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| author | Adrian Hunter <adrian.hunter@intel.com> | 2016-10-07 16:42:25 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-10-24 10:31:32 -0300 |
| commit | 32f98aab75dd385e326c975717f8b730c6c57508 (patch) | |
| tree | 08f9357a1e5ee223e2c2e760ec2a397b1324b92e /tools/perf/util/intel-pt.c | |
| parent | e9c848928abf4cb60601e9ae7d336f0333c98bca (diff) | |
| download | op-kernel-dev-32f98aab75dd385e326c975717f8b730c6c57508.zip op-kernel-dev-32f98aab75dd385e326c975717f8b730c6c57508.tar.gz | |
perf intel-pt/bts: Tidy instruction buffer size usage
Tidy instruction buffer size usage in preparation for copying the
instruction bytes onto samples.
The instruction buffer is presently used for debugging, so rename its
size macro from INTEL_PT_INSN_DBG_BUF_SZ to INTEL_PT_INSN_BUF_SZ, and
use it everywhere.
Note that the maximum instruction size is 15 which is a less efficient size
to copy than 16, which is why a separate buffer size is used.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1475847747-30994-2-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/intel-pt.c')
| -rw-r--r-- | tools/perf/util/intel-pt.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c index dc041d4..815a14d 100644 --- a/tools/perf/util/intel-pt.c +++ b/tools/perf/util/intel-pt.c @@ -428,8 +428,7 @@ static int intel_pt_walk_next_insn(struct intel_pt_insn *intel_pt_insn, struct machine *machine = ptq->pt->machine; struct thread *thread; struct addr_location al; - unsigned char buf[1024]; - size_t bufsz; + unsigned char buf[INTEL_PT_INSN_BUF_SZ]; ssize_t len; int x86_64; u8 cpumode; @@ -440,8 +439,6 @@ static int intel_pt_walk_next_insn(struct intel_pt_insn *intel_pt_insn, if (to_ip && *ip == to_ip) goto out_no_cache; - bufsz = intel_pt_insn_max_size(); - if (*ip >= ptq->pt->kernel_start) cpumode = PERF_RECORD_MISC_KERNEL; else @@ -493,7 +490,8 @@ static int intel_pt_walk_next_insn(struct intel_pt_insn *intel_pt_insn, while (1) { len = dso__data_read_offset(al.map->dso, machine, - offset, buf, bufsz); + offset, buf, + INTEL_PT_INSN_BUF_SZ); if (len <= 0) return -EINVAL; |
