From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Subject: [PATCH V11_RESEND 01/10] powerpc/perf: Change name & type of 'pred' in power_pmu_bhrb_read
Date: Tue, 16 Feb 2016 12:07:01 +0530 [thread overview]
Message-ID: <1455604630-16214-2-git-send-email-khandual@linux.vnet.ibm.com> (raw)
In-Reply-To: <1455604630-16214-1-git-send-email-khandual@linux.vnet.ibm.com>
Branch record attributes 'mispred' and 'predicted' are single bit
fields as defined in the perf ABI. Hence the data type of the field
'pred' used during BHRB processing should be changed from integer
to bool. This patch also changes the name of the variable from 'pred'
to 'mispred' making the logical inversion process more meaningful
and readable.
Reported-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
---
arch/powerpc/perf/core-book3s.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index d1e65ce..a158923 100644
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -426,7 +426,8 @@ static void power_pmu_bhrb_read(struct cpu_hw_events *cpuhw)
{
u64 val;
u64 addr;
- int r_index, u_index, pred;
+ int r_index, u_index;
+ bool mispred;
r_index = 0;
u_index = 0;
@@ -438,7 +439,7 @@ static void power_pmu_bhrb_read(struct cpu_hw_events *cpuhw)
break;
else {
addr = val & BHRB_EA;
- pred = val & BHRB_PREDICTION;
+ mispred = val & BHRB_PREDICTION;
if (!addr)
/* invalid entry */
@@ -467,8 +468,9 @@ static void power_pmu_bhrb_read(struct cpu_hw_events *cpuhw)
* (ie. computed gotos/XL form)
*/
cpuhw->bhrb_entries[u_index].to = addr;
- cpuhw->bhrb_entries[u_index].mispred = pred;
- cpuhw->bhrb_entries[u_index].predicted = ~pred;
+ cpuhw->bhrb_entries[u_index].mispred = mispred;
+ cpuhw->bhrb_entries[u_index].predicted =
+ ~mispred;
/* Get from address in next entry */
val = read_bhrb(r_index++);
@@ -486,8 +488,9 @@ static void power_pmu_bhrb_read(struct cpu_hw_events *cpuhw)
cpuhw->bhrb_entries[u_index].from = addr;
cpuhw->bhrb_entries[u_index].to =
power_pmu_bhrb_to(addr);
- cpuhw->bhrb_entries[u_index].mispred = pred;
- cpuhw->bhrb_entries[u_index].predicted = ~pred;
+ cpuhw->bhrb_entries[u_index].mispred = mispred;
+ cpuhw->bhrb_entries[u_index].predicted =
+ ~mispred;
}
u_index++;
--
2.1.0
next prev parent reply other threads:[~2016-02-16 6:37 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-16 6:37 [PATCH V11_RESEND 00/10] powerpc/perf: Enable SW branch filters Anshuman Khandual
2016-02-16 6:37 ` Anshuman Khandual [this message]
2016-02-16 6:37 ` [PATCH V11_RESEND 02/10] powerpc/perf: Re organize PMU branch filter processing on POWER8 Anshuman Khandual
2016-02-16 6:37 ` [PATCH V11_RESEND 03/10] powerpc/perf: Restore privilege level filter support for BHRB Anshuman Khandual
2016-02-16 6:37 ` [PATCH V11_RESEND 04/10] powerpc/perf: Re organize BHRB processing Anshuman Khandual
2016-02-16 6:37 ` [PATCH V11_RESEND 05/10] powerpc/perf: Change the name of HW PMU branch filter tracking variable Anshuman Khandual
2016-02-16 6:37 ` [PATCH V11_RESEND 06/10] powerpc/lib: Add new branch analysis support functions Anshuman Khandual
2016-02-16 6:37 ` [PATCH V11_RESEND 07/10] powerpc/perf: Enable SW filtering in branch stack sampling framework Anshuman Khandual
2016-02-16 6:37 ` [PATCH V11_RESEND 08/10] powerpc/perf: Change POWER8 PMU configuration to work with SW filters Anshuman Khandual
2016-02-16 6:37 ` [PATCH V11_RESEND 09/10] powerpc/perf: Enable privilege mode SW branch filters Anshuman Khandual
2016-02-16 6:37 ` [PATCH V11_RESEND 10/10] selftests/powerpc: Add test for BHRB branch filters (HW & SW) Anshuman Khandual
2016-02-16 13:08 ` [PATCH V11_RESEND 00/10] powerpc/perf: Enable SW branch filters Christophe Leroy
2016-02-17 3:49 ` Anshuman Khandual
2016-02-17 4:23 ` Michael Ellerman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1455604630-16214-2-git-send-email-khandual@linux.vnet.ibm.com \
--to=khandual@linux.vnet.ibm.com \
--cc=linuxppc-dev@lists.ozlabs.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).