Re: top, systat and hw.cpuspeed
On Wed, 23 Mar 2011, Amit Kulkarni wrote: Never know what they can do. But the current max is 6 GHz by IBM for any core, right? :) That case was the source of my doubts if 9.9 GHz is enough for everybody. The majority of current hardware do per core frequency scaling (or bursting), but hw.cpuspeed is reporting the BIOS CPU speed (considering over and under clocking) for each core before the scaling happens, right? The opposite is true, it reports the current clock speed and therefore my patch suggestion. Otherwise you, Toby and others are right about new individually clocked cores, but the change should go much deeper to the OS, involving kernel and respective part of sysctl interface in the first place. So going forward with such complicated CPU designs, top will lie or be misleading. What about 64+ cores (OpenBSD supports 64 cores!) and many of them idle with low frequencies? How do you display them? Regards, David
Re: top, systat and hw.cpuspeed
On 2011/03/24 11:17, David Vasek wrote: load averages: 1.93, 1.49, 1.35 /0 MHz kaffir.spa 41 processes: 1 running, 39 idle, 1 on processor CPU states: 98.2% user, 0.0% nice, 1.8% system, 0.0% interrupt, 0.0% idle Memory: Real: 147M/196M act/tot Free: 49M Swap: 12M/600M used/tot I had a simple check for greater-than-zero cpuspeed in the patch initially (and don't print anything otherwise), but I was not really sure if that could happen at all and on what archs. It definitly should be there. What architecture and CPU is this from? Btw, if there are any totally misleading values, shouldn't that be corrected by the kernel in the first place? But if the kernel doesn't know any better, I think zero from sysctl is ok. Just my opinion. This is on armish, but there will be others. The sysctl returns EOPNOTSUPP so it's hitting si-cpuspeed = 0;. If you run some automated clock control (like apmd -C), you never know to what clock the cpu-time statistics in top(1) and systat(1) are related to. You still don't exactly, as top(1)'s cpu-time statistics are over an interval, whereas hw.cpuspeed is instantaneous. I do think it may be useful to display this information somewhere, but I'm not convinced that top(1) is the right place. Anyway, HW_CPUSPEED is of type int, same as is HW_SETPERF. Not int[], only int. How could the individual cores be reported and controlled? Obviously they can't at present, the kernel would need to be extended. But if you're considering how the display might look with a hypothetical 10GHz processor, why wouldn't you want to think about how things could work with current cpu features?
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Re: top, systat and hw.cpuspeed
On Thu, 24 Mar 2011, Stuart Henderson wrote:
If you run some automated clock control (like apmd -C), you never
know to what clock the cpu-time statistics in top(1) and systat(1)
are related to.
You still don't exactly, as top(1)'s cpu-time statistics are over
an interval, whereas hw.cpuspeed is instantaneous. I do think it may
be useful to display this information somewhere, but I'm not convinced
that top(1) is the right place.
I am fully aware that it is not always completly exact, and but on the
other hand the CPU clock rate doesn't change immediately, it takes at least
5 seconds to drop/rise after the CPU load changes. At least on my Pentium-M
based Thinkpad, where I run apmd -C. Much better displaying this than
nothing, I believe.
I added it to top(1) (and would like to add it to systat(1) too), so as to
be able to read the other performance statistics (approximately) right,
without the need to switch to other virtual console/window/terminal every
a few seconds for other utility, like apm(1) in a loop.
Anyway, HW_CPUSPEED is of type int, same as is HW_SETPERF. Not int[],
only int. How could the individual cores be reported and controlled?
Obviously they can't at present, the kernel would need to be
extended. But if you're considering how the display might look with
a hypothetical 10GHz processor, why wouldn't you want to think about
how things could work with current cpu features?
As I said, I was not aware of this trait of the new i-series Intel CPU's
and others. At least, the patch will work well and be useful on all
hardware except the latest, for which the kernel is not yet extended
anyway.
Below, there is the fixed and slightly improved version of the patch, if
somebody thinks it is still useful. But from point of view of our
discussion above, it remains the same, of course.
Regards,
David
Index: src/usr.bin/top/display.c
===
RCS file: /cvs/src/usr.bin/top/display.c,v
retrieving revision 1.40
diff -u -p -u -r1.40 display.c
--- src/usr.bin/top/display.c 23 Apr 2010 09:26:13 - 1.40
+++ src/usr.bin/top/display.c 24 Mar 2011 12:17:57 -
@@ -205,7 +205,7 @@ display_init(struct statics * statics)
}
void
-i_loadave(pid_t mpid, double *avenrun)
+i_loadave(pid_t mpid, double *avenrun, int cpuspeed)
{
if (screen_length 1 || !smart_terminal) {
int i;
@@ -220,6 +220,9 @@ i_loadave(pid_t mpid, double *avenrun)
for (i = 0; i 3; i++)
printwp(%c %5.2f, i == 0 ? ':' : ',', avenrun[i]);
+
+ if (cpuspeed != 0)
+ printwp( / %4d MHz, cpuspeed);
}
}
@@ -238,16 +241,25 @@ void
i_timeofday(time_t * tod)
{
static char buf[30];
+ int bufspace;
if (buf[0] == '\0')
gethostname(buf, sizeof(buf));
if (screen_length 1 || !smart_terminal) {
if (smart_terminal) {
- move(0, screen_width - 8 - strlen(buf) - 1);
+ /* Load averages and space fill up 35 chars,
+* cpu speed and space fill up 11 chars,
+* space and clock fill up 9 chars.
+*/
+ bufspace = screen_width - 35 - 11 - 9;
+ if (bufspace 0)
+ bufspace = 0;
+ move(0, screen_width - 8 - bufspace - 1);
} else {
if (fputs(, stdout) == EOF)
exit(1);
+ bufspace = 24;
}
#ifdef DEBUG
{
@@ -256,7 +268,7 @@ i_timeofday(time_t * tod)
addstrp(foo);
}
#endif
- printwp(%s %-8.8s, buf, (ctime(tod)[11]));
+ printwp(%*.*s %-8.8s, bufspace, bufspace, buf,
(ctime(tod)[11]));
putn();
}
}
Index: src/usr.bin/top/display.h
===
RCS file: /cvs/src/usr.bin/top/display.h,v
retrieving revision 1.11
diff -u -p -u -r1.11 display.h
--- src/usr.bin/top/display.h 22 Nov 2007 11:01:04 - 1.11
+++ src/usr.bin/top/display.h 24 Mar 2011 12:17:57 -
@@ -35,7 +35,7 @@
/* prototypes */
int display_resize(void);
-void i_loadave(int, double *);
+void i_loadave(int, double *, int);
void u_loadave(int, double *);
void i_timeofday(time_t *);
void i_procstates(int, int *);
Index: src/usr.bin/top/machine.c
===
RCS file: /cvs/src/usr.bin/top/machine.c,v
retrieving revision 1.67
diff -u -p -u -r1.67 machine.c
--- src/usr.bin/top/machine.c 26 Apr 2010 00:30:58 - 1.67
+++ src/usr.bin/top/machine.c 24 Mar 2011 12:17:58 -
@@ -204,6 +204,8 @@ format_header(char *uname_field)
void
get_system_info(struct system_info *si)
{
+ static int
Re: ksh completion
* Alexander Polakov polac...@gmail.com [110315 23:26]:
* Federico G. Schwindt fg...@lodoss.net [110315 17:38]:
I think I'm slightly confused as to you'd like fixed - do you mean that
one shouldn't need to escape a '[' if it's the first character? (note
that /bin/[ exists). Else, can you clarify a bit more? Thanks!
correct, shouldn't need to escape a '[' if it's teh first character.
i do know of [, but command and file completion are two different things.
see
bash too.
I don't want to be defensive, but hey, how is bash relevant? [ is treated as
a globbing character, you know. Is it first character or not, ksh doesn't
care,
it just tries to expand it.
Oh well, you can try expanding it and then - if it failed - escape it and
try again, like in the patch below. Bear in mind I didn't give it much
thought, because I have a feeling it's not a good idea.
And just for the archives, a patch that really works as advertised
(and using it for some time I feel like it *is* a good idea).
Index: bin/ksh/edit.c
===
RCS file: /cvs/src/bin/ksh/edit.c,v
retrieving revision 1.34
diff -u -r1.34 edit.c
--- bin/ksh/edit.c 20 May 2010 01:13:07 - 1.34
+++ bin/ksh/edit.c 21 Mar 2011 13:38:04 -
@@ -18,13 +18,14 @@
#include libgen.h
#include sys/stat.h
+#define ESCAPEDCHARS \#$'()*;=?[\\`{|}
static void x_sigwinch(int);
static volatile sig_atomic_t got_sigwinch;
static void check_sigwinch(void);
-static int x_file_glob(int, const char *, int, char ***);
-static int x_command_glob(int, const char *, int, char ***);
+static int x_file_glob(int, const char *, int, char ***, int);
+static int x_command_glob(int, const char *, int, char ***, int);
static int x_locate_word(const char *, int, int, int *, int *);
@@ -344,10 +345,11 @@
* - returns number of matching strings
*/
static int
-x_file_glob(int flags, const char *str, int slen, char ***wordsp)
+x_file_glob(int flags, const char *str, int slen, char ***wordsp, int
canrecurse)
{
char *toglob;
char **words;
+ char *estr;
int nwords, i, idx, escaping;
XPtrV w;
struct source *s, *sold;
@@ -365,6 +367,11 @@
continue;
}
+ /* specially escape escaped [ or $ or ` for globbing */
+ if (escaping (toglob[i] == '[' ||
+ toglob[i] == '$' || toglob[i] == '`'))
+ toglob[idx++] = QCHAR;
+
toglob[idx] = toglob[i];
idx++;
if (escaping) escaping = 0;
@@ -378,7 +385,7 @@
s = pushs(SWSTR, ATEMP);
s-start = s-str = toglob;
source = s;
- if (yylex(ONEWORD) != LWORD) {
+ if (yylex(ONEWORD|LQCHAR) != LWORD) {
source = sold;
internal_errorf(0, fileglob: substitute error);
return 0;
@@ -411,6 +418,21 @@
}
afree(toglob, ATEMP);
+ /* Globbing failed, do escaping and try again. */
+ if (!nwords !words canrecurse) {
+ estr = alloc(2 * slen + 1, ATEMP);
+ idx = 0;
+ for(i = 0; i slen; i++) {
+ if (strchr(ESCAPEDCHARS, str[i]))
+ estr[idx++] = '\\';
+ estr[idx++] = str[i];
+ }
+ estr[idx] = '\0';
+ nwords = x_file_glob(flags, estr, idx, wordsp, !canrecurse);
+ afree(estr, ATEMP);
+ return nwords;
+ }
+
if (nwords) {
*wordsp = words;
} else if (words) {
@@ -443,7 +465,7 @@
}
static int
-x_command_glob(int flags, const char *str, int slen, char ***wordsp)
+x_command_glob(int flags, const char *str, int slen, char ***wordsp, int
canrecurse)
{
char *toglob;
char *pat;
@@ -607,7 +629,7 @@
return 0;
nwords = (is_command ? x_command_glob : x_file_glob)(flags,
- buf + *startp, len, words);
+ buf + *startp, len, words, 1);
if (nwords == 0) {
*wordsp = (char **) 0;
return 0;
@@ -821,7 +843,7 @@
int rval = 0;
for (add = 0, wlen = len; wlen - add 0; add++) {
- if (strchr(\#$'()*;=?[\\]`{|}, s[add]) ||
+ if (strchr(ESCAPEDCHARS, s[add]) ||
strchr(ifs, s[add])) {
if (putbuf_func(s, add) != 0) {
rval = -1;
Index: bin/ksh/lex.c
===
RCS file: /cvs/src/bin/ksh/lex.c,v
retrieving revision 1.45
diff -u -r1.45 lex.c
--- bin/ksh/lex.c 9 Mar 2011 09:30:39 - 1.45
+++ bin/ksh/lex.c 21 Mar 2011 13:38:04 -
@@ -411,6 +411,13 @@
}
}
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Re: top, systat and hw.cpuspeed
On Thu, 24 Mar 2011 13:23:08 +0100 (CET) David Vasek wrote: I am fully aware that it is not always completly exact, and but on the other hand the CPU clock rate doesn't change immediately, it takes at least 5 seconds to drop/rise after the CPU load changes. At least on my Pentium-M based Thinkpad, where I run apmd -C. I've seen an intel tool just for this job showing the cpu scaled up for a second at a time. Much better displaying this than nothing, I believe. Sustained is certainly more important to a process monitor normal usage, when batteries don't matter.
Re: ksh completion
On Thu, Mar 24, 2011 at 15:48:56 +0300, Alexander Polakov wrote: And just for the archives, a patch that really works as advertised (and using it for some time I feel like it *is* a good idea). It is really working well. Thanks! However, I don't quite understand why '[' needs to be escaped during completion: $ ls -la [\ ]\ [\ ]\ []\ ][ $ ls -la \[\ ]\ \[\ ]\ \[]\ ]\[ these two produce the same result: -rw-r--r-- 1 daniell daniell 0 Mar 24 15:38:38 2011 [ ] [ ] [] ][ Daniel -- LIVAI Daniel PGP key ID = 0x83B63A8F Key fingerprint = DBEC C66B A47A DFA2 792D 650C C69B BE4C 83B6 3A8F
Re: top, systat and hw.cpuspeed
On Wed, 23 Mar 2011, Kevin Chadwick wrote: On Thu, 24 Mar 2011 13:23:08 +0100 (CET) David Vasek wrote: I am fully aware that it is not always completly exact, and but on the other hand the CPU clock rate doesn't change immediately, it takes at least 5 seconds to drop/rise after the CPU load changes. At least on my Pentium-M based Thinkpad, where I run apmd -C. I've seen an intel tool just for this job showing the cpu scaled up for a second at a time. But do we have any method to get some averaged CPU frequency for the past interval? We don't have any. When I take in account that some other values in top(1) are not averaged either, but they are what they are at the moment of sampling, I think that current hw.cpuspeed is not that bad. But one must remember what it actually displays, after having read the man page carefully. Regards, David
Re: ksh completion
On Thu, Mar 24, 2011 at 03:40:56PM +0100, LEVAI Daniel wrote: On Thu, Mar 24, 2011 at 15:48:56 +0300, Alexander Polakov wrote: And just for the archives, a patch that really works as advertised (and using it for some time I feel like it *is* a good idea). It is really working well. Thanks! However, I don't quite understand why '[' needs to be escaped during completion: $ ls -la [\ ]\ [\ ]\ []\ ][ $ ls -la \[\ ]\ \[\ ]\ \[]\ ]\[ these two produce the same result: -rw-r--r-- 1 daniell daniell 0 Mar 24 15:38:38 2011 [ ] [ ] [] ][ for the following for example: $ touch adef '[abc]def' $ ls [abc]def adef $ ls \[abc]def [abc]def $ Daniel Janjaap van Velthooven -- / __/ /_/ __/ /_ __/ __/ /___ / / /_ __/___/_/_ /___ / / __/ /___ / / janj...@stack.nl /___/_/_/_/_/_/_/___/_/_/
Re: ksh completion
On Thu, Mar 24, 2011 at 16:30:12 +0100, Janjaap van Velthooven wrote: On Thu, Mar 24, 2011 at 03:40:56PM +0100, LEVAI Daniel wrote: On Thu, Mar 24, 2011 at 15:48:56 +0300, Alexander Polakov wrote: And just for the archives, a patch that really works as advertised (and using it for some time I feel like it *is* a good idea). It is really working well. Thanks! However, I don't quite understand why '[' needs to be escaped during completion: $ ls -la [\ ]\ [\ ]\ []\ ][ $ ls -la \[\ ]\ \[\ ]\ \[]\ ]\[ these two produce the same result: -rw-r--r-- 1 daniell daniell 0 Mar 24 15:38:38 2011 [ ] [ ] [] ][ for the following for example: $ touch adef '[abc]def' $ ls [abc]def adef $ ls \[abc]def [abc]def $ Oh, how marvelous! Thanks! Daniel -- LIVAI Daniel PGP key ID = 0x83B63A8F Key fingerprint = DBEC C66B A47A DFA2 792D 650C C69B BE4C 83B6 3A8F
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