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From: "Jan Beulich" <JBeulich@suse.com>
To: xen-devel <xen-devel@lists.xenproject.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
	Dario Faggioli <dario.faggioli@citrix.com>,
	Joao Martins <joao.m.martins@oracle.com>
Subject: [PATCH 7/8] x86/time: fold recurring code
Date: Wed, 15 Jun 2016 04:30:01 -0600	[thread overview]
Message-ID: <57614A4902000078000F53AD@prv-mh.provo.novell.com> (raw)
In-Reply-To: <576140F302000078000F52FE@prv-mh.provo.novell.com>

[-- Attachment #1: Type: text/plain, Size: 2257 bytes --]

Common code between time_calibration_{std,tsc}_rendezvous() can better
live in a single place, eliminating the risk of adjusting one without
the other.

Signed-off-by: Jan Beulich <jbeulich@suse.com>

--- a/xen/arch/x86/time.c
+++ b/xen/arch/x86/time.c
@@ -1263,6 +1263,18 @@ struct calibration_rendezvous {
     u64 master_tsc_stamp;
 };
 
+static void
+time_calibration_rendezvous_tail(const struct calibration_rendezvous *r)
+{
+    struct cpu_calibration *c = &this_cpu(cpu_calibration);
+
+    c->local_tsc_stamp = rdtsc_ordered();
+    c->stime_local_stamp = get_s_time_fixed(c->local_tsc_stamp);
+    c->stime_master_stamp = r->master_stime;
+
+    raise_softirq(TIME_CALIBRATE_SOFTIRQ);
+}
+
 /*
  * Keep TSCs in sync when they run at the same rate, but may stop in
  * deep-sleep C states.
@@ -1270,7 +1282,6 @@ struct calibration_rendezvous {
 static void time_calibration_tsc_rendezvous(void *_r)
 {
     int i;
-    struct cpu_calibration *c = &this_cpu(cpu_calibration);
     struct calibration_rendezvous *r = _r;
     unsigned int total_cpus = cpumask_weight(&r->cpu_calibration_map);
 
@@ -1311,17 +1322,12 @@ static void time_calibration_tsc_rendezv
         }
     }
 
-    c->local_tsc_stamp = rdtsc_ordered();
-    c->stime_local_stamp = get_s_time_fixed(c->local_tsc_stamp);
-    c->stime_master_stamp = r->master_stime;
-
-    raise_softirq(TIME_CALIBRATE_SOFTIRQ);
+    time_calibration_rendezvous_tail(r);
 }
 
 /* Ordinary rendezvous function which does not modify TSC values. */
 static void time_calibration_std_rendezvous(void *_r)
 {
-    struct cpu_calibration *c = &this_cpu(cpu_calibration);
     struct calibration_rendezvous *r = _r;
     unsigned int total_cpus = cpumask_weight(&r->cpu_calibration_map);
 
@@ -1341,11 +1347,7 @@ static void time_calibration_std_rendezv
         mb(); /* receive signal /then/ read r->master_stime */
     }
 
-    c->local_tsc_stamp = rdtsc_ordered();
-    c->stime_local_stamp = get_s_time_fixed(c->local_tsc_stamp);
-    c->stime_master_stamp = r->master_stime;
-
-    raise_softirq(TIME_CALIBRATE_SOFTIRQ);
+    time_calibration_rendezvous_tail(r);
 }
 
 static void (*time_calibration_rendezvous_fn)(void *) =




[-- Attachment #2: x86-time-calibration-fold.patch --]
[-- Type: text/plain, Size: 2284 bytes --]

x86/time: fold recurring code

Common code between time_calibration_{std,tsc}_rendezvous() can better
live in a single place, eliminating the risk of adjusting one without
the other.

Signed-off-by: Jan Beulich <jbeulich@suse.com>

--- a/xen/arch/x86/time.c
+++ b/xen/arch/x86/time.c
@@ -1263,6 +1263,18 @@ struct calibration_rendezvous {
     u64 master_tsc_stamp;
 };
 
+static void
+time_calibration_rendezvous_tail(const struct calibration_rendezvous *r)
+{
+    struct cpu_calibration *c = &this_cpu(cpu_calibration);
+
+    c->local_tsc_stamp = rdtsc_ordered();
+    c->stime_local_stamp = get_s_time_fixed(c->local_tsc_stamp);
+    c->stime_master_stamp = r->master_stime;
+
+    raise_softirq(TIME_CALIBRATE_SOFTIRQ);
+}
+
 /*
  * Keep TSCs in sync when they run at the same rate, but may stop in
  * deep-sleep C states.
@@ -1270,7 +1282,6 @@ struct calibration_rendezvous {
 static void time_calibration_tsc_rendezvous(void *_r)
 {
     int i;
-    struct cpu_calibration *c = &this_cpu(cpu_calibration);
     struct calibration_rendezvous *r = _r;
     unsigned int total_cpus = cpumask_weight(&r->cpu_calibration_map);
 
@@ -1311,17 +1322,12 @@ static void time_calibration_tsc_rendezv
         }
     }
 
-    c->local_tsc_stamp = rdtsc_ordered();
-    c->stime_local_stamp = get_s_time_fixed(c->local_tsc_stamp);
-    c->stime_master_stamp = r->master_stime;
-
-    raise_softirq(TIME_CALIBRATE_SOFTIRQ);
+    time_calibration_rendezvous_tail(r);
 }
 
 /* Ordinary rendezvous function which does not modify TSC values. */
 static void time_calibration_std_rendezvous(void *_r)
 {
-    struct cpu_calibration *c = &this_cpu(cpu_calibration);
     struct calibration_rendezvous *r = _r;
     unsigned int total_cpus = cpumask_weight(&r->cpu_calibration_map);
 
@@ -1341,11 +1347,7 @@ static void time_calibration_std_rendezv
         mb(); /* receive signal /then/ read r->master_stime */
     }
 
-    c->local_tsc_stamp = rdtsc_ordered();
-    c->stime_local_stamp = get_s_time_fixed(c->local_tsc_stamp);
-    c->stime_master_stamp = r->master_stime;
-
-    raise_softirq(TIME_CALIBRATE_SOFTIRQ);
+    time_calibration_rendezvous_tail(r);
 }
 
 static void (*time_calibration_rendezvous_fn)(void *) =

[-- Attachment #3: Type: text/plain, Size: 126 bytes --]

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  parent reply	other threads:[~2016-06-15 10:30 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-15  9:50 [PATCH 0/8] x86/time: improve cross-CPU clock monotonicity (and more) Jan Beulich
2016-06-15 10:26 ` [PATCH 1/8] " Jan Beulich
2016-06-15 10:32   ` Jan Beulich
2016-06-15 22:51   ` Joao Martins
2016-06-16  8:27     ` Jan Beulich
2016-06-16 20:27       ` Joao Martins
2016-06-17  7:32         ` Jan Beulich
2016-06-21 12:05           ` Joao Martins
2016-06-21 12:28             ` Jan Beulich
2016-06-21 13:57               ` Joao Martins
2016-08-02 19:30   ` Andrew Cooper
2016-06-15 10:26 ` [PATCH 2/8] x86: also generate assembler usable equates for synthesized features Jan Beulich
2016-06-20 12:50   ` Andrew Cooper
2016-06-15 10:27 ` [PATCH 3/8] x86/time: introduce and use rdtsc_ordered() Jan Beulich
2016-06-20 12:59   ` Andrew Cooper
2016-06-20 13:06     ` Jan Beulich
2016-06-20 13:07       ` Andrew Cooper
2016-07-11 11:39     ` Dario Faggioli
2016-06-15 10:28 ` [PATCH 4/8] x86/time: calibrate TSC against platform timer Jan Beulich
2016-06-20 14:20   ` Andrew Cooper
2016-06-20 15:19     ` Jan Beulich
2016-08-02 19:25       ` Andrew Cooper
2016-08-03  9:32         ` Jan Beulich
2016-06-15 10:28 ` [PATCH 5/8] x86/time: correctly honor late clearing of TSC related feature flags Jan Beulich
2016-06-20 14:32   ` Andrew Cooper
2016-06-20 15:20     ` Jan Beulich
2016-07-04 15:39       ` Andrew Cooper
2016-07-04 15:53         ` Jan Beulich
2016-08-02 19:08           ` Andrew Cooper
2016-08-03  9:43             ` Jan Beulich
2016-08-31 13:42               ` Andrew Cooper
2016-08-31 14:03                 ` Jan Beulich
2016-06-15 10:29 ` [PATCH 6/8] x86/time: support 32-bit wide ACPI PM timer Jan Beulich
2016-07-04 15:40   ` Andrew Cooper
2016-06-15 10:30 ` Jan Beulich [this message]
2016-07-04 15:43   ` [PATCH 7/8] x86/time: fold recurring code Andrew Cooper
2016-06-15 10:30 ` [PATCH 8/8] x86/time: group time stamps into a structure Jan Beulich
2016-07-04 15:57   ` Andrew Cooper
2016-07-01  7:44 ` Ping: [PATCH 0/8] x86/time: improve cross-CPU clock monotonicity (and more) Jan Beulich

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