d);
FPU_STAT_CREATE_EX(cmp_ule_s);
FPU_STAT_CREATE_EX(cmp_ule_d);
FPU_STAT_CREATE_EX(cmp_ult_s);
FPU_STAT_CREATE_EX(cmp_ult_d);
FPU_STAT_CREATE_EX(cmp_un_s);
FPU_STAT_CREATE_EX(cmp_un_d);
FPU_STAT_CREATE_EX(cmp_une_s);
FPU_STAT_CREATE_EX(cmp_une_d);
FPU_STAT_CREATE_EX(cmp_saf_s);
FPU_STAT_CREATE_EX(cmp_saf_d);
FPU_STAT_CREATE_EX(cmp_seq_s);
FPU_STAT_CREATE_EX(cmp_seq_d);
FPU_STAT_CREATE_EX(cmp_sle_s);
FPU_STAT_CREATE_EX(cmp_sle_d);
FPU_STAT_CREATE_EX(cmp_slt_s);
FPU_STAT_CREATE_EX(cmp_slt_d);
FPU_STAT_CREATE_EX(cmp_sne_s);
FPU_STAT_CREATE_EX(cmp_sne_d);
FPU_STAT_CREATE_EX(cmp_sor_s);
FPU_STAT_CREATE_EX(cmp_sor_d);
FPU_STAT_CREATE_EX(cmp_sueq_s);
FPU_STAT_CREATE_EX(cmp_sueq_d);
FPU_STAT_CREATE_EX(cmp_sule_s);
FPU_STAT_CREATE_EX(cmp_sule_d);
FPU_STAT_CREATE_EX(cmp_sult_s);
FPU_STAT_CREATE_EX(cmp_sult_d);
FPU_STAT_CREATE_EX(cmp_sun_s);
FPU_STAT_CREATE_EX(cmp_sun_d);
FPU_STAT_CREATE_EX(cmp_sune_s);
FPU_STAT_CREATE_EX(cmp_sune_d);
FPU_STAT_CREATE_EX(cvt_d_l);
FPU_STAT_CREATE_EX(cvt_d_s);
FPU_STAT_CREATE_EX(cvt_d_w);
FPU_STAT_CREATE_EX(cvt_l_s);
FPU_STAT_CREATE_EX(cvt_l_d);
FPU_STAT_CREATE_EX(cvt_s_d);
FPU_STAT_CREATE_EX(cvt_s_l);
FPU_STAT_CREATE_EX(cvt_s_w);
FPU_STAT_CREATE_EX(cvt_w_s);
FPU_STAT_CREATE_EX(cvt_w_d);
FPU_STAT_CREATE_EX(div_s);
FPU_STAT_CREATE_EX(div_d);
FPU_STAT_CREATE_EX(floor_w_s);
FPU_STAT_CREATE_EX(floor_w_d);
FPU_STAT_CREATE_EX(floor_l_s);
FPU_STAT_CREATE_EX(floor_l_d);
FPU_STAT_CREATE_EX(maddf_s);
FPU_STAT_CREATE_EX(maddf_d);
FPU_STAT_CREATE_EX(max_s);
FPU_STAT_CREATE_EX(max_d);
FPU_STAT_CREATE_EX(maxa_s);
FPU_STAT_CREATE_EX(maxa_d);
FPU_STAT_CREATE_EX(min_s);
FPU_STAT_CREATE_EX(min_d);
FPU_STAT_CREATE_EX(mina_s);
FPU_STAT_CREATE_EX(mina_d);
FPU_STAT_CREATE_EX(mov_s);
FPU_STAT_CREATE_EX(mov_d);
FPU_STAT_CREATE_EX(msubf_s);
FPU_STAT_CREATE_EX(msubf_d);
FPU_STAT_CREATE_EX(mul_s);
FPU_STAT_CREATE_EX(mul_d);
FPU_STAT_CREATE_EX(neg_s);
FPU_STAT_CREATE_EX(neg_d);
FPU_STAT_CREATE_EX(recip_s);
FPU_STAT_CREATE_EX(recip_d);
FPU_STAT_CREATE_EX(rint_s);
FPU_STAT_CREATE_EX(rint_d);
FPU_STAT_CREATE_EX(round_w_s);
FPU_STAT_CREATE_EX(round_w_d);
FPU_STAT_CREATE_EX(round_l_s);
FPU_STAT_CREATE_EX(round_l_d);
FPU_STAT_CREATE_EX(rsqrt_s);
FPU_STAT_CREATE_EX(rsqrt_d);
FPU_STAT_CREATE_EX(sel_s);
FPU_STAT_CREATE_EX(sel_d);
FPU_STAT_CREATE_EX(seleqz_s);
FPU_STAT_CREATE_EX(seleqz_d);
FPU_STAT_CREATE_EX(selnez_s);
FPU_STAT_CREATE_EX(selnez_d);
FPU_STAT_CREATE_EX(sqrt_s);
FPU_STAT_CREATE_EX(sqrt_d);
FPU_STAT_CREATE_EX(sub_s);
FPU_STAT_CREATE_EX(sub_d);
FPU_STAT_CREATE_EX(trunc_w_s);
FPU_STAT_CREATE_EX(trunc_w_d);
FPU_STAT_CREATE_EX(trunc_l_s);
FPU_STAT_CREATE_EX(trunc_l_d);
return 0;
}
arch_initcall(debugfs_fpuemu);
Reference in New Issue View Git Blame Copy Permalink